Company lists · Data refreshed September 2026
Top 25 Biggest security companies worldwide
RevenueBase identified 30,460 company matches for biggest security companies worldwide as of September 2026 and tracks 787,136 professional contacts across them, including 158,125 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for biggest security companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026. Country and city lists for biggest security companies follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest biggest security companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 79,699 contacts → | ||||
Exact match “G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 40,747 contacts → | ||||
Exact match “50 Years of Excellence: Experience, Innovation, and Commitment to Safety.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 38,634 contacts → | ||||
Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 18,431 contacts → | ||||
Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 14,289 contacts → | ||||
Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 14,199 contacts → | ||||
Exact match “Verisure is the global leader in professionally monitored security services by customers served, with a market-leading presence across Europe and Latin America.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 12,771 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 11,169 contacts → | ||||
Exact match “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 10,793 contacts → | ||||
Exact match “At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 9,697 contacts → | ||||
Exact match “MANTECH is more than a technology company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 6,335 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 4,942 contacts → | ||||
Exact match “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 4,925 contacts → | ||||
Exact match “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 4,572 contacts → | ||||
Exact match “A Graber atua de forma pioneira na prestação de serviços de segurança desde 1982, introduzindo o conceito de projetos integrados na área de segurança.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 3,843 contacts → | ||||
Exact match “Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 3,673 contacts → | ||||
Exact match “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 3,620 contacts → | ||||
Exact match “Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 3,612 contacts → | ||||
Exact match “EVERYWHERE SECURITY MATTERS.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 3,592 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 3,387 contacts → | ||||
Exact match “Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 3,145 contacts → | ||||
Exact match “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 3,004 contacts → | ||||
Exact match “Securitas is a global knowledge leader in security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 2,523 contacts → | ||||
Exact match “NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 2,500 contacts → | ||||
Exact match “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 2,222 contacts → | ||||
Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “biggest security companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 30,460 biggest security companies worldwide
See the full list, filter by size, metro and specialty, and access 158,125 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Biggest security companies worldwide at a glance
As of Sep 21, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for biggest security companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “biggest security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 158,125 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Biggest security companies by location
158 lists · largest firstEvery Biggest security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Biggest security companies based in the United States8,122
- Biggest security companies based in India1,994
- Biggest security companies based in the United Kingdom1,817
- Biggest security companies based in Brazil1,162
- Biggest security companies based in Canada1,019
- Biggest security companies based in France958
- Biggest security companies based in Australia954
- Biggest security companies based in Germany705
- Biggest security companies based in the Netherlands489
- Biggest security companies based in Spain468
- Biggest security companies based in Italy461
- Biggest security companies based in the United Arab Emirates450
- Biggest security companies based in Mexico429
- Biggest security companies based in South Africa382
- Biggest security companies based in Türkiye300
- Biggest security companies based in Israel241
- Biggest security companies based in Argentina238
- Biggest security companies based in Colombia238
- Biggest security companies based in Chile237
- Biggest security companies based in Switzerland223
- Biggest security companies based in Pakistan222
- Biggest security companies based in Belgium215
- Biggest security companies based in Saudi Arabia209
- Biggest security companies based in Nigeria190
- Biggest security companies based in Poland188
- Biggest security companies based in Sweden187
- Biggest security companies based in Singapore175
- Biggest security companies based in Indonesia165
- Biggest security companies based in Malaysia132
- Biggest security companies based in Peru124
- Biggest security companies based in Kenya121
- Biggest security companies based in New Zealand116
- Biggest security companies based in Romania111
- Biggest security companies based in Egypt103
- Biggest security companies based in Austria102
- Biggest security companies based in Ecuador100
- Biggest security companies based in Bangladesh93
- Biggest security companies based in Ireland93
- Biggest security companies based in Portugal91
- Biggest security companies based in Greece90
- Biggest security companies based in Denmark88
- Biggest security companies based in the Philippines87
- Biggest security companies based in Czechia81
- Biggest security companies based in Japan79
- Biggest security companies based in Morocco78
- Biggest security companies based in Finland75
- Biggest security companies based in Hungary69
- Biggest security companies based in Ukraine61
- Biggest security companies based in Thailand58
- Biggest security companies based in Qatar57
- Biggest security companies based in Ghana56
- Biggest security companies based in Sri Lanka53
