Company lists · Data refreshed September 2026
Top 25 Big security companies worldwide
RevenueBase identified 30,301 company matches for big security companies worldwide as of September 2026 and tracks 955,633 professional contacts across them, including 93,927 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for big 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 big 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 big 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 | 62,804 contacts → | ||||
Exact match “Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 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 | |||||
| 4 | 38,634 contacts → | ||||
Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 17,041 contacts → | ||||
Exact match “GardaWorld is the world’s largest privately-owned security services company, offering cash services, physical and specialized security solutions, and with our Crisis24 portal, the…” 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 | 7,986 contacts → | ||||
Exact match “One of the largest companies in the professional services and security markets in Brazil.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 6,335 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 5,384 contacts → | ||||
Exact match “Tyco offers comprehensive security solutions to protect people, facilities, and assets as part of Johnson Controls world leading portfolio of building products, technologies…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 4,835 contacts → | ||||
Exact match “As one of Canada’s Best Managed Companies, boasting Canada’s 10 Most Admired Corporate Cultures, Paladin is Canada’s leading security company, with services and superior expertise…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 4,610 contacts → | ||||
Exact match “Certis is a leading advanced integrated security organisation that develops and delivers multi-disciplinary smart security and integrated services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 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 | |||||
| 13 | 4,530 contacts → | ||||
Exact match “A SegurPro é o próximo passo em segurança privada.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 4,292 contacts → | ||||
Exact match “O que é trabalhar no Grupo Haganá?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 4,038 contacts → | ||||
Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 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 | |||||
| 17 | 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 | |||||
| 18 | 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 | |||||
| 19 | 3,612 contacts → | ||||
Exact match “EVERYWHERE SECURITY MATTERS.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 3,592 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 3,480 contacts → | ||||
Exact match “Fidelity Services Group is Southern Africa’s largest integrated security solutions provider and the industry leader in protection innovation.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 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 | |||||
| 23 | 3,140 contacts → | ||||
Exact match “Somos la empresa de seguridad de mayor prestigio en el Perú" Comenzamos en el año 1989, con solo 4 hombres de Seguridad, que creyeron en nuestro estilo de liderazgo y decidieron…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 3,106 contacts → | ||||
Exact match “Specialist Security Company offering worldwide protection services to a niche` market of VIP's and travelling executives.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 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 | |||||
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 “big 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 30,301 big security companies worldwide
See the full list, filter by size, metro and specialty, and access 93,927 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Big 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 big security companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “big 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 93,927 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.
Big security companies by location
112 lists · largest firstEvery Big security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Big security companies based in the United States6,039
- Big security companies based in the United Kingdom2,594
- Big security companies based in Brazil1,763
- Big security companies based in India1,565
- Big security companies based in France1,372
- Big security companies based in Canada998
- Big security companies based in Germany984
- Big security companies based in Australia758
- Big security companies based in the Netherlands683
- Big security companies based in Italy668
- Big security companies based in Mexico615
- Big security companies based in South Africa609
- Big security companies based in Spain517
- Big security companies based in Argentina410
- Big security companies based in Colombia364
- Big security companies based in the United Arab Emirates321
- Big security companies based in Chile303
- Big security companies based in Belgium279
- Big security companies based in Türkiye257
- Big security companies based in Peru245
- Big security companies based in Switzerland226
- Big security companies based in Sweden212
- Big security companies based in Nigeria181
- Big security companies based in Poland164
- Big security companies based in Pakistan156
