Company lists · Data refreshed September 2026

Top 25 Commercial real estate security companies worldwide

RevenueBase identified 18,950 commercial real estate security companies worldwide as of September 2026 and tracks 665,950 professional contacts across them, including 51,108 with verified work emails. The United States is the largest market and London the largest hub.

This list covers commercial real estate security companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for commercial real estate security companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review
18,950Companies
665,950Contacts tracked
51,108Verified emails
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The 25 largest commercial real estate security companies worldwide

Ranked by team size
Top 25 of 18,950 commercial real estate security companies worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to commercial real estate security companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceLondon, United KingdomHQ checked Sep 27, 202610001+79,699 contacts →

Partial evidence

“G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security…”

Source: RevenueBase Database · checked Sep 27, 2026
2Partial evidenceIrvine, CA, United StatesHQ checked Sep 27, 202610001+62,804 contacts →

Partial evidence

“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…”

Source: RevenueBase Database · checked Sep 27, 2026
3Indirect evidenceMadrid, SpainHQ checked Sep 27, 202610001+40,747 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
4Partial evidenceParsippany, NJ, United StatesHQ checked Sep 27, 202610001+38,634 contacts →

Partial evidence

“Securitas knows Security.”

Source: RevenueBase Database · checked Sep 27, 2026
5Partial evidenceSao Paulo, BrazilHQ checked Sep 27, 202610001+7,986 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
6Indirect evidenceSao Paulo, BrazilHQ checked Sep 27, 202610001+4,530 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceSao Paulo, BrazilHQ checked Sep 27, 202610001+4,292 contacts →

Indirect evidence

“O que é trabalhar no Grupo Haganá?”

Source: RevenueBase Database · checked Sep 27, 2026
8Partial evidenceSt. Petersburg, FL, United StatesHQ checked Sep 27, 2026n/a4,038 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
9Partial evidenceIssy-les-moulineaux, FranceHQ checked Sep 27, 202610001+3,843 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 27, 2026
10Partial evidencePasadena, CA, United StatesHQ checked Sep 27, 202610001+3,612 contacts →

Partial evidence

“EVERYWHERE SECURITY MATTERS.”

Source: RevenueBase Database · checked Sep 27, 2026
11Indirect evidenceRoswell, GA, United StatesHQ checked Sep 27, 202610001+3,592 contacts →

Indirect evidence

“U.S.”

Source: RevenueBase Database · checked Sep 27, 2026
12Indirect evidenceLima, PeruHQ checked Sep 27, 202610001+3,140 contacts →

Indirect evidence

“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…”

Source: RevenueBase Database · checked Sep 27, 2026
13Partial evidenceStockholm, SwedenHQ checked Sep 27, 20265,001-10,0003,004 contacts →

Partial evidence

“Securitas is a global knowledge leader in security.”

Source: RevenueBase Database · checked Sep 27, 2026
14Indirect evidenceSão Paulo, BrazilHQ checked Sep 27, 202610001+2,772 contacts →

Indirect evidence

“Fundado em 1992, o GRUPO GR se consolidou no mercado por sua qualidade e seriedade na implantação e operação de soluções de segurança e serviços para diversos tipos de clientes.”

Source: RevenueBase Database · checked Sep 27, 2026
15Indirect evidenceSão José, BrazilHQ checked Sep 27, 20265,001-10,0002,462 contacts →

Indirect evidence

“A Orsegups atua desde 1977 na prestação de serviços de segurança e terceirização de serviços especializados.”

Source: RevenueBase Database · checked Sep 27, 2026
16Partial evidenceToronto, ON, CanadaHQ checked Sep 27, 20261,001-5,0002,365 contacts →

Partial evidence

“Founded in 1976, Paragon Security is Ontario’s largest privately owned security company.”

Source: RevenueBase Database · checked Sep 27, 2026
17Partial evidenceAurora, IL, United StatesHQ checked Sep 27, 20265,001-10,0002,266 contacts →

Partial evidence

“Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.”

Source: RevenueBase Database · checked Sep 27, 2026
18Partial evidenceChattanooga, TN, United StatesHQ checked Sep 27, 20265,001-10,0002,174 contacts →

Partial evidence

“Through an ISO® 9001:2015 Certified Quality Management System (QMS), Walden Security has earned an award-winning reputation for business excellence and employee satisfaction…”

Source: RevenueBase Database · checked Sep 27, 2026
19Partial evidenceSão Paulo, BrazilHQ checked Sep 27, 20265,001-10,0002,165 contacts →

Partial evidence

“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…”

Source: RevenueBase Database · checked Sep 27, 2026
20Strong evidenceIstanbul, TürkiyeHQ checked Sep 27, 20261,001-5,0002,126 contacts →

Strong evidence

“Pronet is the leading electronic security company that offers residential and commercial security solutions in Turkey.”

Source: RevenueBase Database · checked Sep 27, 2026
21Strong evidenceIrving, TX, United StatesHQ checked Sep 27, 20261,001-5,0002,045 contacts →

Strong evidence

“Everon is a leading national provider of commercial security, video, fire, sprinkler, and life safety solutions for complex, multi-site businesses and organizations.”

Source: RevenueBase Database · checked Sep 27, 2026
22Indirect evidenceSchiedam, NetherlandsHQ checked Sep 27, 20265,001-10,0001,922 contacts →

Indirect evidence

“Elke dag zetten onze collega’s zich in voor jouw veiligheid en die van iedereen om jou heen, zodat jij je veilig voelt en veilig bent.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceEssendon Fields, AustraliaHQ checked Sep 27, 20265,001-10,0001,813 contacts →

Partial evidence

“At Wilson Security, we are committed to building a safer future for everyone.”

Source: RevenueBase Database · checked Sep 27, 2026
24Indirect evidenceSt. Louis, MO, United StatesHQ checked Sep 27, 20265,001-10,0001,781 contacts →

Indirect evidence

“Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.”

Source: RevenueBase Database · checked Sep 27, 2026
25Indirect evidenceDenver, CO, United StatesHQ checked Sep 27, 20265,001-10,0001,727 contacts →

Indirect evidence

“HSS is now Tarian!”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 18,950 commercial real estate security companies worldwide

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Commercial real estate security companies worldwide at a glance

As of Sep 27, 2026
7.7%Verified-email coverage
35.1Average contacts per company
11-50Median size (employees)
2.1%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
5,691
11-50
5,639
51-200
3,916
201-500
1,644
501-1,000
833
1,001-5,000
800
5,001-10,000
151
10001+
114

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among commercial real estate security companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage
Every country. Country and city lists for commercial real estate security companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “commercial real estate security companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names commercial real estate security companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among commercial real estate security companies, and records with no verified work email.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 51,108 across the full list. 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.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Commercial real estate security companies by location

62 lists · largest first

Every Commercial real estate 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names commercial real estate security companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many commercial real estate security companies are there worldwide?

RevenueBase identified 18,950 commercial real estate security companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

G4s, headquartered in London, tops this list with the largest team on record.

Which country has the most commercial real estate security companies?

The United States leads with 3,808 companies, followed by the United Kingdom (1,719) and Brazil (1,465). Every commercial real estate security companies list by country and city is linked on this page.

Which city has the most commercial real estate security companies?

London leads with 394 headquartered companies, followed by Sao Paulo (296) and New York (116).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 51,108 verified decision-maker contacts tracked across these 18,950 companies.

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.

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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 Smart Search, 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.