- Biggest security companies based in Bulgaria46
- Biggest security companies based in Jordan46
- Biggest security companies based in Norway46
- Biggest security companies based in the Dominican Republic46
- Biggest security companies based in Hong Kong41
- Biggest security companies based in Slovakia40
- Biggest security companies based in Tunisia40
- Biggest security companies based in Cyprus38
- Biggest security companies based in Luxembourg36
- Biggest security companies based in Panama35
- Biggest security companies based in Uruguay35
- Biggest security companies based in Costa Rica34
- Biggest security companies based in Nepal34
- Biggest security companies based in Venezuela33
- Biggest security companies based in Estonia31
- Biggest security companies based in Puerto Rico28
- Biggest security companies based in Taiwan26
- Biggest security companies based in Bahrain25
Cities
- Biggest security companies based in London, United Kingdom601
- Biggest security companies based in Sao Paulo, Brazil310
- Biggest security companies based in Bangalore, India217
- Biggest security companies based in New York, United States214
- Biggest security companies based in Toronto, Canada202
- Biggest security companies based in Melbourne, Australia170
- Biggest security companies based in Sydney, Australia163
- Biggest security companies based in Houston, United States149
- Biggest security companies based in Hyderabad, India145
- Biggest security companies based in Pune, India145
- Biggest security companies based in New Delhi, India143
- Biggest security companies based in Washington, United States143
- Biggest security companies based in Miami, United States126
- Biggest security companies based in Atlanta, United States125
- Biggest security companies based in Mumbai, India121
- Biggest security companies based in Dallas, United States118
- Biggest security companies based in Chicago, United States116
- Biggest security companies based in Austin, United States115
- Biggest security companies based in Chennai, India103
- Biggest security companies based in Montreal, Canada95
- Biggest security companies based in Noida, India92
- Biggest security companies based in Los Angeles, United States90
- Biggest security companies based in Tampa, United States90
- Biggest security companies based in Gurgaon, India85
- Biggest security companies based in Johannesburg, South Africa84
- Biggest security companies based in Rio De Janeiro, Brazil84
- Biggest security companies based in Ahmedabad, India82
- Biggest security companies based in Calgary, Canada78
- Biggest security companies based in San Francisco, United States75
- Biggest security companies based in Ottawa, Canada74
- Biggest security companies based in Arlington, United States72
- Biggest security companies based in Berlin, Germany69
- Biggest security companies based in Columbia, United States66
- Biggest security companies based in Brisbane, Australia64
- Biggest security companies based in Reston, United States63
- Biggest security companies based in Charlotte, United States62
- Biggest security companies based in Denver, United States61
- Biggest security companies based in San Diego, United States61
- Biggest security companies based in Manchester, United Kingdom60
- Biggest security companies based in Karachi, Pakistan59
- Biggest security companies based in Mclean, United States58
- Biggest security companies based in San Antonio, United States58
- Biggest security companies based in Orlando, United States56
- Biggest security companies based in Alexandria, United States55
- Biggest security companies based in Las Vegas, United States55
- Biggest security companies based in Delhi, India53
- Biggest security companies based in Baltimore, United States52
- Biggest security companies based in Boston, United States52
- Biggest security companies based in Vancouver, Canada52
- Biggest security companies based in Cape Town, South Africa51
- Biggest security companies based in Phoenix, United States51
- Biggest security companies based in Brasilia, Brazil49
- Biggest security companies based in Canberra, Australia47
- Biggest security companies based in Mississauga, Canada46
- Biggest security companies based in Seattle, United States46
- Biggest security companies based in Ashburn, United States44
- Biggest security companies based in Raleigh, United States44
- Biggest security companies based in Herndon, United States43
- Biggest security companies based in Fairfax, United States41
- Biggest security companies based in Huntsville, United States41
- Biggest security companies based in Perth, Australia40
- Biggest security companies based in Belo Horizonte, Brazil39
- Biggest security companies based in Birmingham, United Kingdom38
- Biggest security companies based in Vienna, United States36
- Biggest security companies based in Edmonton, Canada35
- Biggest security companies based in San Jose, United States35
- Biggest security companies based in Wilmington, United States35
- Biggest security companies based in Pittsburgh, United States34
- Biggest security companies based in Portland, United States33
- Biggest security companies based in Scottsdale, United States33
- Biggest security companies based in Chantilly, United States32
- Biggest security companies based in Colorado Springs, United States31
- Biggest security companies based in Curitiba, Brazil31
- Biggest security companies based in Munich, Germany31
- Biggest security companies based in Minneapolis, United States30
- Biggest security companies based in Indianapolis, United States29
- Biggest security companies based in Richmond, United States29
- Biggest security companies based in Adelaide, Australia28
- Biggest security companies based in Columbus, United States28
- Biggest security companies based in Fort Lauderdale, United States27
- Biggest security companies based in Hamburg, Germany27
- Biggest security companies based in Irvine, United States27
- Biggest security companies based in Nashville, United States27
- Biggest security companies based in Plano, United States27
- Biggest security companies based in Porto Alegre, Brazil27
- Biggest security companies based in Barueri, Brazil26
- Biggest security companies based in Springfield, United States26
- Biggest security companies based in Dover, United States25
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “biggest security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many biggest security companies are there worldwide?
