Company lists · Data refreshed September 2026

Top 25 Facilities security contractors worldwide

Name: Facilities security contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 9,819 companies tracked

RevenueBase identified 9,819 facilities security contractors worldwide as of September 2026 and tracks 368,685 professional contacts across them, including 28,764 with verified work emails. The United States is the largest market and London the largest hub.

This list covers facilities security contractors 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 28, 2026. Country and city lists for facilities security contractors 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 28, 2026 86% judged on-target in blind review

9,819Companies

368,685Contacts tracked

28,764Verified emails

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The 25 largest facilities security contractors worldwide

Ranked by team size

Top 25 of 9,819 facilities security contractors worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to facilities security contractors: 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Allied Universal	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	10001+	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 28, 2026
2	Securitas Security Services Usa, INC	Partial evidence	Parsippany, NJ, United StatesHQ checked Sep 28, 2026	10001+	38,634 contacts →
	Partial evidence “Securitas knows Security.” Source: RevenueBase Database · checked Sep 28, 2026
3	Certis	Partial evidence	SingaporeHQ checked Sep 28, 2026	10001+	4,610 contacts →
	Partial evidence “Certis is a leading advanced integrated security organisation that develops and delivers multi-disciplinary smart security and integrated services.” Source: RevenueBase Database · checked Sep 28, 2026
4	Grupo Haganá	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	10001+	4,292 contacts →
	Indirect evidence “O que é trabalhar no Grupo Haganá?” Source: RevenueBase Database · checked Sep 28, 2026
5	Unemployed	Partial evidence	St. Petersburg, FL, United StatesHQ checked Sep 28, 2026	n/a	4,038 contacts →
	Partial evidence “Excelsior Defense is a security and investigations company based out of St.” Source: RevenueBase Database · checked Sep 28, 2026
6	Securitas France	Partial evidence	Issy-les-moulineaux, FranceHQ checked Sep 28, 2026	10001+	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 28, 2026
7	Inter-Con Security	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	10001+	3,612 contacts →
	Partial evidence “EVERYWHERE SECURITY MATTERS.” Source: RevenueBase Database · checked Sep 28, 2026
8	U.S. Security Associates, INC	Indirect evidence	Roswell, GA, United StatesHQ checked Sep 28, 2026	10001+	3,592 contacts →
	Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 28, 2026
9	Securitas Sverige AB	Partial evidence	Stockholm, SwedenHQ checked Sep 28, 2026	5,001-10,000	3,004 contacts →
	Partial evidence “Securitas is a global knowledge leader in security.” Source: RevenueBase Database · checked Sep 28, 2026
10	Orsegups Participações S A	Indirect evidence	São José, BrazilHQ checked Sep 28, 2026	5,001-10,000	2,462 contacts →
	Indirect evidence “A Orsegups atua desde 1977 na prestação de serviços de segurança e terceirização de serviços especializados.” Source: RevenueBase Database · checked Sep 28, 2026
11	Paragon Security	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	1,001-5,000	2,365 contacts →
	Partial evidence “Founded in 1976, Paragon Security is Ontario’s largest privately owned security company.” Source: RevenueBase Database · checked Sep 28, 2026
12	Walden Security	Partial evidence	Chattanooga, TN, United StatesHQ checked Sep 28, 2026	5,001-10,000	2,174 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 28, 2026
13	Security Segurança E Serviços	Indirect evidence	São Paulo, BrazilHQ checked Sep 28, 2026	5,001-10,000	2,165 contacts →
	Indirect 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 28, 2026
14	Everon	Partial evidence	Irving, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,045 contacts →
	Partial 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 28, 2026
15	Paragon Systems INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 28, 2026	10001+	1,949 contacts →
	Partial evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 28, 2026
16	Wilson Security	Partial evidence	Essendon Fields, AustraliaHQ checked Sep 28, 2026	5,001-10,000	1,813 contacts →
	Partial evidence “At Wilson Security, we are committed to building a safer future for everyone.” Source: RevenueBase Database · checked Sep 28, 2026
17	Whelan Security	Indirect evidence	St. Louis, MO, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,781 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 28, 2026
18	HSS	Indirect evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,727 contacts →
	Indirect evidence “HSS is now Tarian!” Source: RevenueBase Database · checked Sep 28, 2026
19	شركه حراسات امنيه	Indirect evidence	جده, Saudi ArabiaHQ checked Sep 28, 2026	n/a	1,699 contacts →
	Indirect evidence “نحن شركه تعمل في مجال الحراسات والخدمات الامنيه نقدم افضل الخدمات:مشرفين امن حراس امن *سيارات امنيه” Source: RevenueBase Database · checked Sep 28, 2026
20	Sunstates Security	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,639 contacts →
	Partial evidence “Sunstates Security, LLC is one of the industry's leading providers of contract security services with a differentiated approach to providing successful, cost-effective, quality…” Source: RevenueBase Database · checked Sep 28, 2026
21	Securitas Canada	Indirect evidence	North York, ON, CanadaHQ checked Sep 28, 2026	5,001-10,000	1,632 contacts →
	Indirect evidence “Over 90 years of protecting the things that matter, we’ve seen more than most.” Source: RevenueBase Database · checked Sep 28, 2026
22	Admiral Security Services	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,441 contacts →
	Partial evidence “Admiral Security Services provides professional armed and unarmed uniformed security officers, unparalleled site management and unwavering corporate support that exceeds client…” Source: RevenueBase Database · checked Sep 28, 2026
23	Securitas Belgium	Indirect evidence	Diegem, BelgiumHQ checked Sep 28, 2026	5,001-10,000	1,419 contacts →
	Indirect evidence “See a different world.” Source: RevenueBase Database · checked Sep 28, 2026
24	Weiser Security Services, INC	Partial evidence	New Orleans, LA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,399 contacts →
	Partial evidence “Weiser Security Services is the 11th largest security service provider in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
25	World Security	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 28, 2026	1,001-5,000	1,398 contacts →
	Partial evidence “World Security being a Semi Govt Organization provides specialist turnkey security solutions to the local market and beyond, as well as the Dubai World Group.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: facilities security contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names facilities security contractors.
Partial evidence: Its own public description names part of facilities security contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name facilities security contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 9,819 facilities security contractors worldwide

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Facilities security contractors worldwide at a glance

As of Sep 28, 2026

7.8%Verified-email coverage

37.5Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,525

11-50

2,799

51-200

2,230

201-500

975

501-1,000

531

1,001-5,000

488

5,001-10,000

103

10001+

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 facilities security contractors, 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 facilities security contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “facilities security contractors”. 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 facilities security contractors), 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 facilities security contractors, 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, 28,764 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 28, 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.

Facilities security contractors by location

28 lists · largest first

Every Facilities security contractors 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 facilities security contractors, 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 facilities security contractors are there worldwide?

RevenueBase identified 9,819 facilities security contractors 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?

Allied Universal, headquartered in Irvine, tops this list with the largest team on record.

Which country has the most facilities security contractors?

The United States leads with 2,040 companies, followed by the United Kingdom (697) and Brazil (676). Every facilities security contractors list by country and city is linked on this page.

Which city has the most facilities security contractors?

London leads with 161 headquartered companies, followed by Sao Paulo (137) and Los Angeles (64).

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 28,764 verified decision-maker contacts tracked across these 9,819 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 28, 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.