Company lists · Data refreshed September 2026
Top 25 Critical infrastructure security companies worldwide
RevenueBase identified 14,494 company matches for critical infrastructure security companies worldwide as of September 2026 and tracks 455,585 professional contacts across them, including 72,486 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for critical infrastructure 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 27, 2026. Country and city lists for critical infrastructure 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 critical infrastructure security companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 27, 2026 · View company records in RevenueBase | |||||
| 2 | 38,634 contacts → | ||||
Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 3 | 12,771 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 4 | 9,697 contacts → | ||||
Exact match “MANTECH is more than a technology company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 5 | 6,335 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 6 | 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 27, 2026 · View company records in RevenueBase | |||||
| 7 | 4,530 contacts → | ||||
Exact match “A SegurPro é o próximo passo em segurança privada.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 8 | 4,038 contacts → | ||||
Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 9 | 3,673 contacts → | ||||
Exact match “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 10 | 3,592 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 11 | 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 27, 2026 · View company records in RevenueBase | |||||
| 12 | 3,004 contacts → | ||||
Exact match “Securitas is a global knowledge leader in security.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 13 | 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 27, 2026 · View company records in RevenueBase | |||||
| 14 | 2,165 contacts → | ||||
Exact match “Com mais de 8 mil colaboradores, presente em 11 estados, vencedora do Prêmio Valor Carreira por sete vezes consecutivas, certificada pela GPTW e única empresa brasileira membro do…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 15 | 1,949 contacts → | ||||
Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 16 | 1,813 contacts → | ||||
Exact match “At Wilson Security, we are committed to building a safer future for everyone.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 17 | 1,727 contacts → | ||||
Exact match “HSS is now Tarian!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 18 | 1,632 contacts → | ||||
Exact match “Over 90 years of protecting the things that matter, we’ve seen more than most.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 19 | 1,532 contacts → | ||||
Exact match “Leidos Dynetics provides responsive, cost-effective engineering, scientific, IT solutions to the national security, cybersecurity, space, and critical infrastructure sectors.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 20 | 1,455 contacts → | ||||
Exact match “ICTS Europe is Europe’s leading security specialist.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 21 | 1,419 contacts → | ||||
Exact match “See a different world.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 22 | 1,399 contacts → | ||||
Exact match “Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 23 | 1,378 contacts → | ||||
Exact match “We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 24 | 1,375 contacts → | ||||
Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase | |||||
| 25 | 1,374 contacts → | ||||
Exact match “First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Recorded in the RevenueBase company graph · Sep 27, 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 “critical infrastructure 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 14,494 critical infrastructure security companies worldwide
See the full list, filter by size, metro and specialty, and access 72,486 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Critical infrastructure security companies worldwide at a glance
As of Sep 27, 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 critical infrastructure security companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “critical infrastructure 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 72,486 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 27, 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.
Critical infrastructure security companies by location
103 lists · largest firstEvery Critical infrastructure security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Critical infrastructure security companies based in the United States3,610
- Critical infrastructure security companies based in the United Kingdom894
- Critical infrastructure security companies based in India884
- Critical infrastructure security companies based in France512
- Critical infrastructure security companies based in Brazil476
- Critical infrastructure security companies based in Australia469
- Critical infrastructure security companies based in Canada468
- Critical infrastructure security companies based in Germany335
- Critical infrastructure security companies based in Mexico264
- Critical infrastructure security companies based in the United Arab Emirates236
- Critical infrastructure security companies based in the Netherlands234
- Critical infrastructure security companies based in South Africa219
- Critical infrastructure security companies based in Spain217
- Critical infrastructure security companies based in Italy216
- Critical infrastructure security companies based in Colombia159
- Critical infrastructure security companies based in Argentina145
- Critical infrastructure security companies based in Chile145
- Critical infrastructure security companies based in Türkiye133
- Critical infrastructure security companies based in Israel126
- Critical infrastructure security companies based in Saudi Arabia117
- Critical infrastructure security companies based in Switzerland103
- Critical infrastructure security companies based in Peru101