- Big security companies based in Saudi Arabia153
- Big security companies based in Ecuador147
- Big security companies based in Kenya141
- Big security companies based in Malaysia141
- Big security companies based in Romania127
- Big security companies based in Egypt116
- Big security companies based in Ireland116
- Big security companies based in Indonesia115
- Big security companies based in Singapore113
- Big security companies based in Portugal105
- Big security companies based in Denmark102
- Big security companies based in New Zealand101
- Big security companies based in the Philippines92
- Big security companies based in Israel89
- Big security companies based in Czechia83
- Big security companies based in Greece81
- Big security companies based in Austria69
- Big security companies based in Qatar66
- Big security companies based in Hungary65
- Big security companies based in Norway65
- Big security companies based in the Dominican Republic53
- Big security companies based in Finland48
- Big security companies based in Uruguay44
- Big security companies based in Panama32
- Big security companies based in Serbia31
- Big security companies based in Thailand31
- Big security companies based in Cyprus29
- Big security companies based in Croatia26
Cities
- Big security companies based in London, United Kingdom630
- Big security companies based in Sao Paulo, Brazil376
- Big security companies based in New York, United States158
- Big security companies based in Bangalore, India145
- Big security companies based in Toronto, Canada144
- Big security companies based in Los Angeles, United States143
- Big security companies based in Houston, United States139
- Big security companies based in New Delhi, India131
- Big security companies based in Miami, United States119
- Big security companies based in Mumbai, India111
- Big security companies based in Johannesburg, South Africa105
- Big security companies based in Dallas, United States89
- Big security companies based in Rio De Janeiro, Brazil88
- Big security companies based in Melbourne, Australia86
- Big security companies based in Pune, India80
- Big security companies based in Chicago, United States77
- Big security companies based in Sydney, Australia76
- Big security companies based in Noida, India66
- Big security companies based in Atlanta, United States65
- Big security companies based in Birmingham, United Kingdom65
- Big security companies based in Austin, United States62
- Big security companies based in Ahmedabad, India61
- Big security companies based in Hyderabad, India60
- Big security companies based in Manchester, United Kingdom60
- Big security companies based in Curitiba, Brazil59
- Big security companies based in Calgary, Canada58
- Big security companies based in Belo Horizonte, Brazil56
- Big security companies based in Chennai, India56
- Big security companies based in Cape Town, South Africa55
- Big security companies based in Montreal, Canada55
- Big security companies based in Tampa, United States52
- Big security companies based in Denver, United States50
- Big security companies based in Phoenix, United States50
- Big security companies based in Washington, United States50
- Big security companies based in Las Vegas, United States49
- Big security companies based in Mississauga, Canada47
- Big security companies based in Porto Alegre, Brazil47
- Big security companies based in San Diego, United States45
- Big security companies based in Charlotte, United States44
- Big security companies based in Edmonton, Canada44
- Big security companies based in Pretoria, South Africa44
- Big security companies based in Vancouver, Canada42
- Big security companies based in Ottawa, Canada41
- Big security companies based in San Antonio, United States38
- Big security companies based in Baltimore, United States36
- Big security companies based in San Francisco, United States36
- Big security companies based in Gurgaon, India35
- Big security companies based in San Jose, United States35
- Big security companies based in Indianapolis, United States32
- Big security companies based in Perth, Australia30
- Big security companies based in Brisbane, Australia29
- Big security companies based in Columbia, United States29
- Big security companies based in Liverpool, United Kingdom29
- Big security companies based in Seattle, United States29
- Big security companies based in Sacramento, United States28
- Big security companies based in Arlington, United States27
- Big security companies based in Portland, United States27
- Big security companies based in Nashville, United States26
- Big security companies based in Boston, 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 “big security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many big security companies are there worldwide?
RevenueBase identified 30,301 company matches for big 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 big security companies?
The United States leads with 6,039 companies, followed by the United Kingdom (2,594) and Brazil (1,763). Every big security companies list by country and city is linked on this page.
Which city has the most big security companies?
London leads with 645 company records, followed by Sao Paulo (376) and Dubai (178).
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 93,927 professional contacts with verified work emails tracked across these 30,301 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.
