Company lists · Data refreshed September 2026
Top 25 Healthcare security companies based in the United States
RevenueBase identified 1,189 healthcare security companies headquartered in the United States as of September 2026 and tracks 96,123 professional contacts across them, including 11,561 with verified work emails and 29,307 with mobile numbers. Los Angeles is the largest hub.
This list covers healthcare security 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 3, 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 healthcare security companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 62,715 | ||||
“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,186 | ||||
“DSI Security Services offers armed and unarmed uniformed security guard services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,148 | ||||
“SOS Security is a known innovator and leader in the security and protective services industry.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,133 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,113 | ||||
“Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,057 | ||||
“Founded in 1982, St.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 850 | ||||
“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 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 744 | ||||
“Improving Security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 404 | ||||
“American Security & Investigations has provided security and investigative services throughout the upper midwest since 1959.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 375 | ||||
“Elite staffs events and facilities with professionals who create a safe and secure environment.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 343 | ||||
“Cambridge Security Services is a private security company that has been in business for more than 30 years.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 322 | ||||
“United American Security was formed in 2010 to bring excellent regional security companies together.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 273 | ||||
“Welcome to Doyle Security Services (DSS) where a team of responsive security professionals stands ready to meet your needs in this ever-changing business environment.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 249 | ||||
“Minuteman Security & Life Safety is a leading provider of enterprise security system technology solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | Central Defense Security, LLCPartial evidence | 208 | |||
“Central Defense Security officers protect the human, intellectual and physical assets of our customers and their visitors.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 203 | ||||
“As the U.S.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | Strategic Security CorporationPartial evidence | 192 | |||
“Strategic Security Corp (SSC) is a nationwide leading provider of integrated security solutions specializing in security guard services, event security, consulting, executive…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 173 | ||||
“Established in 2008, Titan Protection and Consulting is a leading-edge security firm specializing in crime prevention and detection for hundreds of companies nationwide.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 155 | ||||
“Blackstone Security Services is proud to offer a wide variety of security services tailored to satisfy specific client needs.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 145 | ||||
“Privately owned and operated, American Security has grown from an entrepreneurial start-up in 1975 to become one of the largest Southeastern-based security firms with over 3,500…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 143 | ||||
“For almost 40 years, VTI has been called upon and recognized by our industry for a full range of advanced physical security technologies.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 141 | ||||
“Phoenix Protective Corporation delivers proactive security solutions with highly trained, experienced security officers and outstanding customer protection.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | Lofton Security ServicePartial evidence | 135 | |||
“Founded in 1979, Lofton Security is the largest locally-owned, independent security and staffing company in the southern region.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | Nighthawk Security CompanyPartial evidence | 129 | |||
“Nighthawk Security Company is a privately owned and operated company headquartered in western Kentucky.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | Security ONEPartial evidence | 126 | |||
“Security One, Inc.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 1,189 healthcare security companies based in the United States
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Healthcare security companies based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 healthcare 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 the United States whose own description of what they do matches “healthcare 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 healthcare security 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, 11,561 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 3, 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.
Healthcare security companies by metro
- Healthcare security companies in Los Angeles37
- Healthcare security companies in New York30
Frequently asked
How many healthcare security companies are there based in the United States?
RevenueBase identified 1,189 healthcare security 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?
Allied Universal, headquartered in Rosemont, tops this list with the largest team on record.
Which city has the most healthcare security companies?
Los Angeles leads with 37 headquartered companies, followed by New York (30) and Miami (23).
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 11,561 verified decision-maker contacts tracked across these 1,189 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 3, 2026.
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Healthcare security companies by geography
- Healthcare security companies based in the United Kingdom
- Healthcare security companies based in France
- Healthcare security companies based in Brazil
- Healthcare security companies based in Canada
- Healthcare security companies based in the Netherlands
- Healthcare security companies based in Australia
- Healthcare security companies based in Germany
- Healthcare security companies based in Italy
- Healthcare security companies based in South Africa
- Healthcare security companies based in Spain
- Healthcare security companies based in Mexico
- Healthcare security companies based in Belgium
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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.
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