- Critical infrastructure security companies based in Nigeria99
- Critical infrastructure security companies based in Belgium98
- Critical infrastructure security companies based in Sweden98
- Critical infrastructure security companies based in Pakistan94
- Critical infrastructure security companies based in Poland87
- Critical infrastructure security companies based in Indonesia71
- Critical infrastructure security companies based in Malaysia68
- Critical infrastructure security companies based in Kenya64
- Critical infrastructure security companies based in New Zealand62
- Critical infrastructure security companies based in Egypt61
- Critical infrastructure security companies based in Romania61
- Critical infrastructure security companies based in Ecuador50
- Critical infrastructure security companies based in Qatar50
- Critical infrastructure security companies based in Greece49
- Critical infrastructure security companies based in Ireland44
- Critical infrastructure security companies based in Czechia43
- Critical infrastructure security companies based in Portugal38
- Critical infrastructure security companies based in Ukraine38
- Critical infrastructure security companies based in Denmark37
- Critical infrastructure security companies based in Austria34
- Critical infrastructure security companies based in Hungary28
- Critical infrastructure security companies based in Finland27
- Critical infrastructure security companies based in Norway25
Cities
- Critical infrastructure security companies based in London, United Kingdom304
- Critical infrastructure security companies based in Sao Paulo, Brazil149
- Critical infrastructure security companies based in Dubai, United Arab Emirates134
- Critical infrastructure security companies based in Paris, France107
- Critical infrastructure security companies based in New York, United States101
- Critical infrastructure security companies based in Bangalore, India94
- Critical infrastructure security companies based in Toronto, Canada92
- Critical infrastructure security companies based in Houston, United States81
- Critical infrastructure security companies based in Washington, United States80
- Critical infrastructure security companies based in Melbourne, Australia77
- Critical infrastructure security companies based in New Delhi, India74
- Critical infrastructure security companies based in Sydney, Australia71
- Critical infrastructure security companies based in Hyderabad, India67
- Critical infrastructure security companies based in Riyadh, Saudi Arabia66
- Critical infrastructure security companies based in Los Angeles, United States59
- Critical infrastructure security companies based in Miami, United States59
- Critical infrastructure security companies based in Mumbai, India59
- Critical infrastructure security companies based in Pune, India58
- Critical infrastructure security companies based in Nairobi, Kenya57
- Critical infrastructure security companies based in Bogota, Colombia55
- Critical infrastructure security companies based in Madrid, Spain53
- Critical infrastructure security companies based in Atlanta, United States51
- Critical infrastructure security companies based in Chicago, United States49
- Critical infrastructure security companies based in Istanbul, Türkiye49
- Critical infrastructure security companies based in Dallas, United States48
- Critical infrastructure security companies based in Santiago, Chile47
- Critical infrastructure security companies based in Austin, United States45
- Critical infrastructure security companies based in Chennai, India45
- Critical infrastructure security companies based in Johannesburg, South Africa45
- Critical infrastructure security companies based in Montreal, Canada43
- Critical infrastructure security companies based in Stockholm, Sweden43
- Critical infrastructure security companies based in Berlin, Germany40
- Critical infrastructure security companies based in Ottawa, Canada40
- Critical infrastructure security companies based in Arlington, United States39
- Critical infrastructure security companies based in Columbia, United States37
- Critical infrastructure security companies based in Ahmedabad, India36
- Critical infrastructure security companies based in Tampa, United States35
- Critical infrastructure security companies based in Calgary, Canada34
- Critical infrastructure security companies based in Herndon, United States34
- Critical infrastructure security companies based in Rio De Janeiro, Brazil34
- Critical infrastructure security companies based in Alexandria, United States31
- Critical infrastructure security companies based in Brisbane, Australia31
- Critical infrastructure security companies based in Charlotte, United States31
- Critical infrastructure security companies based in Denver, United States31
- Critical infrastructure security companies based in Doha, Qatar30
- Critical infrastructure security companies based in Reston, United States28
- Critical infrastructure security companies based in San Francisco, United States28
- Critical infrastructure security companies based in Baltimore, United States27
- Critical infrastructure security companies based in Mclean, United States27
- Critical infrastructure security companies based in Perth, Australia27
- Critical infrastructure security companies based in San Antonio, United States27
- Critical infrastructure security companies based in Abu Dhabi, United Arab Emirates26
- Critical infrastructure security companies based in Quito, Ecuador26
- Critical infrastructure security companies based in Tel Aviv, Israel26
- Critical infrastructure security companies based in Warsaw, Poland26
- Critical infrastructure security companies based in Canberra, Australia25
- Critical infrastructure security companies based in Las Vegas, United States25
- Critical infrastructure security companies based in Phoenix, 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 “critical infrastructure security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many critical infrastructure security companies are there worldwide?