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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 big 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 30,301 matching company records for big security companies worldwide, with 955,633 tracked contacts and 93,927 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 big 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 |  Allied Universalaus.comHQ: Irvine, CA, United StatesReported employees: 10001+ | Irvine, CA, United States | 10001+ | Exact match | 62,804 contacts → |
“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  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. | |||||
| 4 |  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. | |||||
| 5 |  Gardaworldgarda.comHQ: Saint-laurent, CanadaReported employees: 10001+ | Saint-laurent, Canada | 10001+ | Exact match | 17,041 contacts → |
“GardaWorld is the world’s largest privately-owned security services company, offering cash services, physical and specialized security solutions, and with our Crisis24 portal, the…” 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 |  Gocil Tecnologia EM Segurança E Serviçosgocil.com.brHQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 7,986 contacts → |
“One of the largest companies in the professional services and security markets in Brazil.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  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. | |||||
| 9 |  TYCOtyco.comHQ: Cork, IrelandReported employees: 10001+ | Cork, Ireland | 10001+ | Exact match | 5,384 contacts → |
“Tyco offers comprehensive security solutions to protect people, facilities, and assets as part of Johnson Controls world leading portfolio of building products, technologies…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Paladin Security Group LTDpaladinsecurity.comHQ: Burnaby, BC, CanadaReported employees: 10001+ | Burnaby, BC, Canada | 10001+ | Exact match | 4,835 contacts → |
“As one of Canada’s Best Managed Companies, boasting Canada’s 10 Most Admired Corporate Cultures, Paladin is Canada’s leading security company, with services and superior expertise…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Certiscertisgroup.comHQ: SingaporeReported employees: 10001+ | Singapore | 10001+ | Exact match | 4,610 contacts → |
“Certis is a leading advanced integrated security organisation that develops and delivers multi-disciplinary smart security and integrated services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  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. | |||||
| 13 |  Segurprosegurpro.com.brHQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 4,530 contacts → |
“A SegurPro é o próximo passo em segurança privada.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Grupo Haganáhagana.com.brHQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 4,292 contacts → |
“O que é trabalhar no Grupo Haganá?” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Unemployedexcelsiordefense.com HQ: St. Petersburg, FL, United StatesReported employees: Not recorded | St. Petersburg, FL, United States | Not recorded | Exact match | 4,038 contacts → |
“Excelsior Defense is a security and investigations company based out of St.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  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. | |||||
| 17 |  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. | |||||
| 18 |  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. | |||||
| 19 |  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. | |||||
| 20 |  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. | |||||
| 21 | Fidelity Services Groupfidelity-services.com HQ: South AfricaReported employees: 10001+ | South Africa | 10001+ | Exact match | 3,480 contacts → |
“Fidelity Services Group is Southern Africa’s largest integrated security solutions provider and the industry leader in protection innovation.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  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. | |||||
| 23 |  Lidermanliderman.com.peHQ: Lima, PeruReported employees: 10001+ | Lima, Peru | 10001+ | Exact match | 3,140 contacts → |
“Somos la empresa de seguridad de mayor prestigio en el Perú" Comenzamos en el año 1989, con solo 4 hombres de Seguridad, que creyeron en nuestro estilo de liderazgo y decidieron…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | SSIsecurityservicesinternational.co.uk HQ: United KingdomReported employees: Not recorded | United Kingdom | Not recorded | Exact match | 3,106 contacts → |
“Specialist Security Company offering worldwide protection services to a niche` market of VIP's and travelling executives.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  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. | |||||
Showing 25 of 30,301 company matches
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Big 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
30,098 records in the displayed employee bands.
