Company lists · Data refreshed September 2026

Top 25 Enterprise security system providers based in the United States

Name: Enterprise security system providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 3,637 companies tracked

RevenueBase identified 3,637 enterprise security system providers headquartered in the United States as of September 2026 and tracks 140,005 professional contacts across them, including 31,137 with verified work emails. New York is the largest hub.

This list covers enterprise security system providers 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

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

3,637Companies

140,005Contacts tracked

31,137Verified emails

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The 25 largest enterprise security system providers based in the United States

Ranked by team size

Top 25 of 3,637 enterprise security system providers based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security system providers: 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	Convergint	Partial evidence	Hoffman Estates, IL, United StatesHQ checked Sep 28, 2026	10001+	5,707 contacts →
	Partial evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 28, 2026
3	Verkada	Indirect evidence	San Mateo, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,683 contacts →
	Indirect evidence “Transforming how organizations protect people and places.” Source: RevenueBase Database · checked Sep 28, 2026
4	Automated Systems Design, INC	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 28, 2026	n/a	2,678 contacts →
	Partial evidence “Since 1987, Automated Systems Design, Inc.(ASD®) a five-time Inc.” Source: RevenueBase Database · checked Sep 28, 2026
5	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
6	Protection 1 Security Solutions	Partial evidence	Romeoville, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,406 contacts →
	Partial evidence “As of May 2016, Protection 1 and ADT merged together to become the leading company in the electronic security industry.” Source: RevenueBase Database · checked Sep 28, 2026
7	Vector Security	Partial evidence	Warrendale, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,287 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
8	Titan Security Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,138 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
9	Security 101	Strong evidence	West Palm Beach, FL, United StatesHQ checked Sep 28, 2026	501-1,000	849 contacts →
	Strong 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 28, 2026
10	Securitas Electronic Security, INC	Partial evidence	Uniontown, OH, United StatesHQ checked Sep 28, 2026	10001+	839 contacts →
	Partial evidence “Securitas knows Security.” Source: RevenueBase Database · checked Sep 28, 2026
11	ADT Commercial	Indirect evidence	Boca Raton, FL, United StatesHQ checked Sep 28, 2026	n/a	799 contacts →
	Indirect evidence “ADT Commercial, LLC was acquired by GTCR and is now Everon, LLC.” Source: RevenueBase Database · checked Sep 28, 2026
12	Northeast Security INC	Partial evidence	Westwood, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	748 contacts →
	Partial evidence “Improving Security.” Source: RevenueBase Database · checked Sep 28, 2026
13	LVT Liveview Technologies	Indirect evidence	American Fork, UT, United StatesHQ checked Sep 28, 2026	501-1,000	697 contacts →
	Indirect evidence “LVT provides rapidly-deployable surveillance hardware that runs on our proprietary SaaS platform.” Source: RevenueBase Database · checked Sep 28, 2026
14	Huntress	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 28, 2026	501-1,000	696 contacts →
	Indirect evidence “Protect Your Endpoints, Identities, Logs, and Employees.” Source: RevenueBase Database · checked Sep 28, 2026
15	Kastle Systems	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 28, 2026	501-1,000	686 contacts →
	Partial evidence “Kastle is a leading provider of property technology solutions, protecting commercial real estate, multi-family residential, global enterprises, educational institutions and…” Source: RevenueBase Database · checked Sep 28, 2026
16	Telos Corporation	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 28, 2026	501-1,000	629 contacts →
	Partial evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 28, 2026
17	Interface Systems	Strong evidence	St Louis, MO, United StatesHQ checked Sep 28, 2026	501-1,000	569 contacts →
	Strong evidence “Interface Systems combines AI-powered technologies with expert remote video monitoring from its US-based Interactive Security Operations Centers (iSOCs).” Source: RevenueBase Database · checked Sep 28, 2026
18	Pavion	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	558 contacts →
	Partial evidence “Pavion Connects and Protects by providing Fire, Security, and Integration solutions to customers.” Source: RevenueBase Database · checked Sep 28, 2026
19	BRIVO	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 28, 2026	501-1,000	541 contacts →
	Partial evidence “Brivo is the global leader in cloud-native physical security, with more than 2 million devices deployed across locations in 80 countries.” Source: RevenueBase Database · checked Sep 28, 2026
20	The Cook & Boardman Group, LLC	Indirect evidence	Winston-Salem, NC, United StatesHQ checked Sep 28, 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 28, 2026
21	Napco Security Technologies	Partial evidence	Amityville, NY, United StatesHQ checked Sep 28, 2026	501-1,000	427 contacts →
	Partial 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 28, 2026
22	Kent Services	Partial evidence	North Miami Beach, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	417 contacts →
	Partial evidence “At Kent, we’re able to pull from an unequaled pool of business and security products and services.” Source: RevenueBase Database · checked Sep 28, 2026
23	Digital Monitoring Products	Partial evidence	Springfield, MO, United StatesHQ checked Sep 28, 2026	201-500	402 contacts →
	Partial evidence “DMP specializes in delivering innovative security solutions, including burglary, fire, access control and video security products.” Source: RevenueBase Database · checked Sep 28, 2026
24	Guardian Alarm	Partial evidence	Southfield, MI, United StatesHQ checked Sep 28, 2026	501-1,000	389 contacts →
	Partial evidence “Guardian Alarm is one of the largest independently-owned security companies protecting both homes and businesses throughout the Midwest.” Source: RevenueBase Database · checked Sep 28, 2026
25	PELCO	Partial evidence	Fresno, CA, United StatesHQ checked Sep 28, 2026	501-1,000	378 contacts →
	Partial evidence “Pelco, a global leader in security hardware, engineers devices that help set a new standard for security, safety and operational efficiency.” 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: enterprise security system providers. 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 enterprise security system providers.
Partial evidence: Its own public description names part of enterprise security system providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security system providers. 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 3,637 enterprise security system providers based in the United States

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Enterprise security system providers based in the United States at a glance

As of Sep 28, 2026

22.2%Verified-email coverage

38.5Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,571

11-50

1,455

51-200

427

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,637 companies.

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 enterprise security system providers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “enterprise security system providers”. 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 enterprise security system providers), 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 enterprise security system providers, 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 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, 31,137 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.

Enterprise security system providers by metro

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 enterprise security system providers, 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 enterprise security system providers are there based in the United States?

RevenueBase identified 3,637 enterprise security system providers 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?

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

Which city has the most enterprise security system providers?

New York leads with 68 headquartered companies, followed by Houston (65) and Miami (53).

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 31,137 verified decision-maker contacts tracked across these 3,637 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.