Company lists · Data refreshed September 2026

Top 25 Access control system contractors worldwide

Name: Access control system contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 9,326 companies tracked

RevenueBase identified 9,326 access control system contractors worldwide as of September 2026 and tracks 83,431 professional contacts across them, including 21,295 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers access control system 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 30, 2026. Country and city lists for access control system 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 30, 2026 86% judged on-target in blind review

9,326Companies

83,431Contacts tracked

21,295Verified emails

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The 25 largest access control system contractors worldwide

Ranked by team size

Top 25 of 9,326 access control system contractors worldwide, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to access control system 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	Allegion	Partial evidence	Dublin 7, IrelandHQ checked Sep 30, 2026	10001+	3,024 contacts →
	Partial 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 30, 2026
2	Automated Systems Design, INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 30, 2026	n/a	2,678 contacts →
	Partial evidence “Since 1987, Automated Systems Design, Inc.(ASD®) a five-time Inc.” Source: RevenueBase Database · checked Sep 30, 2026
3	Security 101	Partial evidence	West Palm Beach, FL, United StatesHQ checked Sep 30, 2026	501-1,000	849 contacts →
	Partial evidence “Security 101® is a nationwide leader in designing, installing, and maintaining advanced security systems tailored to the unique needs of organizations of all sizes.” Source: RevenueBase Database · checked Sep 30, 2026
4	Securiton AG	Partial evidence	Zollikofen, SwitzerlandHQ checked Sep 30, 2026	501-1,000	542 contacts →
	Partial evidence “Securiton AG has been a leading manufacturer and installer of alarm and security systems since 1948 and is part of the Swiss Securitas Group.” Source: RevenueBase Database · checked Sep 30, 2026
5	Kingalarm Systems	Partial evidence	Kingston 5, JamaicaHQ checked Sep 30, 2026	1,001-5,000	542 contacts →
	Partial evidence “KingAlarm Systems began operations in March and, in a relatively short time, has become the largest Electronic Security Company not just in Jamaica but the entire Caribbean…” Source: RevenueBase Database · checked Sep 30, 2026
6	Tech Systems Inc. TSI	Partial evidence	Buford, GA, IndiaHQ checked Sep 30, 2026	501-1,000	527 contacts →
	Partial evidence “Since 1987, Tech Systems, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
7	Assa Abloy Opening Solutions Americas	Partial evidence	New Haven, CT, United StatesHQ checked Sep 30, 2026	10001+	506 contacts →
	Partial evidence “ASSA ABLOY Opening Solutions Americas provides a complete range of door opening products for access solutions in homes, businesses, and institutions.” Source: RevenueBase Database · checked Sep 30, 2026
8	Eryma Security Systems	Indirect evidence	Issy-les-moulineaux, FranceHQ checked Sep 30, 2026	201-500	457 contacts →
	Indirect evidence “En tant qu’intégrateur ouvert de solutions de sûreté électroniques, nous vous accompagnons dans la protection de vos biens et personnes.” Source: RevenueBase Database · checked Sep 30, 2026
9	The Cook & Boardman Group, LLC	Indirect evidence	Winston-Salem, NC, United StatesHQ checked Sep 30, 2026	1,001-5,000	445 contacts →
	Indirect evidence “Established in 1955, The Cook & Boardman Group is the nation’s premier provider of architectural doors and frames, door hardware and related building specialty products in…” Source: RevenueBase Database · checked Sep 30, 2026
10	Napco Security Technologies	Indirect evidence	Amityville, NY, United StatesHQ checked Sep 30, 2026	501-1,000	427 contacts →
	Indirect evidence “NAPCO Security Technologies (NASDAQ: NSSC) is one of the world's leading manufacturers of technologically advanced electronic security equipment including intrusion and fire alarm…” Source: RevenueBase Database · checked Sep 30, 2026
11	PCSS	Partial evidence	SingaporeHQ checked Sep 30, 2026	501-1,000	387 contacts →
	Partial evidence “PCSS is a Singapore-based systems integrator with more than 25 years of experience and accolades in providing secure, reliable and state-of-the-art security solutions.” Source: RevenueBase Database · checked Sep 30, 2026
12	Kings Secure Technologies	Partial evidence	Bradford, United KingdomHQ checked Sep 30, 2026	501-1,000	326 contacts →
	Partial evidence “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Source: RevenueBase Database · checked Sep 30, 2026
13	Dormakaba Germany	Indirect evidence	Ennepetal, GermanyHQ checked Sep 30, 2026	10001+	324 contacts →
	Indirect evidence “Kaba Group, from Rümlang in Zurich (Switzerland), and Dorma Group, based in Ennepetal near Düsseldorf (Germany), merged to form dormakaba in September 2015.” Source: RevenueBase Database · checked Sep 30, 2026
14	Embraps	Partial evidence	Santos, BrazilHQ checked Sep 30, 2026	1,001-5,000	321 contacts →
	Partial evidence “A empresa oferece profissionais qualificados para diversas funções, entre elas, portaria e/ou controlador de acesso, auxiliar de serviços gerais, zeladoria, atendente, auxiliar…” Source: RevenueBase Database · checked Sep 30, 2026
15	Certego Group	Partial evidence	Västerås, SwedenHQ checked Sep 30, 2026	1,001-5,000	311 contacts →
