Company lists · Data refreshed September 2026

Top 25 Corporate security contractors worldwide

RevenueBase identified 13,139 corporate security contractors worldwide as of September 2026 and tracks 412,338 professional contacts across them, including 32,083 with verified work emails. The United States is the largest market and London the largest hub.

This list covers corporate 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 27, 2026. Country and city lists for corporate 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 27, 2026 86% judged on-target in blind review
13,139Companies
412,338Contacts tracked
32,083Verified emails
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The 25 largest corporate security contractors worldwide

Ranked by team size
Top 25 of 13,139 corporate security contractors worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to corporate 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect 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
2Partial evidenceParsippany, NJ, United StatesHQ checked Sep 27, 202610001+38,634 contacts →

Partial evidence

“Securitas knows Security.”

Source: RevenueBase Database · checked Sep 27, 2026
3Partial evidenceSingaporeHQ checked Sep 27, 202610001+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 27, 2026
4Indirect 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
5Indirect 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
6Partial 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
7Partial 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
8Partial evidencePasadena, CA, United StatesHQ checked Sep 27, 202610001+3,612 contacts →

Partial evidence

“EVERYWHERE SECURITY MATTERS.”

Source: RevenueBase Database · checked Sep 27, 2026
9Indirect evidenceRoswell, GA, United StatesHQ checked Sep 27, 202610001+3,592 contacts →

Indirect evidence

“U.S.”

Source: RevenueBase Database · checked Sep 27, 2026
10Partial 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
11Indirect 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
12Partial 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
13Partial 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
14Partial 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
15Indirect evidenceSão Paulo, BrazilHQ checked Sep 27, 20265,001-10,0002,165 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 27, 2026
16Indirect 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
17Partial 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
18Indirect 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
19Indirect 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
20Indirect evidenceجده, Saudi ArabiaHQ checked Sep 27, 2026n/a1,699 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 27, 2026
21Partial evidenceRaleigh, NC, United StatesHQ checked Sep 27, 20265,001-10,0001,639 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 27, 2026
22Indirect evidenceNorth York, ON, CanadaHQ checked Sep 27, 20265,001-10,0001,632 contacts →

Indirect evidence

“Over 90 years of protecting the things that matter, we’ve seen more than most.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceBurnaby, BC, CanadaHQ checked Sep 27, 20261,001-5,0001,464 contacts →

Partial evidence

“Securiguard Services Limited has been at the forefront of the asset protection arena for 50 years by being a leading-edge innovative security and safety solutions provider.”

Source: RevenueBase Database · checked Sep 27, 2026
24Strong evidenceBethesda, MD, United StatesHQ checked Sep 27, 20265,001-10,0001,441 contacts →

Strong 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 27, 2026
25Indirect evidenceDiegem, BelgiumHQ checked Sep 27, 20265,001-10,0001,419 contacts →

Indirect evidence

“See a different world.”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 13,139 corporate security contractors worldwide

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Corporate security contractors worldwide at a glance

As of Sep 27, 2026
7.8%Verified-email coverage
31.4Average contacts per company
11-50Median size (employees)
2.3%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
3,517
11-50
3,833
51-200
2,922
201-500
1,262
501-1,000
650
1,001-5,000
634
5,001-10,000
122
10001+
98

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 corporate 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 corporate security contractors are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “corporate 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 corporate 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 corporate 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, 32,083 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.

Corporate security contractors by location

46 lists · largest first

Every Corporate 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 corporate 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 corporate security contractors are there worldwide?

RevenueBase identified 13,139 corporate 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?

Prosegur, headquartered in Madrid, tops this list with the largest team on record.

Which country has the most corporate security contractors?

The United States leads with 2,510 companies, followed by the United Kingdom (1,027) and France (739). Every corporate security contractors list by country and city is linked on this page.

Which city has the most corporate security contractors?

London leads with 302 headquartered companies, followed by Sao Paulo (175) and New York (93).

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 32,083 verified decision-maker contacts tracked across these 13,139 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.