Company lists · Data refreshed September 2026
Top 25 Healthcare security services based in the United States
RevenueBase identified 290 healthcare security services headquartered in the United States as of September 2026 and tracks 12,538 professional contacts across them, including 1,534 with verified work emails. Los Angeles is the largest hub.
This list covers healthcare security services 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.
The 25 largest healthcare security services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,038 contacts → | ||||
Partial evidence “Excelsior Defense is a security and investigations company based out of St.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,062 contacts → | ||||
Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 554 contacts → | ||||
Indirect evidence “Ramp Health is a leading provider of clinical, wellbeing, and safety solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 376 contacts → | ||||
Indirect evidence “Elite staffs events and facilities with professionals who create a safe and secure environment.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 370 contacts → | ||||
Partial evidence “DOCS Health is an advanced healthcare company with one mission: Provide access to comprehensive healthcare and innovative solutions for schools, military, government agencies…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 207 contacts → | ||||
Partial evidence “Clearwater serves a diverse and growing base of customers across the healthcare ecosystem, including several of the nation’s largest health systems as well as a large universe of…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 206 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 165 contacts → | ||||
Partial evidence “Security Guard and Technology Services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 162 contacts → | ||||
Partial evidence “CloudWave is a full-service cybersecurity and cloud services provider built exclusively for healthcare.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 160 contacts → | ||||
Indirect evidence “Companion Data Services, LLC (CDS), a privately held company, offers secure systems development and managed hosting services specializing in the health care industry.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 155 contacts → | ||||
Partial evidence “Blackstone Security Services is proud to offer a wide variety of security services tailored to satisfy specific client needs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 143 contacts → | ||||
Partial evidence “Fortified is Healthcare’s Cybersecurity Partner® – protecting patient data and reducing risk throughout the healthcare ecosystem.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 142 contacts → | ||||
Indirect evidence “At Kellington Protection Service “KPS”, we understand what is necessary to handle the new challenges and responsibilities constantly evolving in commercial and residential…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 136 contacts → | ||||
Partial evidence “Founded in 1979, Lofton Security is the largest locally-owned, independent security and staffing company in the southern region.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 126 contacts → | ||||
Partial evidence “Security One, Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 123 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 112 contacts → | ||||
Partial evidence “Brantley Security provides quality security services through quick response, experienced management and an unmatched attention to detail.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 110 contacts → | ||||
Partial evidence “Allstar Security & Consulting is a full service, licensed, bonded and insured security services company.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 99 contacts → | ||||
Strong evidence “We provide customized security programs to Fortune 500s, healthcare, educational facilities, governments, small to local businesses and communities.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 97 contacts → | ||||
Partial evidence “Executive Security Systems is now GuardTexas!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 85 contacts → | ||||
Partial evidence “Nationwide Guard Services, Inc, a family-owned business, prioritizes our clients with hands-on management and active involvement in delivering promised security services.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 82 contacts → | ||||
Partial evidence “Security USA®, Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 73 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 72 contacts → | ||||
Partial evidence “About Us Quality Security is a proudly American-owned, locally operated security firm headquartered in New Jersey, with active licenses in New Jersey, Texas, Florida, Georgia…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
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: healthcare security services. 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 healthcare security services.
- Partial evidence
- Its own public description names part of healthcare security services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name healthcare security services. 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 290 healthcare security services based in the United States
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Healthcare security services based in the United States at a glance
As of Sep 28, 2026Companies by employee count
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 290 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 healthcare security services, 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 “healthcare security services”. 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 healthcare security services), 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 healthcare security services, 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, 1,534 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.
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 healthcare security services, 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 healthcare security services are there based in the United States?
RevenueBase identified 290 healthcare security services 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?
Unemployed, headquartered in St. Petersburg, tops this list with the largest team on record.
Which city has the most healthcare security services?
Los Angeles leads with 12 headquartered companies, followed by Chicago (6) and New York (6).
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 1,534 verified decision-maker contacts tracked across these 290 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.
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