Company lists · Data refreshed November 2026

Top 25 Security businesses worldwide

RevenueBase identified 59,526 company matches for security businesses worldwide as of November 2026 and tracks 1,447,176 professional contacts across them, including 150,746 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for security businesses 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 November 6, 2026. Country and city lists for security businesses 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 Nov 6, 2026 How this list was built
59,526Companies
1,447,176Contacts tracked
150,746Verified emails
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The 25 largest security businesses worldwide

Ranked by team size
Top 25 of 59,526 company matches for security businesses worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Nov 6, 202610001+86,236 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchIrvine, IL, United StatesHQ recorded Nov 6, 202610001+66,203 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchMadrid, SpainHQ recorded Nov 6, 202610001+46,086 contacts →

Exact match

“50 Years of Excellence: Experience, Innovation, and Commitment to Safety.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchParsippany, MI, United StatesHQ recorded Nov 6, 202610001+40,551 contacts →

Exact match

“Securitas knows Security.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSaint-laurent, FL, CanadaHQ recorded Nov 6, 202610001+17,987 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchGlobal Hq - Versoix, GermanyHQ recorded Nov 6, 202610001+16,176 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 and number one…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+8,791 contacts →

Exact match

“One of the largest companies in the professional services and security markets in Brazil.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+7,503 contacts →

Exact match

“Sempre inovador, o Grupo Souza Lima desenvolve soluções completas e híbridas, que realmente funcionam, em serviços de Segurança, Limpeza e Facilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchStockholm, SwedenHQ recorded Nov 6, 202610001+7,033 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchStaines, United KingdomHQ recorded Nov 6, 202610001+6,705 contacts →

Exact match

“Making the world a safer place.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCork, IrelandHQ recorded Nov 6, 202610001+5,755 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 · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+5,254 contacts →

Exact match

“A SegurPro é o próximo passo em segurança privada.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchSingaporeHQ recorded Nov 6, 202610001+5,040 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 · Nov 6, 2026 · View company records in RevenueBase
14Exact matchBarueri, BrazilHQ recorded Nov 6, 202610001+5,036 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 · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBurnaby, BC, CanadaHQ recorded Nov 6, 202610001+4,808 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 · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSao Paulo, BrazilHQ recorded Nov 6, 202610001+4,705 contacts →

Exact match

“O que é trabalhar no Grupo Haganá?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchRoswell, UT, United StatesHQ recorded Nov 6, 202610001+4,263 contacts →

Exact match

“U.S.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchIssy-les-moulineaux, FranceHQ recorded Nov 6, 202610001+4,112 contacts →

Exact match

“Securitas vous apporte son savoir‑faire et ses compétences dans la sécurisation de votre entreprise.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchNorthridge, CA, United StatesHQ recorded Nov 6, 202610001+4,090 contacts →

Exact match

“Contemporary Services Corporation (CSC) is recognized worldwide as the pioneer, expert and only employee owned company in the crowd management field.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSt. Petersburg, FL, United StatesHQ recorded Nov 6, 2026n/a4,040 contacts →

Exact match

“Excelsior Defense is a security and investigations company based out of St.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMadrid, SpainHQ recorded Nov 6, 202610001+3,955 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 · Nov 6, 2026 · View company records in RevenueBase
22Exact matchPasadena, CA, United StatesHQ recorded Nov 6, 202610001+3,921 contacts →

Exact match

“Everywhere Security Matters™ Inter-Con is one of the largest and fastest-growing physical security and risk management companies in the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchNew Delhi, IndiaHQ recorded Nov 6, 202610001+3,869 contacts →

Exact match

“SIS Group Enterprises commenced operations as a two-member company in 1974 and has since transformed into one of the market leaders in the Asia Pacific region, in Security…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSouth AfricaHQ recorded Nov 6, 202610001+3,786 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 · Nov 6, 2026 · View company records in RevenueBase
25Exact matchCity Of Tshwane, South AfricaHQ recorded Nov 6, 202610001+3,688 contacts →

Exact match

“Bidvest Protea Coin is a leading provider of integrated, intelligence driven risk management services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 59,526 security businesses worldwide

See the full list, filter by size, metro and specialty, and access 150,746 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Security businesses worldwide at a glance

As of Nov 6, 2026
10.4%Verified-email coverage
24.3Average contacts per company
11-50Median size (employees)
1.8%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
23,037
11-50
18,699
51-200
9,323
201-500
3,511
501-1,000
1,727
1,001-5,000
1,634
5,001-10,000
307
10001+
299

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 security businesses are linked below.
What qualifies
Company records worldwide whose business descriptions match “security businesses” 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 150,746 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 November 6, 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.

Security businesses by location

222 lists · largest first

Every Security businesses 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 “security businesses”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many security businesses are there worldwide?

RevenueBase identified 59,526 company matches for security businesses worldwide as of November 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 security businesses?

The United States leads with 11,258 companies, followed by the United Kingdom (6,051) and Brazil (4,038). Every security businesses list by country and city is linked on this page.

Which city has the most security businesses?

London leads with 1063 company records, followed by Sao Paulo (815) and Dubai (308).

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 150,746 professional contacts with verified work emails tracked across these 59,526 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 November 6, 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.