RevenueBase identified 14,494 company matches for critical infrastructure 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?
Allied Universal tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most critical infrastructure security companies?
The United States leads with 3,610 companies, followed by the United Kingdom (894) and India (884). Every critical infrastructure security companies list by country and city is linked on this page.
Which city has the most critical infrastructure security companies?
London leads with 309 company records, followed by Sao Paulo (149) and Dubai (134).
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 72,486 professional contacts with verified work emails tracked across these 14,494 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 27, 2026.
Ready to reach these companies? Verified emails and direct dials for all 14,494 critical infrastructure security companies worldwide. Start with a free account, no credit card.
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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 critical infrastructure 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 14,494 matching company records for critical infrastructure security companies worldwide, with 455,585 tracked contacts and 72,486 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 27, 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 critical infrastructure 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 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 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. | |||||
| 4 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  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. | |||||
| 6 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Security Segurança E Serviçossousecurity.com.brHQ: São Paulo, BrazilReported employees: 5,001-10,000 | São Paulo, Brazil | 5,001-10,000 | Exact match | 2,165 contacts → |
“Com mais de 8 mil colaboradores, presente em 11 estados, vencedora do Prêmio Valor Carreira por sete vezes consecutivas, certificada pela GPTW e única empresa brasileira membro do…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Paragon Systems INCparasys.comHQ: Herndon, VA, United StatesReported employees: 10001+ | Herndon, VA, United States | 10001+ | Exact match | 1,949 contacts → |
“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Wilson Securitywilsonsecurity.com.auHQ: Essendon Fields, AustraliaReported employees: 5,001-10,000 | Essendon Fields, Australia | 5,001-10,000 | Exact match | 1,813 contacts → |
“At Wilson Security, we are committed to building a safer future for everyone.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  HSStariangroup.comHQ: Denver, CO, United StatesReported employees: 5,001-10,000 | Denver, CO, United States | 5,001-10,000 | Exact match | 1,727 contacts → |
“HSS is now Tarian!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Securitas Canadasecuritas.caHQ: North York, ON, CanadaReported employees: 5,001-10,000 | North York, ON, Canada | 5,001-10,000 | Exact match | 1,632 contacts → |
“Over 90 years of protecting the things that matter, we’ve seen more than most.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Dynetics, INCleidos.comHQ: Huntsville, AL, United StatesReported employees: 10001+ | Huntsville, AL, United States | 10001+ | Exact match | 1,532 contacts → |
“Leidos Dynetics provides responsive, cost-effective engineering, scientific, IT solutions to the national security, cybersecurity, space, and critical infrastructure sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Icts Europeictseurope.comHQ: Bp12936, FranceReported employees: 10001+ | Bp12936, France | 10001+ | Exact match | 1,455 contacts → |
“ICTS Europe is Europe’s leading security specialist.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Securitas Belgiumsecuritas.beHQ: Diegem, BelgiumReported employees: 5,001-10,000 | Diegem, Belgium | 5,001-10,000 | Exact match | 1,419 contacts → |
“See a different world.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Weiser Security Services, INCweisersecurity.comHQ: New Orleans, LA, United StatesReported employees: 1,001-5,000 | New Orleans, LA, United States | 1,001-5,000 | Exact match | 1,399 contacts → |
“Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Site سايتsite.saHQ: Al Nakheel, Saudi ArabiaReported employees: 501-1,000 | Al Nakheel, Saudi Arabia | 501-1,000 | Exact match | 1,378 contacts → |
“We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Guardsmarkguardsmark.comHQ: New York, NY, United StatesReported employees: 10001+ | New York, NY, United States | 10001+ | Exact match | 1,375 contacts → |
“Guardsmark, LLC provides security services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  First Security Group LLCfirstsg.comHQ: Dubai, United Arab EmiratesReported employees: 5,001-10,000 | Dubai, United Arab Emirates | 5,001-10,000 | Exact match | 1,374 contacts → |
“First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 14,494 company matches
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Critical infrastructure security companies: dataset insights
September 27, 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
14,451 records in the displayed employee bands.