RevenueBase identified 30,460 company matches for biggest security companies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
G4s tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most biggest security companies?
The United States leads with 8,122 companies, followed by India (1,994) and the United Kingdom (1,817). Every biggest security companies list by country and city is linked on this page.
Which city has the most biggest security companies?
London leads with 609 company records, followed by Sao Paulo (310) and Dubai (255).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 158,125 professional contacts with verified work emails tracked across these 30,460 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 30,460 biggest security companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
Company intelligence · public preview
Top 25 biggest security companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 30,460 matching company records for biggest security companies worldwide, with 787,136 tracked contacts and 158,125 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 biggest security companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  G4sg4s.comHQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 79,699 contacts → |
“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Prosegurprosegur.comHQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 40,747 contacts → |
“50 Years of Excellence: Experience, Innovation, and Commitment to Safety.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Securitas Security Services Usa, INCsecuritasinc.comHQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 38,634 contacts → |
“Securitas knows Security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Palo Alto Networkspaloaltonetworks.comHQ: Santa Clara, CA, United StatesReported employees: 10001+ | Santa Clara, CA, United States | 10001+ | Exact match | 18,431 contacts → |
“Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Fortinetfortinet.comHQ: Sunnyvale, CA, United StatesReported employees: 10001+ | Sunnyvale, CA, United States | 10001+ | Exact match | 14,289 contacts → |
“Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Verisureverisure.comHQ: Global Hq - Versoix, GermanyReported employees: 10001+ | Global Hq - Versoix, Germany | 10001+ | Exact match | 14,199 contacts → |
“Verisure is the global leader in professionally monitored security services by customers served, with a market-leading presence across Europe and Latin America.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Private Sectorlockervault.com HQ: United StatesReported employees: Not recorded | United States | Not recorded | Exact match | 12,771 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 |  Symantecbroadcom.comHQ: San Jose, CA, United StatesReported employees: 10001+ | San Jose, CA, United States | 10001+ | Exact match | 11,169 contacts → |
“Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Peratonperaton.comHQ: Reston, VA, United StatesReported employees: 10001+ | Reston, VA, United States | 10001+ | Exact match | 10,793 contacts → |
“At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Mantechmantech.comHQ: Herndon, VA, United StatesReported employees: 5,001-10,000 | Herndon, VA, United States | 5,001-10,000 | Exact match | 9,697 contacts → |
“MANTECH is more than a technology company.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Securitas Groupsecuritas.comHQ: Stockholm, SwedenReported employees: 10001+ | Stockholm, Sweden | 10001+ | Exact match | 6,335 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 12 | Trend Microtrendmicro.com HQ: Yoyogi, JapanReported employees: 5,001-10,000 | Yoyogi, Japan | 5,001-10,000 | Exact match | 4,942 contacts → |
“We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Sophossophos.comHQ: Abingdon, United KingdomReported employees: 5,001-10,000 | Abingdon, United Kingdom | 5,001-10,000 | Exact match | 4,925 contacts → |
“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Graber Sistemas DE Segurançagraber.com.brHQ: Barueri, BrazilReported employees: 10001+ | Barueri, Brazil | 10001+ | Exact match | 4,572 contacts → |
“A Graber atua de forma pioneira na prestação de serviços de segurança desde 1982, introduzindo o conceito de projetos integrados na área de segurança.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Securitas Francefrance.securitas.frHQ: Issy-les-moulineaux, FranceReported employees: 10001+ | Issy-les-moulineaux, France | 10001+ | Exact match | 3,843 contacts → |
“Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Orange Cyberdefenseorangecyberdefense.comHQ: Nanterre, FranceReported employees: 1,001-5,000 | Nanterre, France | 1,001-5,000 | Exact match | 3,673 contacts → |
“Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Securitas Seguridad Españasecuritas.esHQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 3,620 contacts → |
“Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Inter-Con Securityicsecurity.comHQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 3,612 contacts → |
“EVERYWHERE SECURITY MATTERS.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  U.S. Security Associates, INCussecurityassociates.comHQ: Roswell, GA, United StatesReported employees: 10001+ | Roswell, GA, United States | 10001+ | Exact match | 3,592 contacts → |