	Partial evidence “CERTEGO is a Nordic expert in access and monitoring solutions.” Source: RevenueBase Database · checked Sep 30, 2026
16	AFA Protective Systems, INC	Indirect evidence	Syosset, NY, United StatesHQ checked Sep 30, 2026	201-500	302 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
17	Cogelec	Indirect evidence	Mortagne Sur Sèvre, FranceHQ checked Sep 30, 2026	201-500	295 contacts →
	Indirect evidence “Cogelec, is an entrepreneurial manufacturer with a 20-year pedigree.” Source: RevenueBase Database · checked Sep 30, 2026
18	Paxton Access LTD	Indirect evidence	Brighton, United KingdomHQ checked Sep 30, 2026	201-500	255 contacts →
	Indirect evidence “With 40 years of experience, Paxton is a company passionate about technology.” Source: RevenueBase Database · checked Sep 30, 2026
19	Wittenbach	Indirect evidence	Sparks, MD, United StatesHQ checked Sep 30, 2026	201-500	244 contacts →
	Indirect evidence “For over 50 years, Wittenbach has been a trusted leader in advanced security solutions in financial and commercial industries.” Source: RevenueBase Database · checked Sep 30, 2026
20	NAVCO	Partial evidence	Orange, CA, United StatesHQ checked Sep 30, 2026	51-200	232 contacts →
	Partial evidence “One of the largest privately held national electronic security system integrator in the USA, NAVCO keeps you one step ahead of ever-changing technology.” Source: RevenueBase Database · checked Sep 30, 2026
21	Manusa	Partial evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 30, 2026	201-500	229 contacts →
	Partial evidence “Founded more than 60 years ago, Manusa has grown to become a leading company in the creation, design, development and service of all types of smart access.” Source: RevenueBase Database · checked Sep 30, 2026
22	AVTEL	Partial evidence	SingaporeHQ checked Sep 30, 2026	51-200	228 contacts →
	Partial evidence “AVTEL specialise in electronic security systems.” Source: RevenueBase Database · checked Sep 30, 2026
23	Alarm Detection Systems	Partial evidence	Aurora, IL, United StatesHQ checked Sep 30, 2026	201-500	225 contacts →
	Partial evidence “Family owned and operated since 1968, Alarm Detection Systems, Inc.(ADS) understands that nothing is more important than the safety of your family and the protection of your…” Source: RevenueBase Database · checked Sep 30, 2026
24	ANG India LTD	Partial evidence	Noida, IndiaHQ checked Sep 30, 2026	201-500	210 contacts →
	Partial evidence “A’nG INDIA specializes in Security surveillance, Fire Detection and CCTV products with system design and custom engineering being a major strength.” Source: RevenueBase Database · checked Sep 30, 2026
25	Datawatch Systems	Strong evidence	Bethesda, MD, United StatesHQ checked Sep 30, 2026	201-500	206 contacts →
	Strong evidence “An industry leader in managed access control security solutions and services since 1981, Datawatch Systems is trusted by building owners, property managers, and tenants across the…” Source: RevenueBase Database · checked Sep 30, 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: access control system 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 access control system contractors.
Partial evidence: Its own public description names part of access control system contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name access control system 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 9,326 access control system contractors worldwide

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Access control system contractors worldwide at a glance

As of Sep 30, 2026

25.5%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · Sao Paulo

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

4,930

11-50

3,322

51-200

790

201-500

118

501-1,000

1,001-5,000

5,001-10,000

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 access control system 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 access control system contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “access control system 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 access control system 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 access control system 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, 21,295 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 30, 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.

Access control system contractors by location

33 lists · largest first

Every Access control system 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 access control system 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 access control system contractors are there worldwide?

RevenueBase identified 9,326 access control system 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?

Allegion, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most access control system contractors?

The United States leads with 1,976 companies, followed by the United Kingdom (989) and Brazil (557). Every access control system contractors list by country and city is linked on this page.

Which city has the most access control system contractors?

Sao Paulo leads with 132 headquartered companies, followed by London (103) and Dubai (46).

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 21,295 verified decision-maker contacts tracked across these 9,326 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 30, 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.