43 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 14,494 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 27, 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 ↗
Critical infrastructure security companies by location
103 lists · largest firstEvery Critical infrastructure security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Critical infrastructure security companies based in the United States3,610
- Critical infrastructure security companies based in the United Kingdom894
- Critical infrastructure security companies based in India884
- Critical infrastructure security companies based in France512
- Critical infrastructure security companies based in Brazil476
- Critical infrastructure security companies based in Australia469
- Critical infrastructure security companies based in Canada468
- Critical infrastructure security companies based in Germany335
- Critical infrastructure security companies based in Mexico264
- Critical infrastructure security companies based in the United Arab Emirates236
- Critical infrastructure security companies based in the Netherlands234
- Critical infrastructure security companies based in South Africa219
- Critical infrastructure security companies based in Spain217
- Critical infrastructure security companies based in Italy216
- Critical infrastructure security companies based in Colombia159
- Critical infrastructure security companies based in Argentina145
- Critical infrastructure security companies based in Chile145
- Critical infrastructure security companies based in Türkiye133
- Critical infrastructure security companies based in Israel126
- Critical infrastructure security companies based in Saudi Arabia117
- Critical infrastructure security companies based in Switzerland103
- Critical infrastructure security companies based in Peru101
- Critical infrastructure security companies based in Nigeria99
- Critical infrastructure security companies based in Belgium98
- Critical infrastructure security companies based in Sweden98
- Critical infrastructure security companies based in Pakistan94
- Critical infrastructure security companies based in Poland87
- Critical infrastructure security companies based in Indonesia71
- Critical infrastructure security companies based in Malaysia68
- Critical infrastructure security companies based in Kenya64
- Critical infrastructure security companies based in New Zealand62
- Critical infrastructure security companies based in Egypt61
- Critical infrastructure security companies based in Romania61
- Critical infrastructure security companies based in Ecuador50
- Critical infrastructure security companies based in Qatar50
- Critical infrastructure security companies based in Greece49
- Critical infrastructure security companies based in Ireland44
- Critical infrastructure security companies based in Czechia43
- Critical infrastructure security companies based in Portugal38
- Critical infrastructure security companies based in Ukraine38
- Critical infrastructure security companies based in Denmark37
- Critical infrastructure security companies based in Austria34
- Critical infrastructure security companies based in Hungary28
- Critical infrastructure security companies based in Finland27
- Critical infrastructure security companies based in Norway25
Cities
- Critical infrastructure security companies based in London, United Kingdom304
- Critical infrastructure security companies based in Sao Paulo, Brazil149
- Critical infrastructure security companies based in Dubai, United Arab Emirates134
- Critical infrastructure security companies based in Paris, France107
- Critical infrastructure security companies based in New York, United States101
- Critical infrastructure security companies based in Bangalore, India94
- Critical infrastructure security companies based in Toronto, Canada92
- Critical infrastructure security companies based in Houston, United States81
- Critical infrastructure security companies based in Washington, United States80
- Critical infrastructure security companies based in Melbourne, Australia77
- Critical infrastructure security companies based in New Delhi, India74
- Critical infrastructure security companies based in Sydney, Australia71
- Critical infrastructure security companies based in Hyderabad, India67
- Critical infrastructure security companies based in Riyadh, Saudi Arabia66
- Critical infrastructure security companies based in Los Angeles, United States59
- Critical infrastructure security companies based in Miami, United States59
- Critical infrastructure security companies based in Mumbai, India59
- Critical infrastructure security companies based in Pune, India58
- Critical infrastructure security companies based in Nairobi, Kenya57
- Critical infrastructure security companies based in Bogota, Colombia55
- Critical infrastructure security companies based in Madrid, Spain53
- Critical infrastructure security companies based in Atlanta, United States51
- Critical infrastructure security companies based in Chicago, United States49
- Critical infrastructure security companies based in Istanbul, Türkiye49
- Critical infrastructure security companies based in Dallas, United States48
- Critical infrastructure security companies based in Santiago, Chile47