“U.S.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Sicuritalia S.P.Asicuritalia.itHQ: Milano, ItalyReported employees: 10001+ | Milano, Italy | 10001+ | Exact match | 3,387 contacts → |
“Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Arctic Wolfarcticwolf.comHQ: Eden Prairie, MN, United StatesReported employees: 1,001-5,000 | Eden Prairie, MN, United States | 1,001-5,000 | Exact match | 3,145 contacts → |
“Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Securitas Sverige ABsecuritas.seHQ: Stockholm, SwedenReported employees: 5,001-10,000 | Stockholm, Sweden | 5,001-10,000 | Exact match | 3,004 contacts → |
“Securitas is a global knowledge leader in security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  NIL LTDnil.comHQ: Ljubljana, SloveniaReported employees: Not recorded | Ljubljana, Slovenia | Not recorded | Exact match | 2,523 contacts → |
“NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Culver City, CA, United StatesReported employees: 5,001-10,000 | Culver City, CA, United States | 5,001-10,000 | Exact match | 2,500 contacts → |
“The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  OPTIVoptiv.comHQ: Leawood, KS, United StatesReported employees: 1,001-5,000 | Leawood, KS, United States | 1,001-5,000 | Exact match | 2,222 contacts → |
“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 30,460 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Biggest security companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
30,379 records in the displayed employee bands.
81 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 30,460 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Biggest security companies by location
158 lists · largest firstEvery Biggest security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Biggest security companies based in the United States8,122
- Biggest security companies based in India1,994
- Biggest security companies based in the United Kingdom1,817
- Biggest security companies based in Brazil1,162
- Biggest security companies based in Canada1,019
- Biggest security companies based in France958
- Biggest security companies based in Australia954
- Biggest security companies based in Germany705
- Biggest security companies based in the Netherlands489
- Biggest security companies based in Spain468
- Biggest security companies based in Italy461
- Biggest security companies based in the United Arab Emirates450
- Biggest security companies based in Mexico429
- Biggest security companies based in South Africa382
- Biggest security companies based in Türkiye300
- Biggest security companies based in Israel241
- Biggest security companies based in Argentina238
- Biggest security companies based in Colombia238
- Biggest security companies based in Chile237
- Biggest security companies based in Switzerland223
- Biggest security companies based in Pakistan222
- Biggest security companies based in Belgium215
- Biggest security companies based in Saudi Arabia209
- Biggest security companies based in Nigeria190
- Biggest security companies based in Poland188
- Biggest security companies based in Sweden187
- Biggest security companies based in Singapore175
- Biggest security companies based in Indonesia165
- Biggest security companies based in Malaysia132
- Biggest security companies based in Peru124
- Biggest security companies based in Kenya121
- Biggest security companies based in New Zealand116
- Biggest security companies based in Romania111
- Biggest security companies based in Egypt103
- Biggest security companies based in Austria102
- Biggest security companies based in Ecuador100
- Biggest security companies based in Bangladesh93
- Biggest security companies based in Ireland93
- Biggest security companies based in Portugal91
- Biggest security companies based in Greece90
- Biggest security companies based in Denmark88
- Biggest security companies based in the Philippines87
- Biggest security companies based in Czechia81
- Biggest security companies based in Japan79
- Biggest security companies based in Morocco78
- Biggest security companies based in Finland75
- Biggest security companies based in Hungary69
- Biggest security companies based in Ukraine61
- Biggest security companies based in Thailand58
- Biggest security companies based in Qatar57
- Biggest security companies based in Ghana56
- Biggest security companies based in Sri Lanka53
- Biggest security companies based in Bulgaria46
- Biggest security companies based in Jordan46
- Biggest security companies based in Norway46
- Biggest security companies based in the Dominican Republic46
- Biggest security companies based in Hong Kong41
- Biggest security companies based in Slovakia40
- Biggest security companies based in Tunisia40
- Biggest security companies based in Cyprus38
- Biggest security companies based in Luxembourg36
- Biggest security companies based in Panama35
- Biggest security companies based in Uruguay35
- Biggest security companies based in Costa Rica34
- Biggest security companies based in Nepal34
- Biggest security companies based in Venezuela33
- Biggest security companies based in Estonia31
- Biggest security companies based in Puerto Rico28
- Biggest security companies based in Taiwan26
- Biggest security companies based in Bahrain25
Cities
- Biggest security companies based in London, United Kingdom601
- Biggest security companies based in Sao Paulo, Brazil310
- Biggest security companies based in Bangalore, India217
- Biggest security companies based in New York, United States214
