Company lists · Data refreshed September 2026
Top 25 Security companies based in New York, United States
This directory lists 224 security companies based in New York, United States, with 6,988 contacts and 732 email addresses for business research and outreach. As of September 2026, New York is the single most-represented city among the companies on the list.
Security companies provide services, systems, or products that protect people, property, facilities, data, networks, or other assets from security threats. This list covers companies that provide security products or services, including physical security, cybersecurity, monitoring, access control, risk management, and related protection solutions. Ranked by team size, largest first. Data current as of September 6, 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.
The 25 largest security companies based in New York, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,375 | ||||
“Guardsmark, LLC provides security services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 571 | ||||
“Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 519 | ||||
“Mulligan is a Manhattan-based provider of the finest security and fire safety professionals available.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 315 | ||||
“Harvard Protection Services is one of the nation’s premier security firms.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 216 | ||||
“T&M USA provides seamlessly integrated executive protection, investigative and consulting services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 206 | ||||
“Since 1969, thousands of businesses across the country have entrusted their protection to DGA Security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | SilversealStrong evidence | 159 | |||
“Silverseal is a comprehensive security solutions firm with worldwide affiliations that can provide global security services in a highly professional manner.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 129 | ||||
“Founded in 1975, CSS Security, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 120 | ||||
“Excel Security Corp.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | ESCCStrong evidence | 113 | |||
“ESCC has led the way in integrated security and communications applications for commercial properties, high-end residential properties, and new development projects for over 30…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 110 | ||||
“Allstar Security & Consulting is a full service, licensed, bonded and insured security services company.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Narrow SecurityStrong evidence | 103 | |||
“Narrow Security provides Fire Guard Services and Security Guard Services across the US.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 82 | ||||
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 82 | ||||
“For over 30 years GMSC has been securing high profile buildings and offices across New York and Chicago.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 82 | ||||
“Security USA®, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Integrated Security ServicesStrong evidence | 72 | |||
“Integrated Security Services, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 72 | ||||
“ADR Security is the leading provider of electronic and physical security services to some of New York's largest residential real estate portfolios.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 70 | ||||
“At GLOBAL OPS, we specialize in creating and implementing tailored security solutions that cater to the unique needs of our diverse clientele.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 68 | ||||
“At CITY SAFE PARTNERS SECURITY, we create solutions and put systems in place to ensure that people and businesses are secure.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 68 | ||||
“We are among the few private security guard companies offering security guard services nationwide.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 60 | ||||
“A&H Security Services, is a certified NYC MBE security services provider who makes a difference in our community.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 53 | ||||
“SW24 is a privately-held, premier systems integration company founded by veteran law enforcement professionals and staffed by security industry experts.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 51 | ||||
“CITADEL SECURITY AGENCY has been at the forefront of private security in New York City since 1981.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 36 | ||||
“OHZ is America’s way to secure and save.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 36 | ||||
“SECURITY.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 224 security companies based in New York, United States
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Security companies based in New York, United States at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for New York, over 224 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 security 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 New York, United States whose own description of what they do matches “security 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 security companies, and records with no verified work email. Companies headquartered outside New York 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, 732 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 6, 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.
Security companies by metro in the United States
- Security companies in New York224
- Security companies in Los Angeles187
- Security companies in Houston184
- Security companies in Miami154
- Security companies in Chicago102
- Security companies in Atlanta99
- Security companies in Dallas99
- Security companies in Austin84
- Security companies in Phoenix84
- Security companies in Las Vegas67
- Security companies in Orlando66
- Security companies in San Antonio59
- Security companies in Tampa59
- Security companies in Charlotte56
- Security companies in Denver56
- Security companies in San Diego55
- Security companies in Indianapolis46
- Security companies in Sacramento46
- Security companies in San Francisco45
- Security companies in San Jose45
- Security companies in Jacksonville44
- Security companies in Seattle44
- Security companies in Baltimore42
- Security companies in Nashville37
- Security companies in Fort Lauderdale36
- Security companies in Columbus34
- Security companies in Memphis34
- Security companies in Portland34
- Security companies in Washington34
- Security companies in Philadelphia32
- Security companies in Raleigh32
- Security companies in Columbia31
- Security companies in Fort Worth31
- Security companies in Cincinnati30
- Security companies in Brooklyn29
- Security companies in Louisville28
- Security companies in Wilmington28
- Security companies in Albuquerque26
- Security companies in Richmond26
- Security companies in Riverside26
- Security companies in Springfield26
- Security companies in Boca Raton25
- Security companies in Boston25
- Security companies in Colorado Springs25
- Security companies in Irvine25
Frequently asked
How many security companies are based in New York, United States?
RevenueBase counts 224 security companies based in New York, United States on this list.
How many contacts and email addresses are available for security companies?
The list includes 6,988 contacts and 732 email addresses for security companies.
Which city has the most security companies on the list?
New York is the single most-represented city among the companies on the list.
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Security companies by geography
- Security companies based in the United States
- Security companies based in the United Kingdom
- Security companies based in Brazil
- Security companies based in France
- Security companies based in Canada
- Security companies based in Germany
- Security companies based in Italy
- Security companies based in Australia
- Security companies based in the Netherlands
- Security companies based in Mexico
- Security companies based in South Africa
- Security companies based in Spain
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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.