- Critical infrastructure security companies based in Austin, United States45
- Critical infrastructure security companies based in Chennai, India45
- Critical infrastructure security companies based in Johannesburg, South Africa45
- Critical infrastructure security companies based in Montreal, Canada43
- Critical infrastructure security companies based in Stockholm, Sweden43
- Critical infrastructure security companies based in Berlin, Germany40
- Critical infrastructure security companies based in Ottawa, Canada40
- Critical infrastructure security companies based in Arlington, United States39
- Critical infrastructure security companies based in Columbia, United States37
- Critical infrastructure security companies based in Ahmedabad, India36
- Critical infrastructure security companies based in Tampa, United States35
- Critical infrastructure security companies based in Calgary, Canada34
- Critical infrastructure security companies based in Herndon, United States34
- Critical infrastructure security companies based in Rio De Janeiro, Brazil34
- Critical infrastructure security companies based in Alexandria, United States31
- Critical infrastructure security companies based in Brisbane, Australia31
- Critical infrastructure security companies based in Charlotte, United States31
- Critical infrastructure security companies based in Denver, United States31
- Critical infrastructure security companies based in Doha, Qatar30
- Critical infrastructure security companies based in Reston, United States28
- Critical infrastructure security companies based in San Francisco, United States28
- Critical infrastructure security companies based in Baltimore, United States27
- Critical infrastructure security companies based in Mclean, United States27
- Critical infrastructure security companies based in Perth, Australia27
- Critical infrastructure security companies based in San Antonio, United States27
- Critical infrastructure security companies based in Abu Dhabi, United Arab Emirates26
- Critical infrastructure security companies based in Quito, Ecuador26
- Critical infrastructure security companies based in Tel Aviv, Israel26
- Critical infrastructure security companies based in Warsaw, Poland26
- Critical infrastructure security companies based in Canberra, Australia25
- Critical infrastructure security companies based in Las Vegas, United States25
- Critical infrastructure security companies based in Phoenix, United States25
Questions about this company list
What does Exact match mean for critical infrastructure 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 critical infrastructure security companies did RevenueBase find worldwide?
The saved snapshot records 14,494 matching company records, 455,585 tracked contacts and 72,486 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 27, 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 critical infrastructure security companies worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/critical-infrastructure-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 critical infrastructure security companies worldwide
RevenueBase records 14,494 matching company records for critical infrastructure security companies worldwide, with 455,585 tracked contacts and 72,486 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 27, 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 critical infrastructure 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 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | 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. | |||||
| 4 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | 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. | |||||
| 6 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | 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 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Security Segurança E Serviçossousecurity.com.br HQ: São Paulo, BrazilReported employees: 5,001-10,000 | São Paulo, Brazil | 5,001-10,000 | Exact match | 2,165 contacts → |
“Com mais de 8 mil colaboradores, presente em 11 estados, vencedora do Prêmio Valor Carreira por sete vezes consecutivas, certificada pela GPTW e única empresa brasileira membro do…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Paragon Systems INCparasys.com HQ: Herndon, VA, United StatesReported employees: 10001+ | Herndon, VA, United States | 10001+ | Exact match | 1,949 contacts → |
“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Wilson Securitywilsonsecurity.com.au HQ: Essendon Fields, AustraliaReported employees: 5,001-10,000 | Essendon Fields, Australia | 5,001-10,000 | Exact match | 1,813 contacts → |
“At Wilson Security, we are committed to building a safer future for everyone.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | HSStariangroup.com HQ: Denver, CO, United StatesReported employees: 5,001-10,000 | Denver, CO, United States | 5,001-10,000 | Exact match | 1,727 contacts → |
“HSS is now Tarian!” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Securitas Canadasecuritas.ca HQ: North York, ON, CanadaReported employees: 5,001-10,000 | North York, ON, Canada | 5,001-10,000 | Exact match | 1,632 contacts → |