- Biggest security companies based in Toronto, Canada202
- Biggest security companies based in Melbourne, Australia170
- Biggest security companies based in Sydney, Australia163
- Biggest security companies based in Houston, United States149
- Biggest security companies based in Hyderabad, India145
- Biggest security companies based in Pune, India145
- Biggest security companies based in New Delhi, India143
- Biggest security companies based in Washington, United States143
- Biggest security companies based in Miami, United States126
- Biggest security companies based in Atlanta, United States125
- Biggest security companies based in Mumbai, India121
- Biggest security companies based in Dallas, United States118
- Biggest security companies based in Chicago, United States116
- Biggest security companies based in Austin, United States115
- Biggest security companies based in Chennai, India103
- Biggest security companies based in Montreal, Canada95
- Biggest security companies based in Noida, India92
- Biggest security companies based in Los Angeles, United States90
- Biggest security companies based in Tampa, United States90
- Biggest security companies based in Gurgaon, India85
- Biggest security companies based in Johannesburg, South Africa84
- Biggest security companies based in Rio De Janeiro, Brazil84
- Biggest security companies based in Ahmedabad, India82
- Biggest security companies based in Calgary, Canada78
- Biggest security companies based in San Francisco, United States75
- Biggest security companies based in Ottawa, Canada74
- Biggest security companies based in Arlington, United States72
- Biggest security companies based in Berlin, Germany69
- Biggest security companies based in Columbia, United States66
- Biggest security companies based in Brisbane, Australia64
- Biggest security companies based in Reston, United States63
- Biggest security companies based in Charlotte, United States62
- Biggest security companies based in Denver, United States61
- Biggest security companies based in San Diego, United States61
- Biggest security companies based in Manchester, United Kingdom60
- Biggest security companies based in Karachi, Pakistan59
- Biggest security companies based in Mclean, United States58
- Biggest security companies based in San Antonio, United States58
- Biggest security companies based in Orlando, United States56
- Biggest security companies based in Alexandria, United States55
- Biggest security companies based in Las Vegas, United States55
- Biggest security companies based in Delhi, India53
- Biggest security companies based in Baltimore, United States52
- Biggest security companies based in Boston, United States52
- Biggest security companies based in Vancouver, Canada52
- Biggest security companies based in Cape Town, South Africa51
- Biggest security companies based in Phoenix, United States51
- Biggest security companies based in Brasilia, Brazil49
- Biggest security companies based in Canberra, Australia47
- Biggest security companies based in Mississauga, Canada46
- Biggest security companies based in Seattle, United States46
- Biggest security companies based in Ashburn, United States44
- Biggest security companies based in Raleigh, United States44
- Biggest security companies based in Herndon, United States43
- Biggest security companies based in Fairfax, United States41
- Biggest security companies based in Huntsville, United States41
- Biggest security companies based in Perth, Australia40
- Biggest security companies based in Belo Horizonte, Brazil39
- Biggest security companies based in Birmingham, United Kingdom38
- Biggest security companies based in Vienna, United States36
- Biggest security companies based in Edmonton, Canada35
- Biggest security companies based in San Jose, United States35
- Biggest security companies based in Wilmington, United States35
- Biggest security companies based in Pittsburgh, United States34
- Biggest security companies based in Portland, United States33
- Biggest security companies based in Scottsdale, United States33
- Biggest security companies based in Chantilly, United States32
- Biggest security companies based in Colorado Springs, United States31
- Biggest security companies based in Curitiba, Brazil31
- Biggest security companies based in Munich, Germany31
- Biggest security companies based in Minneapolis, United States30
- Biggest security companies based in Indianapolis, United States29
- Biggest security companies based in Richmond, United States29
- Biggest security companies based in Adelaide, Australia28
- Biggest security companies based in Columbus, United States28
- Biggest security companies based in Fort Lauderdale, United States27
- Biggest security companies based in Hamburg, Germany27
- Biggest security companies based in Irvine, United States27
- Biggest security companies based in Nashville, United States27
- Biggest security companies based in Plano, United States27
- Biggest security companies based in Porto Alegre, Brazil27
- Biggest security companies based in Barueri, Brazil26
- Biggest security companies based in Springfield, United States26
- Biggest security companies based in Dover, United States25
Questions about this company list
What does Exact match mean for biggest security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many biggest security companies did RevenueBase find worldwide?
