Company lists · Data refreshed September 2026

Top 25 Physical security system companies based in the United States

RevenueBase identified 3,119 physical security system companies headquartered in the United States as of September 2026 and tracks 56,600 professional contacts across them, including 17,774 with verified work emails and 22,362 with mobile numbers. New York is the largest hub.

This list covers physical security system companies headquartered in the United States, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
3,119Companies
56,600Contacts tracked
17,774Verified emails
22,362Mobile numbers
Unlock all 3,119 companies Free signup · no credit card · 500 free credits

The 25 largest physical security system companies based in the United States

Ranked by team size
Top 25 of 3,119 physical security system companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names physical security system companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
ConvergintPartial evidence
Hoffman Estates, IL, United StatesHQ checked Sep 5, 202610001+5,707

“Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.”

Source: company website · checked Sep 5, 2026
2Alpharetta, GA, United StatesHQ checked Sep 5, 2026n/a2,678

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

Source: company website · checked Sep 5, 2026
3
EveronPartial evidence
Irving, TX, United StatesHQ checked Sep 5, 20261,001-5,0002,045

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

Source: company website · checked Sep 5, 2026
4Romeoville, IL, United StatesHQ checked Sep 5, 20261,001-5,0001,406

“As of May 2016, Protection 1 and ADT merged together to become the leading company in the electronic security industry.”

Source: company website · checked Sep 5, 2026
5
Vector SecurityPartial evidence
Warrendale, PA, United StatesHQ checked Sep 5, 20261,001-5,0001,287

“Vector Security® has protected people and property by providing intelligent security solutions tailored to the needs of the customer for more than 50 years.”

Source: company website · checked Sep 5, 2026
6
Titan Security GroupPartial evidence
Chicago, IL, United StatesHQ checked Sep 5, 20261,001-5,0001,138

“At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.”

Source: company website · checked Sep 5, 2026
7
Security 101Strong evidence
West Palm Beach, FL, United StatesHQ checked Sep 5, 2026501-1,000849

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: company website · checked Sep 5, 2026
8Uniontown, OH, United StatesHQ checked Sep 5, 202610001+839

Securitas knows Security.”

Source: company website · checked Sep 5, 2026
9
ADT CommercialIndirect evidence
Boca Raton, FL, United StatesHQ checked Sep 5, 2026n/a799

“ADT Commercial, LLC was acquired by GTCR and is now Everon, LLC.”

Source: company website · checked Sep 5, 2026
10
Ford Audio-VideoStrong evidence
Oklahoma City, OK, United StatesHQ checked Sep 5, 2026501-1,000564

“Ford AV designs, installs, and services professional and commercial sound, audio-video, network infrastructure, and security surveillance systems for organizations including…”

Source: company website · checked Sep 5, 2026
11
BRIVOStrong evidence
Bethesda, MD, United StatesHQ checked Sep 5, 2026501-1,000541

“Brivo is the global leader in cloud-native physical security, with more than 2 million devices deployed across locations in 80 countries.”

Source: company website · checked Sep 5, 2026
12Amityville, NY, United StatesHQ checked Sep 5, 2026501-1,000427

“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: company website · checked Sep 5, 2026
13
Tech ElectronicsIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 2026201-500406

“Since we opened our doors in 1963, relationships have been are our strength by putting people before products.”

Source: company website · checked Sep 5, 2026
14
PELCOPartial evidence
Fresno, CA, United StatesHQ checked Sep 5, 2026501-1,000378

“Pelco, a global leader in security hardware, engineers devices that help set a new standard for security, safety and operational efficiency.”

Source: company website · checked Sep 5, 2026
15
Lenels2Strong evidence
Pittsford, NY, United StatesHQ checked Sep 5, 2026201-500362

“LenelS2 is a global leader in advanced physical security solutions, including access control, video surveillance and mobile credentialing.”

Source: company website · checked Sep 5, 2026
16
Acre SecurityPartial evidence
Austin, TX, United StatesHQ checked Sep 5, 2026201-500329

“Moving security forward-intelligently, confidently, together.”

Source: company website · checked Sep 5, 2026
17
ADS SecurityPartial evidence
Nashville, TN, United StatesHQ checked Sep 5, 2026201-500324

“Headquartered in Nashville, TN, with branches throughout the Southeastern United States, ADS Security, a Vector Security company, is the 20th largest electronic security company…”

Source: company website · checked Sep 5, 2026
18
AFA Protective Systems, INCIndirect evidence
Syosset, NY, United StatesHQ checked Sep 5, 2026201-500302
Source: company website · checked Sep 5, 2026
19
SonitrolPartial evidence
Indianapolis, United StatesHQ checked Sep 5, 202610001+302

“Sonitrol is the industry leader in verified electronic security and provides customers with a single source of integrated security solutions for intrusion, video, access and fire.”

Source: company website · checked Sep 5, 2026
20
Northland ControlsStrong evidence
Fremont, CA, United StatesHQ checked Sep 5, 2026201-500263

“Northland Controls designs, installs, manages and harmonizes physical security systems across the globe with unparalleled services.”

Source: company website · checked Sep 5, 2026
21Andover, MA, United StatesHQ checked Sep 5, 2026501-1,000254

“Minuteman Security & Life Safety is a leading provider of enterprise security system technology solutions.”

Source: company website · checked Sep 5, 2026
22
WittenbachPartial evidence
Sparks, MD, United StatesHQ checked Sep 5, 2026201-500244

“For over 50 years, Wittenbach has been a trusted leader in advanced security solutions in financial and commercial industries.”

Source: company website · checked Sep 5, 2026
23
Hirsch USAPartial evidence
Santa Ana, CA, United StatesHQ checked Sep 5, 2026201-500240

“Hirsch is a global leader in unified security solutions, helping enterprise and SMB organisations integrate perimeter security, intrusion detection, access control, video…”

Source: company website · checked Sep 5, 2026
24
TRL Systems, INCPartial evidence
Rancho Cucamonga, CA, United StatesHQ checked Sep 5, 2026201-500234

“Safety and security should always be top priority.”

Source: company website · checked Sep 5, 2026
25
NAVCOStrong evidence
Orange, CA, United StatesHQ checked Sep 5, 202651-200232

“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: company website · checked Sep 5, 2026

Showing 25 of 3,119 physical security system companies based in the United States

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Physical security system companies based in the United States at a glance

As of Sep 5, 2026
11-50Median size (employees)
New YorkLargest hub · 57 HQs
22,362Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
1,408
11-50
1,274
51-200
328
201-500
59
501-1,000
21
1,001-5,000
16
5,001-10,000
2
10001+
5

Verified emails by last verification

0–30
16,378
31–60
1,129
61–90
3
90–180
3
180+
261

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 physical security system companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “physical security system companies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among physical security system companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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 an evidence 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, 17,774 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 5, 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.

Frequently asked

How many physical security system companies are there based in the United States?

RevenueBase identified 3,119 physical security system companies headquartered in the United States 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?

Convergint, headquartered in Hoffman Estates, tops this list with the largest team on record.

Which city has the most physical security system companies?

New York leads with 57 headquartered companies, followed by Houston (54) and Miami (41).

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 17,774 verified decision-maker contacts tracked across these 3,119 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,119 physical security system companies based in the United States. Start with a free account, no credit card.

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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 SmartSearch, 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.