“Over 90 years of protecting the things that matter, we’ve seen more than most.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Dynetics, INCleidos.com HQ: Huntsville, AL, United StatesReported employees: 10001+ | Huntsville, AL, United States | 10001+ | Exact match | 1,532 contacts → |
“Leidos Dynetics provides responsive, cost-effective engineering, scientific, IT solutions to the national security, cybersecurity, space, and critical infrastructure sectors.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Icts Europeictseurope.com HQ: Bp12936, FranceReported employees: 10001+ | Bp12936, France | 10001+ | Exact match | 1,455 contacts → |
“ICTS Europe is Europe’s leading security specialist.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Securitas Belgiumsecuritas.be HQ: Diegem, BelgiumReported employees: 5,001-10,000 | Diegem, Belgium | 5,001-10,000 | Exact match | 1,419 contacts → |
“See a different world.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Weiser Security Services, INCweisersecurity.com HQ: New Orleans, LA, United StatesReported employees: 1,001-5,000 | New Orleans, LA, United States | 1,001-5,000 | Exact match | 1,399 contacts → |
“Weiser Security Services is the 11th largest security service provider in the U.S.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Site سايتsite.sa HQ: Al Nakheel, Saudi ArabiaReported employees: 501-1,000 | Al Nakheel, Saudi Arabia | 501-1,000 | Exact match | 1,378 contacts → |
“We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Guardsmarkguardsmark.com HQ: New York, NY, United StatesReported employees: 10001+ | New York, NY, United States | 10001+ | Exact match | 1,375 contacts → |
“Guardsmark, LLC provides security services.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | First Security Group LLCfirstsg.com HQ: Dubai, United Arab EmiratesReported employees: 5,001-10,000 | Dubai, United Arab Emirates | 5,001-10,000 | Exact match | 1,374 contacts → |
“First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Recorded description excerpt · September 27, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 14,494 company matches
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Critical infrastructure security companies: dataset insights
September 27, 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
14,451 records in the displayed employee bands.
43 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 14,494 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 27, 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 ↗
Critical infrastructure security companies by location
103 lists · largest firstEvery Critical infrastructure security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Critical infrastructure security companies based in the United States3,610
- Critical infrastructure security companies based in the United Kingdom894
- Critical infrastructure security companies based in India884
- Critical infrastructure security companies based in France512
- Critical infrastructure security companies based in Brazil476
- Critical infrastructure security companies based in Australia469
- Critical infrastructure security companies based in Canada468
- Critical infrastructure security companies based in Germany335
- Critical infrastructure security companies based in Mexico264
- Critical infrastructure security companies based in the United Arab Emirates236
- Critical infrastructure security companies based in the Netherlands234
- Critical infrastructure security companies based in South Africa219
- Critical infrastructure security companies based in Spain217
- Critical infrastructure security companies based in Italy216
- Critical infrastructure security companies based in Colombia159
- Critical infrastructure security companies based in Argentina145
- Critical infrastructure security companies based in Chile145
- Critical infrastructure security companies based in Türkiye133
- Critical infrastructure security companies based in Israel126
- Critical infrastructure security companies based in Saudi Arabia117
- Critical infrastructure security companies based in Switzerland103
- Critical infrastructure security companies based in Peru101
- Critical infrastructure security companies based in Nigeria99
- Critical infrastructure security companies based in Belgium98
- Critical infrastructure security companies based in Sweden98
- Critical infrastructure security companies based in Pakistan94
- Critical infrastructure security companies based in Poland87
- Critical infrastructure security companies based in Indonesia71
- Critical infrastructure security companies based in Malaysia68
- Critical infrastructure security companies based in Kenya64
- Critical infrastructure security companies based in New Zealand62
- Critical infrastructure security companies based in Egypt61
- Critical infrastructure security companies based in Romania61
- Critical infrastructure security companies based in Ecuador50
- Critical infrastructure security companies based in Qatar50
- Critical infrastructure security companies based in Greece49
- Critical infrastructure security companies based in Ireland44
- Critical infrastructure security companies based in Czechia43
- Critical infrastructure security companies based in Portugal38
- Critical infrastructure security companies based in Ukraine38
- Critical infrastructure security companies based in Denmark37