The saved snapshot records 30,460 matching company records, 787,136 tracked contacts and 158,125 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 biggest security companies worldwide. Snapshot: September 21, 2026. https://revenuebase.ai/companies/browse/biggest-security-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 biggest security companies worldwide
RevenueBase records 30,460 matching company records for biggest security companies worldwide, with 787,136 tracked contacts and 158,125 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 biggest security companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | G4sg4s.com HQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 79,699 contacts → |
“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Prosegurprosegur.com HQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 40,747 contacts → |
“50 Years of Excellence: Experience, Innovation, and Commitment to Safety.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Securitas Security Services Usa, INCsecuritasinc.com HQ: Parsippany, NJ, United StatesReported employees: 10001+ | Parsippany, NJ, United States | 10001+ | Exact match | 38,634 contacts → |
“Securitas knows Security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Palo Alto Networkspaloaltonetworks.com HQ: Santa Clara, CA, United StatesReported employees: 10001+ | Santa Clara, CA, United States | 10001+ | Exact match | 18,431 contacts → |
“Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Fortinetfortinet.com HQ: Sunnyvale, CA, United StatesReported employees: 10001+ | Sunnyvale, CA, United States | 10001+ | Exact match | 14,289 contacts → |
“Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Verisureverisure.com HQ: Global Hq - Versoix, GermanyReported employees: 10001+ | Global Hq - Versoix, Germany | 10001+ | Exact match | 14,199 contacts → |
“Verisure is the global leader in professionally monitored security services by customers served, with a market-leading presence across Europe and Latin America.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Private Sectorlockervault.com HQ: United StatesReported employees: Not recorded | United States | Not recorded | Exact match | 12,771 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 | Symantecbroadcom.com HQ: San Jose, CA, United StatesReported employees: 10001+ | San Jose, CA, United States | 10001+ | Exact match | 11,169 contacts → |
“Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Peratonperaton.com HQ: Reston, VA, United StatesReported employees: 10001+ | Reston, VA, United States | 10001+ | Exact match | 10,793 contacts → |
“At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Mantechmantech.com HQ: Herndon, VA, United StatesReported employees: 5,001-10,000 | Herndon, VA, United States | 5,001-10,000 | Exact match | 9,697 contacts → |
“MANTECH is more than a technology company.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Securitas Groupsecuritas.com HQ: Stockholm, SwedenReported employees: 10001+ | Stockholm, Sweden | 10001+ | Exact match | 6,335 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 12 | Trend Microtrendmicro.com HQ: Yoyogi, JapanReported employees: 5,001-10,000 | Yoyogi, Japan | 5,001-10,000 | Exact match | 4,942 contacts → |
“We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Sophossophos.com HQ: Abingdon, United KingdomReported employees: 5,001-10,000 | Abingdon, United Kingdom | 5,001-10,000 | Exact match | 4,925 contacts → |
“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Graber Sistemas DE Segurançagraber.com.br HQ: Barueri, BrazilReported employees: 10001+ | Barueri, Brazil | 10001+ | Exact match | 4,572 contacts → |
“A Graber atua de forma pioneira na prestação de serviços de segurança desde 1982, introduzindo o conceito de projetos integrados na área de segurança.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Securitas Francefrance.securitas.fr HQ: Issy-les-moulineaux, FranceReported employees: 10001+ | Issy-les-moulineaux, France | 10001+ | Exact match | 3,843 contacts → |
“Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Orange Cyberdefenseorangecyberdefense.com HQ: Nanterre, FranceReported employees: 1,001-5,000 | Nanterre, France | 1,001-5,000 | Exact match | 3,673 contacts → |
“Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Securitas Seguridad Españasecuritas.es HQ: Madrid, SpainReported employees: 10001+ | Madrid, Spain | 10001+ | Exact match | 3,620 contacts → |
“Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Inter-Con Securityicsecurity.com HQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 3,612 contacts → |
“EVERYWHERE SECURITY MATTERS.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | U.S. Security Associates, INCussecurityassociates.com HQ: Roswell, GA, United StatesReported employees: 10001+ | Roswell, GA, United States | 10001+ | Exact match | 3,592 contacts → |
“U.S.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Sicuritalia S.P.Asicuritalia.it HQ: Milano, ItalyReported employees: 10001+ | Milano, Italy | 10001+ | Exact match | 3,387 contacts → |
“Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Arctic Wolfarcticwolf.com HQ: Eden Prairie, MN, United StatesReported employees: 1,001-5,000 | Eden Prairie, MN, United States | 1,001-5,000 | Exact match | 3,145 contacts → |
“Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Securitas Sverige ABsecuritas.se HQ: Stockholm, SwedenReported employees: 5,001-10,000 | Stockholm, Sweden | 5,001-10,000 | Exact match | 3,004 contacts → |
“Securitas is a global knowledge leader in security.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | NIL LTDnil.com HQ: Ljubljana, SloveniaReported employees: Not recorded | Ljubljana, Slovenia | Not recorded | Exact match | 2,523 contacts → |
“NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | HQ: Culver City, CA, United StatesReported employees: 5,001-10,000 | Culver City, CA, United States | 5,001-10,000 | Exact match | 2,500 contacts → |
“The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | OPTIVoptiv.com HQ: Leawood, KS, United StatesReported employees: 1,001-5,000 | Leawood, KS, United States | 1,001-5,000 | Exact match | 2,222 contacts → |
“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 30,460 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Biggest security companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
30,379 records in the displayed employee bands.