203 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 30,301 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 ↗
Big security companies by location
112 lists · largest firstEvery Big security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Big security companies based in the United States6,039
- Big security companies based in the United Kingdom2,594
- Big security companies based in Brazil1,763
- Big security companies based in India1,565
- Big security companies based in France1,372
- Big security companies based in Canada998
- Big security companies based in Germany984
- Big security companies based in Australia758
- Big security companies based in the Netherlands683
- Big security companies based in Italy668
- Big security companies based in Mexico615
- Big security companies based in South Africa609
- Big security companies based in Spain517
- Big security companies based in Argentina410
- Big security companies based in Colombia364
- Big security companies based in the United Arab Emirates321
- Big security companies based in Chile303
- Big security companies based in Belgium279
- Big security companies based in Türkiye257
- Big security companies based in Peru245
- Big security companies based in Switzerland226
- Big security companies based in Sweden212
- Big security companies based in Nigeria181
- Big security companies based in Poland164
- Big security companies based in Pakistan156
- Big security companies based in Saudi Arabia153
- Big security companies based in Ecuador147
- Big security companies based in Kenya141
- Big security companies based in Malaysia141
- Big security companies based in Romania127
- Big security companies based in Egypt116
- Big security companies based in Ireland116
- Big security companies based in Indonesia115
- Big security companies based in Singapore113
- Big security companies based in Portugal105
- Big security companies based in Denmark102
- Big security companies based in New Zealand101
- Big security companies based in the Philippines92
- Big security companies based in Israel89
- Big security companies based in Czechia83
- Big security companies based in Greece81
- Big security companies based in Austria69
- Big security companies based in Qatar66
- Big security companies based in Hungary65
- Big security companies based in Norway65
- Big security companies based in the Dominican Republic53
- Big security companies based in Finland48
- Big security companies based in Uruguay44
- Big security companies based in Panama32
- Big security companies based in Serbia31
- Big security companies based in Thailand31
- Big security companies based in Cyprus29
- Big security companies based in Croatia26
Cities
- Big security companies based in London, United Kingdom630
- Big security companies based in Sao Paulo, Brazil376
- Big security companies based in New York, United States158
- Big security companies based in Bangalore, India145
- Big security companies based in Toronto, Canada144
- Big security companies based in Los Angeles, United States143
- Big security companies based in Houston, United States139
- Big security companies based in New Delhi, India131
- Big security companies based in Miami, United States119
- Big security companies based in Mumbai, India111
- Big security companies based in Johannesburg, South Africa105
- Big security companies based in Dallas, United States89
- Big security companies based in Rio De Janeiro, Brazil88
- Big security companies based in Melbourne, Australia86
- Big security companies based in Pune, India80
- Big security companies based in Chicago, United States77
- Big security companies based in Sydney, Australia76
- Big security companies based in Noida, India66
- Big security companies based in Atlanta, United States65
- Big security companies based in Birmingham, United Kingdom65
- Big security companies based in Austin, United States62
- Big security companies based in Ahmedabad, India61
- Big security companies based in Hyderabad, India60
- Big security companies based in Manchester, United Kingdom60
- Big security companies based in Curitiba, Brazil59
- Big security companies based in Calgary, Canada58
- Big security companies based in Belo Horizonte, Brazil56
- Big security companies based in Chennai, India56
- Big security companies based in Cape Town, South Africa55
- Big security companies based in Montreal, Canada55
- Big security companies based in Tampa, United States52
- Big security companies based in Denver, United States50
- Big security companies based in Phoenix, United States50
- Big security companies based in Washington, United States50
- Big security companies based in Las Vegas, United States49
- Big security companies based in Mississauga, Canada47
- Big security companies based in Porto Alegre, Brazil47
- Big security companies based in San Diego, United States45
- Big security companies based in Charlotte, United States44
- Big security companies based in Edmonton, Canada44
- Big security companies based in Pretoria, South Africa44
- Big security companies based in Vancouver, Canada42
- Big security companies based in Ottawa, Canada41
- Big security companies based in San Antonio, United States38
- Big security companies based in Baltimore, United States36
- Big security companies based in San Francisco, United States36
- Big security companies based in Gurgaon, India35
- Big security companies based in San Jose, United States35
- Big security companies based in Indianapolis, United States32
- Big security companies based in Perth, Australia30
- Big security companies based in Brisbane, Australia29
- Big security companies based in Columbia, United States29
- Big security companies based in Liverpool, United Kingdom29
- Big security companies based in Seattle, United States29
- Big security companies based in Sacramento, United States28
- Big security companies based in Arlington, United States27
- Big security companies based in Portland, United States27
- Big security companies based in Nashville, United States26
- Big security companies based in Boston, United States25
Questions about this company list
What does Exact match mean for big 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 big security companies did RevenueBase find worldwide?
