Company lists · Data refreshed September 2026

Top 25 Top 10 security companies worldwide

Name: Top 10 security companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 21,927 companies tracked

RevenueBase identified 21,927 company matches for top 10 security companies worldwide as of September 2026 and tracks 621,151 professional contacts across them, including 81,098 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for top 10 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 top 10 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

21,927Companies

621,151Contacts tracked

81,098Verified emails

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The 25 largest top 10 security companies worldwide

Ranked by team size

Top 25 of 21,927 company matches for top 10 security companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	G4s	Exact match	London, United KingdomHQ recorded Sep 21, 2026	10001+	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	Prosegur	Exact match	Madrid, SpainHQ recorded Sep 21, 2026	10001+	40,747 contacts →
	Exact match “50 Years of Excellence: Experience, Innovation, and Commitment to Safety.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Securitas Security Services Usa, INC	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 21, 2026	10001+	38,634 contacts →
	Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Private Sector	Exact match	United StatesHQ recorded Sep 21, 2026	n/a	12,771 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Securitas Group	Exact match	Stockholm, SwedenHQ recorded Sep 21, 2026	10001+	6,335 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	TYCO	Exact match	Cork, IrelandHQ recorded Sep 21, 2026	10001+	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
7	Sophos	Exact match	Abingdon, United KingdomHQ recorded Sep 21, 2026	5,001-10,000	4,925 contacts →
	Exact match “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Certis	Exact match	SingaporeHQ recorded Sep 21, 2026	10001+	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
9	Segurpro	Exact match	Sao Paulo, BrazilHQ recorded Sep 21, 2026	10001+	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
10	Alliedbarton Security Services	Exact match	Santa Ana, United StatesHQ recorded Sep 21, 2026	10001+	4,358 contacts →
	Exact match “We've merged!” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Unemployed	Exact match	St. Petersburg, FL, United StatesHQ recorded Sep 21, 2026	n/a	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
12	Securitas France	Exact match	Issy-les-moulineaux, FranceHQ recorded Sep 21, 2026	10001+	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
13	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Sep 21, 2026	1,001-5,000	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
14	Securitas Seguridad España	Exact match	Madrid, SpainHQ recorded Sep 21, 2026	10001+	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
15	U.S. Security Associates, INC	Exact match	Roswell, GA, United StatesHQ recorded Sep 21, 2026	10001+	3,592 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Sicuritalia S.P.A	Exact match	Milano, ItalyHQ recorded Sep 21, 2026	10001+	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
17	Liderman	Exact match	Lima, PeruHQ recorded Sep 21, 2026	10001+	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
18	Securitas Sverige AB	Exact match	Stockholm, SwedenHQ recorded Sep 21, 2026	5,001-10,000	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
19	Security Industry Specialists	Exact match	Culver City, CA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	2,500 contacts →
	Exact match “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Orsegups Participações S A	Exact match	São José, BrazilHQ recorded Sep 21, 2026	5,001-10,000	2,462 contacts →
	Exact match “A Orsegups atua desde 1977 na prestação de serviços de segurança e terceirização de serviços especializados.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,222 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Security Segurança E Serviços	Exact match	São Paulo, BrazilHQ recorded Sep 21, 2026	5,001-10,000	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 21, 2026 · View company records in RevenueBase
23	Crisis24	Exact match	Annapolis, MD, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,025 contacts →
	Exact match “Crisis24, a GardaWorld company, is widely regarded as the leading integrated risk management, crisis response, consulting, and global protective solutions firm, serving the…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Pinkerton Comprehensive Risk Management	Exact match	Ann Arbor, MI, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,022 contacts →
	Exact match “Pinkerton, established in 1850 by Allan Pinkerton, stands as a leading global provider of security and risk management solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	10001+	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 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 “top 10 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 21,927 top 10 security companies worldwide

See the full list, filter by size, metro and specialty, and access 81,098 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Top 10 security companies worldwide at a glance

As of Sep 21, 2026

13.1%Verified-email coverage

28.3Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

9,600

11-50

6,917

51-200

2,985

201-500

1,110

501-1,000

523

1,001-5,000

525

5,001-10,000

10001+

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 top 10 security companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “top 10 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 81,098 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.

Top 10 security companies by location

111 lists · largest first

Every Top 10 security companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “top 10 security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many top 10 security companies are there worldwide?

RevenueBase identified 21,927 company matches for top 10 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 top 10 security companies?

The United States leads with 5,168 companies, followed by the United Kingdom (1,429) and India (1,291). Every top 10 security companies list by country and city is linked on this page.

Which city has the most top 10 security companies?

London leads with 471 company records, followed by Sao Paulo (239) and Dubai (168).

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 81,098 professional contacts with verified work emails tracked across these 21,927 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.