81 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 30,460 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Biggest security companies by location
158 lists · largest firstEvery Biggest security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Biggest security companies based in the United States8,122
- Biggest security companies based in India1,994
- Biggest security companies based in the United Kingdom1,817
- Biggest security companies based in Brazil1,162
- Biggest security companies based in Canada1,019
- Biggest security companies based in France958
- Biggest security companies based in Australia954
- Biggest security companies based in Germany705
- Biggest security companies based in the Netherlands489
- Biggest security companies based in Spain468
- Biggest security companies based in Italy461
- Biggest security companies based in the United Arab Emirates450
- Biggest security companies based in Mexico429
- Biggest security companies based in South Africa382
- Biggest security companies based in Türkiye300
- Biggest security companies based in Israel241
- Biggest security companies based in Argentina238
- Biggest security companies based in Colombia238
- Biggest security companies based in Chile237
- Biggest security companies based in Switzerland223
- Biggest security companies based in Pakistan222
- Biggest security companies based in Belgium215
- Biggest security companies based in Saudi Arabia209
- Biggest security companies based in Nigeria190
- Biggest security companies based in Poland188
- Biggest security companies based in Sweden187
- Biggest security companies based in Singapore175
- Biggest security companies based in Indonesia165
- Biggest security companies based in Malaysia132
- Biggest security companies based in Peru124
- Biggest security companies based in Kenya121
- Biggest security companies based in New Zealand116
- Biggest security companies based in Romania111
- Biggest security companies based in Egypt103
- Biggest security companies based in Austria102
- Biggest security companies based in Ecuador100
- Biggest security companies based in Bangladesh93
- Biggest security companies based in Ireland93
- Biggest security companies based in Portugal91
- Biggest security companies based in Greece90
- Biggest security companies based in Denmark88
- Biggest security companies based in the Philippines87
- Biggest security companies based in Czechia81
- Biggest security companies based in Japan79
- Biggest security companies based in Morocco78
- Biggest security companies based in Finland75
- Biggest security companies based in Hungary69
- Biggest security companies based in Ukraine61
- Biggest security companies based in Thailand58
- Biggest security companies based in Qatar57
- Biggest security companies based in Ghana56
- Biggest security companies based in Sri Lanka53
- Biggest security companies based in Bulgaria46
- Biggest security companies based in Jordan46
- Biggest security companies based in Norway46
- Biggest security companies based in the Dominican Republic46
- Biggest security companies based in Hong Kong41
- Biggest security companies based in Slovakia40
- Biggest security companies based in Tunisia40
- Biggest security companies based in Cyprus38
- Biggest security companies based in Luxembourg36
- Biggest security companies based in Panama35
- Biggest security companies based in Uruguay35
- Biggest security companies based in Costa Rica34
- Biggest security companies based in Nepal34
- Biggest security companies based in Venezuela33
- Biggest security companies based in Estonia31
- Biggest security companies based in Puerto Rico28
- Biggest security companies based in Taiwan26
- Biggest security companies based in Bahrain25
Cities
- Biggest security companies based in London, United Kingdom601
- Biggest security companies based in Sao Paulo, Brazil310
- Biggest security companies based in Bangalore, India217
- Biggest security companies based in New York, United States214
- Biggest security companies based in Toronto, Canada202
- Biggest security companies based in Melbourne, Australia170
- Biggest security companies based in Sydney, Australia163
- Biggest security companies based in Houston, United States149
- Biggest security companies based in Hyderabad, India145
- Biggest security companies based in Pune, India145
- Biggest security companies based in New Delhi, India143
- Biggest security companies based in Washington, United States143
- Biggest security companies based in Miami, United States126
- Biggest security companies based in Atlanta, United States125
- Biggest security companies based in Mumbai, India121
- Biggest security companies based in Dallas, United States118
- Biggest security companies based in Chicago, United States116
- Biggest security companies based in Austin, United States115