The saved snapshot records 30,301 matching company records, 955,633 tracked contacts and 93,927 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 big security companies worldwide. Snapshot: September 21, 2026. https://revenuebase.ai/companies/browse/big-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 big security companies worldwide
RevenueBase records 30,301 matching company records for big security companies worldwide, with 955,633 tracked contacts and 93,927 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 big 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 | Allied Universalaus.com HQ: Irvine, CA, United StatesReported employees: 10001+ | Irvine, CA, United States | 10001+ | Exact match | 62,804 contacts → |
“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 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. | |||||
| 4 | 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. | |||||
| 5 | Gardaworldgarda.com HQ: Saint-laurent, CanadaReported employees: 10001+ | Saint-laurent, Canada | 10001+ | Exact match | 17,041 contacts → |
“GardaWorld is the world’s largest privately-owned security services company, offering cash services, physical and specialized security solutions, and with our Crisis24 portal, the…” 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 | Gocil Tecnologia EM Segurança E Serviçosgocil.com.br HQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 7,986 contacts → |
“One of the largest companies in the professional services and security markets in Brazil.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | 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. | |||||
| 9 | TYCOtyco.com HQ: Cork, IrelandReported employees: 10001+ | Cork, Ireland | 10001+ | Exact match | 5,384 contacts → |
“Tyco offers comprehensive security solutions to protect people, facilities, and assets as part of Johnson Controls world leading portfolio of building products, technologies…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Paladin Security Group LTDpaladinsecurity.com HQ: Burnaby, BC, CanadaReported employees: 10001+ | Burnaby, BC, Canada | 10001+ | Exact match | 4,835 contacts → |
“As one of Canada’s Best Managed Companies, boasting Canada’s 10 Most Admired Corporate Cultures, Paladin is Canada’s leading security company, with services and superior expertise…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Certiscertisgroup.com HQ: SingaporeReported employees: 10001+ | Singapore | 10001+ | Exact match | 4,610 contacts → |
“Certis is a leading advanced integrated security organisation that develops and delivers multi-disciplinary smart security and integrated services.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | 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. | |||||
| 13 | Segurprosegurpro.com.br HQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 4,530 contacts → |
“A SegurPro é o próximo passo em segurança privada.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Grupo Haganáhagana.com.br HQ: Sao Paulo, BrazilReported employees: 10001+ | Sao Paulo, Brazil | 10001+ | Exact match | 4,292 contacts → |
“O que é trabalhar no Grupo Haganá?” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Unemployedexcelsiordefense.com HQ: St. Petersburg, FL, United StatesReported employees: Not recorded | St. Petersburg, FL, United States | Not recorded | Exact match | 4,038 contacts → |
“Excelsior Defense is a security and investigations company based out of St.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | 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. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | 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. | |||||
| 20 | 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. | |||||
| 21 | Fidelity Services Groupfidelity-services.com HQ: South AfricaReported employees: 10001+ | South Africa | 10001+ | Exact match | 3,480 contacts → |
“Fidelity Services Group is Southern Africa’s largest integrated security solutions provider and the industry leader in protection innovation.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | 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. | |||||
| 23 | Lidermanliderman.com.pe HQ: Lima, PeruReported employees: 10001+ | Lima, Peru | 10001+ | Exact match | 3,140 contacts → |
“Somos la empresa de seguridad de mayor prestigio en el Perú" Comenzamos en el año 1989, con solo 4 hombres de Seguridad, que creyeron en nuestro estilo de liderazgo y decidieron…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | SSIsecurityservicesinternational.co.uk HQ: United KingdomReported employees: Not recorded | United Kingdom | Not recorded | Exact match | 3,106 contacts → |
“Specialist Security Company offering worldwide protection services to a niche` market of VIP's and travelling executives.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | 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. | |||||
Showing 25 of 30,301 company matches
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Big 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
30,098 records in the displayed employee bands.
