Company lists · Data refreshed September 2026
Top 10 Private security companies based in Denver, United States
RevenueBase identified 26 private security companies headquartered in Denver, United States as of September 2026 and tracks 2,065 professional contacts across them, including 78 with verified work emails. Los Angeles is the largest hub.
This list covers private security companies headquartered in Denver, 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.
The 10 largest private security companies based in Denver, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,727 | ||||
“HSS is now Tarian!” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | Twin City Security, INCPartial evidence | 157 | |||
“Quality armed and unarmed security officer services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 64 | ||||
“Advanced Professional Security (APS) is a national security guard and patrol firm.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Scout SecurityStrong evidence | 19 | |||
“Scout Security (SS) is a private security business committed to closing the gap between law enforcement and security by providing targeted patrols and dedicated guards in your…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Pontem SecurityPartial evidence | 10 | |||
“Our security experience goes back more than a decade and we have worked all jobs - large and small.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | TRT DefensePartial evidence | 9 | |||
“TRT Defense provides security professionals who are state licensed, well qualified, experienced and committed to exceptional customer service.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | Viplomat ProtectionIndirect evidence | 6 | |||
“We are an executive protection firm based in Colorado that offers risk mitigation and physical protection for clients who might be exposed to elevated risks due to status, net…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | Gen1 ProtectionIndirect evidence | 4 | |||
“Gen1 Protection is a company based out of 4819 King St, Denver, Colorado, United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 2 | ||||
“At Auctus Security, our mission is to protect and empower our clients through integrity, professionalism, and modern security solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | Mpakt Group LLCPartial evidence | 2 | |||
“Personal security, risk management, and training/advisory is our mission.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 10 of 26 private security companies based in Denver, United States
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Private security companies based in Denver, United States at a glance
As of Sep 5, 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 Denver, over 26 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 private 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 Denver, United States whose own description of what they do matches “private 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 private security companies, and records with no verified work email. Companies headquartered outside Denver 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, 78 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.
Private security companies by metro in the United States
- Private security companies in Los Angeles109
- Private security companies in New York109
- Private security companies in Houston88
- Private security companies in Miami62
- Private security companies in Chicago53
- Private security companies in Atlanta50
- Private security companies in Dallas50
- Private security companies in Austin39
- Private security companies in Las Vegas37
- Private security companies in Phoenix34
- Private security companies in Orlando28
- Private security companies in Denver26
- Private security companies in Tampa26
Frequently asked
How many private security companies are there based in Denver, United States?
RevenueBase identified 26 private security companies headquartered in Denver, 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?
HSS, headquartered in Denver, tops this list with the largest team on record.
Which city has the most private security companies?
Los Angeles leads with 109 headquartered companies, followed by New York (109) and Houston (88).
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 78 verified decision-maker contacts tracked across these 26 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.
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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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