- Biggest security companies based in Chennai, India103
- Biggest security companies based in Montreal, Canada95
- Biggest security companies based in Noida, India92
- Biggest security companies based in Los Angeles, United States90
- Biggest security companies based in Tampa, United States90
- Biggest security companies based in Gurgaon, India85
- Biggest security companies based in Johannesburg, South Africa84
- Biggest security companies based in Rio De Janeiro, Brazil84
- Biggest security companies based in Ahmedabad, India82
- Biggest security companies based in Calgary, Canada78
- Biggest security companies based in San Francisco, United States75
- Biggest security companies based in Ottawa, Canada74
- Biggest security companies based in Arlington, United States72
- Biggest security companies based in Berlin, Germany69
- Biggest security companies based in Columbia, United States66
- Biggest security companies based in Brisbane, Australia64
- Biggest security companies based in Reston, United States63
- Biggest security companies based in Charlotte, United States62
- Biggest security companies based in Denver, United States61
- Biggest security companies based in San Diego, United States61
- Biggest security companies based in Manchester, United Kingdom60
- Biggest security companies based in Karachi, Pakistan59
- Biggest security companies based in Mclean, United States58
- Biggest security companies based in San Antonio, United States58
- Biggest security companies based in Orlando, United States56
- Biggest security companies based in Alexandria, United States55
- Biggest security companies based in Las Vegas, United States55
- Biggest security companies based in Delhi, India53
- Biggest security companies based in Baltimore, United States52
- Biggest security companies based in Boston, United States52
- Biggest security companies based in Vancouver, Canada52
- Biggest security companies based in Cape Town, South Africa51
- Biggest security companies based in Phoenix, United States51
- Biggest security companies based in Brasilia, Brazil49
- Biggest security companies based in Canberra, Australia47
- Biggest security companies based in Mississauga, Canada46
- Biggest security companies based in Seattle, United States46
- Biggest security companies based in Ashburn, United States44
- Biggest security companies based in Raleigh, United States44
- Biggest security companies based in Herndon, United States43
- Biggest security companies based in Fairfax, United States41
- Biggest security companies based in Huntsville, United States41
- Biggest security companies based in Perth, Australia40
- Biggest security companies based in Belo Horizonte, Brazil39
- Biggest security companies based in Birmingham, United Kingdom38
- Biggest security companies based in Vienna, United States36
- Biggest security companies based in Edmonton, Canada35
- Biggest security companies based in San Jose, United States35
- Biggest security companies based in Wilmington, United States35
- Biggest security companies based in Pittsburgh, United States34
- Biggest security companies based in Portland, United States33
- Biggest security companies based in Scottsdale, United States33
- Biggest security companies based in Chantilly, United States32
- Biggest security companies based in Colorado Springs, United States31
- Biggest security companies based in Curitiba, Brazil31
- Biggest security companies based in Munich, Germany31
- Biggest security companies based in Minneapolis, United States30
- Biggest security companies based in Indianapolis, United States29
- Biggest security companies based in Richmond, United States29
- Biggest security companies based in Adelaide, Australia28
- Biggest security companies based in Columbus, United States28
- Biggest security companies based in Fort Lauderdale, United States27
- Biggest security companies based in Hamburg, Germany27
- Biggest security companies based in Irvine, United States27
- Biggest security companies based in Nashville, United States27
- Biggest security companies based in Plano, United States27
- Biggest security companies based in Porto Alegre, Brazil27
- Biggest security companies based in Barueri, Brazil26
- Biggest security companies based in Springfield, United States26
- Biggest security companies based in Dover, United States25
Questions about this company list
What does Exact match mean for biggest security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many biggest security companies did RevenueBase find worldwide?
The saved snapshot records 30,460 matching company records, 787,136 tracked contacts and 158,125 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 biggest security companies worldwide. Snapshot: September 21, 2026. https://revenuebase.ai/companies/browse/biggest-security-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