203 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 30,301 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 ↗
Big security companies by location
112 lists · largest firstEvery Big security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Big security companies based in the United States6,039
- Big security companies based in the United Kingdom2,594
- Big security companies based in Brazil1,763
- Big security companies based in India1,565
- Big security companies based in France1,372
- Big security companies based in Canada998
- Big security companies based in Germany984
- Big security companies based in Australia758
- Big security companies based in the Netherlands683
- Big security companies based in Italy668
- Big security companies based in Mexico615
- Big security companies based in South Africa609
- Big security companies based in Spain517
- Big security companies based in Argentina410
- Big security companies based in Colombia364
- Big security companies based in the United Arab Emirates321
- Big security companies based in Chile303
- Big security companies based in Belgium279
- Big security companies based in Türkiye257
- Big security companies based in Peru245
- Big security companies based in Switzerland226
- Big security companies based in Sweden212
- Big security companies based in Nigeria181
- Big security companies based in Poland164
- Big security companies based in Pakistan156
- Big security companies based in Saudi Arabia153
- Big security companies based in Ecuador147
- Big security companies based in Kenya141
- Big security companies based in Malaysia141
- Big security companies based in Romania127
- Big security companies based in Egypt116
- Big security companies based in Ireland116
- Big security companies based in Indonesia115
- Big security companies based in Singapore113
- Big security companies based in Portugal105
- Big security companies based in Denmark102
- Big security companies based in New Zealand101
- Big security companies based in the Philippines92
- Big security companies based in Israel89
- Big security companies based in Czechia83
- Big security companies based in Greece81
- Big security companies based in Austria69
- Big security companies based in Qatar66
- Big security companies based in Hungary65
- Big security companies based in Norway65
- Big security companies based in the Dominican Republic53
- Big security companies based in Finland48
- Big security companies based in Uruguay44
- Big security companies based in Panama32
- Big security companies based in Serbia31
- Big security companies based in Thailand31
- Big security companies based in Cyprus29
- Big security companies based in Croatia26
Cities
- Big security companies based in London, United Kingdom630
- Big security companies based in Sao Paulo, Brazil376
- Big security companies based in New York, United States158
- Big security companies based in Bangalore, India145
- Big security companies based in Toronto, Canada144
- Big security companies based in Los Angeles, United States143
- Big security companies based in Houston, United States139
- Big security companies based in New Delhi, India131
- Big security companies based in Miami, United States119
- Big security companies based in Mumbai, India111
- Big security companies based in Johannesburg, South Africa105
- Big security companies based in Dallas, United States89
- Big security companies based in Rio De Janeiro, Brazil88
- Big security companies based in Melbourne, Australia86
- Big security companies based in Pune, India80
- Big security companies based in Chicago, United States77
- Big security companies based in Sydney, Australia76
- Big security companies based in Noida, India66
- Big security companies based in Atlanta, United States65
- Big security companies based in Birmingham, United Kingdom65
- Big security companies based in Austin, United States62
- Big security companies based in Ahmedabad, India61
- Big security companies based in Hyderabad, India60
- Big security companies based in Manchester, United Kingdom60
- Big security companies based in Curitiba, Brazil59
- Big security companies based in Calgary, Canada58
- Big security companies based in Belo Horizonte, Brazil56
- Big security companies based in Chennai, India56
- Big security companies based in Cape Town, South Africa55
- Big security companies based in Montreal, Canada55
- Big security companies based in Tampa, United States52
- Big security companies based in Denver, United States50
- Big security companies based in Phoenix, United States50
- Big security companies based in Washington, United States50
- Big security companies based in Las Vegas, United States49
- Big security companies based in Mississauga, Canada47
- Big security companies based in Porto Alegre, Brazil47
- Big security companies based in San Diego, United States45
- Big security companies based in Charlotte, United States44
- Big security companies based in Edmonton, Canada44
- Big security companies based in Pretoria, South Africa44
- Big security companies based in Vancouver, Canada42
- Big security companies based in Ottawa, Canada41
- Big security companies based in San Antonio, United States38
- Big security companies based in Baltimore, United States36
- Big security companies based in San Francisco, United States36
- Big security companies based in Gurgaon, India35
- Big security companies based in San Jose, United States35
- Big security companies based in Indianapolis, United States32
- Big security companies based in Perth, Australia30
- Big security companies based in Brisbane, Australia29
- Big security companies based in Columbia, United States29
- Big security companies based in Liverpool, United Kingdom29
- Big security companies based in Seattle, United States29
- Big security companies based in Sacramento, United States28
- Big security companies based in Arlington, United States27
- Big security companies based in Portland, United States27
- Big security companies based in Nashville, United States26
- Big security companies based in Boston, United States25
Questions about this company list
What does Exact match mean for big 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 big security companies did RevenueBase find worldwide?
The saved snapshot records 30,301 matching company records, 955,633 tracked contacts and 93,927 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 big security companies worldwide. Snapshot: September 21, 2026. https://revenuebase.ai/companies/browse/big-security-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