Company lists · Data refreshed September 2026

Top 25 Door security services worldwide

RevenueBase identified 25,682 door security services worldwide as of September 2026 and tracks 649,643 professional contacts across them, including 80,112 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers door security services 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 door security services 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
25,682Companies
649,643Contacts tracked
80,112Verified emails
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The 25 largest door security services worldwide

Ranked by team size
Top 25 of 25,682 door security services worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to door security services: 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 28, 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 28, 2026
2Partial evidenceIrvine, CA, United StatesHQ checked Sep 28, 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 28, 2026
3Indirect evidenceMadrid, SpainHQ checked Sep 28, 202610001+40,747 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceParsippany, NJ, United StatesHQ checked Sep 28, 202610001+38,634 contacts →

Partial evidence

“Securitas knows Security.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceBoca Raton, FL, United StatesHQ checked Sep 28, 2026n/a20,475 contacts →

Partial evidence

“ADT is the most trusted name in smart home security, helping protect and connect what matters most at home and beyond.”

Source: RevenueBase Database · checked Sep 28, 2026
6Partial evidenceGlobal Hq - Versoix, GermanyHQ checked Sep 28, 202610001+14,199 contacts →

Partial evidence

“Verisure is the global leader in professionally monitored security services by customers served, with a market-leading presence across Europe and Latin America.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceStockholm, SwedenHQ checked Sep 28, 202610001+6,335 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceStaines, United KingdomHQ checked Sep 28, 202610001+6,169 contacts →

Indirect evidence

“Making the world a safer place.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceCork, IrelandHQ checked Sep 28, 202610001+5,384 contacts →

Partial evidence

“Tyco offers comprehensive security solutions to protect people, facilities, and assets as part of Johnson Controls world leading portfolio of building products, technologies…”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceLund, SwedenHQ checked Sep 28, 20261,001-5,0004,850 contacts →

Partial evidence

“Axis enables a smarter and safer world by creating solutions for improving security and business performance.”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial evidenceSt. Petersburg, FL, United StatesHQ checked Sep 28, 2026n/a4,038 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceIssy-les-moulineaux, FranceHQ checked Sep 28, 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 28, 2026
13Partial evidenceMadrid, SpainHQ checked Sep 28, 202610001+3,620 contacts →

Partial evidence

“Securitas, Soluciones de Seguridad a medida Nuestro liderazgo en conocimientos de seguridad nos ha permitido desarrollar una estrategia basada en tres pilares fundamentales…”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceRoswell, GA, United StatesHQ checked Sep 28, 202610001+3,592 contacts →

Indirect evidence

“U.S.”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceDublin 7, IrelandHQ checked Sep 28, 202610001+3,024 contacts →

Indirect evidence

“Allegion (NYSE: ALLE) is a global pioneer in seamless access, with leading brands like CISA®, Interflex®, LCN®, Schlage®, SimonsVoss® and Von Duprin®.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceSão Paulo, BrazilHQ checked Sep 28, 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 28, 2026
17Indirect evidenceAlpharetta, GA, United StatesHQ checked Sep 28, 2026n/a2,678 contacts →

Indirect evidence

“Since 1987, Automated Systems Design, Inc.(ASD®) a five-time Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceSão José, BrazilHQ checked Sep 28, 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 28, 2026
19Indirect evidenceSão Paulo, BrazilHQ checked Sep 28, 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 28, 2026
20Partial evidenceIstanbul, TürkiyeHQ checked Sep 28, 20261,001-5,0002,126 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 28, 2026
21Partial evidenceIrving, TX, United StatesHQ checked Sep 28, 20261,001-5,0002,045 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
22Partial evidenceEssendon Fields, AustraliaHQ checked Sep 28, 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 28, 2026
23Indirect evidenceNorth York, ON, CanadaHQ checked Sep 28, 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 28, 2026
24Partial evidenceJohannesburg, South AfricaHQ checked Sep 28, 202610001+1,544 contacts →

Partial evidence

“FIDELITY ADT COMMERCIAL Fidelity ADT Commercial, a division of Fidelity ADT is a leading provider of integrated retail performance and security solutions, deployed today at more…”

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceDiegem, BelgiumHQ checked Sep 28, 20265,001-10,0001,419 contacts →

Indirect evidence

“See a different world.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 25,682 door security services worldwide

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Door security services worldwide at a glance

As of Sep 28, 2026
12.3%Verified-email coverage
25.3Average contacts per company
11-50Median size (employees)
1.4%Largest-city concentration · Sao Paulo
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
11,765
11-50
8,526
51-200
3,192
201-500
974
501-1,000
423
1,001-5,000
392
5,001-10,000
77
10001+
88

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 door security services, 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 door security services are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “door security services”. 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 door security services), 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 door security services, 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, 80,112 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.

Door security services by location

87 lists · largest first

Every Door security services 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 door security services, 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 door security services are there worldwide?

RevenueBase identified 25,682 door security services 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 door security services?

The United States leads with 4,832 companies, followed by the United Kingdom (2,178) and Brazil (1,971). Every door security services list by country and city is linked on this page.

Which city has the most door security services?

Sao Paulo leads with 359 headquartered companies, followed by London (282) and Dubai (113).

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 80,112 verified decision-maker contacts tracked across these 25,682 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.