- Critical infrastructure security companies based in Austria34
- Critical infrastructure security companies based in Hungary28
- Critical infrastructure security companies based in Finland27
- Critical infrastructure security companies based in Norway25
Cities
- Critical infrastructure security companies based in London, United Kingdom304
- Critical infrastructure security companies based in Sao Paulo, Brazil149
- Critical infrastructure security companies based in Dubai, United Arab Emirates134
- Critical infrastructure security companies based in Paris, France107
- Critical infrastructure security companies based in New York, United States101
- Critical infrastructure security companies based in Bangalore, India94
- Critical infrastructure security companies based in Toronto, Canada92
- Critical infrastructure security companies based in Houston, United States81
- Critical infrastructure security companies based in Washington, United States80
- Critical infrastructure security companies based in Melbourne, Australia77
- Critical infrastructure security companies based in New Delhi, India74
- Critical infrastructure security companies based in Sydney, Australia71
- Critical infrastructure security companies based in Hyderabad, India67
- Critical infrastructure security companies based in Riyadh, Saudi Arabia66
- Critical infrastructure security companies based in Los Angeles, United States59
- Critical infrastructure security companies based in Miami, United States59
- Critical infrastructure security companies based in Mumbai, India59
- Critical infrastructure security companies based in Pune, India58
- Critical infrastructure security companies based in Nairobi, Kenya57
- Critical infrastructure security companies based in Bogota, Colombia55
- Critical infrastructure security companies based in Madrid, Spain53
- Critical infrastructure security companies based in Atlanta, United States51
- Critical infrastructure security companies based in Chicago, United States49
- Critical infrastructure security companies based in Istanbul, Türkiye49
- Critical infrastructure security companies based in Dallas, United States48
- Critical infrastructure security companies based in Santiago, Chile47
- Critical infrastructure security companies based in Austin, United States45
- Critical infrastructure security companies based in Chennai, India45
- Critical infrastructure security companies based in Johannesburg, South Africa45
- Critical infrastructure security companies based in Montreal, Canada43
- Critical infrastructure security companies based in Stockholm, Sweden43
- Critical infrastructure security companies based in Berlin, Germany40
- Critical infrastructure security companies based in Ottawa, Canada40
- Critical infrastructure security companies based in Arlington, United States39
- Critical infrastructure security companies based in Columbia, United States37
- Critical infrastructure security companies based in Ahmedabad, India36
- Critical infrastructure security companies based in Tampa, United States35
- Critical infrastructure security companies based in Calgary, Canada34
- Critical infrastructure security companies based in Herndon, United States34
- Critical infrastructure security companies based in Rio De Janeiro, Brazil34
- Critical infrastructure security companies based in Alexandria, United States31
- Critical infrastructure security companies based in Brisbane, Australia31
- Critical infrastructure security companies based in Charlotte, United States31
- Critical infrastructure security companies based in Denver, United States31
- Critical infrastructure security companies based in Doha, Qatar30
- Critical infrastructure security companies based in Reston, United States28
- Critical infrastructure security companies based in San Francisco, United States28
- Critical infrastructure security companies based in Baltimore, United States27
- Critical infrastructure security companies based in Mclean, United States27
- Critical infrastructure security companies based in Perth, Australia27
- Critical infrastructure security companies based in San Antonio, United States27
- Critical infrastructure security companies based in Abu Dhabi, United Arab Emirates26
- Critical infrastructure security companies based in Quito, Ecuador26
- Critical infrastructure security companies based in Tel Aviv, Israel26
- Critical infrastructure security companies based in Warsaw, Poland26
- Critical infrastructure security companies based in Canberra, Australia25
- Critical infrastructure security companies based in Las Vegas, United States25
- Critical infrastructure security companies based in Phoenix, United States25
Questions about this company list
What does Exact match mean for critical infrastructure 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 critical infrastructure security companies did RevenueBase find worldwide?
The saved snapshot records 14,494 matching company records, 455,585 tracked contacts and 72,486 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 27, 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 critical infrastructure security companies worldwide. Snapshot: September 27, 2026. https://revenuebase.ai/companies/browse/critical-infrastructure-security-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