Company lists · Data refreshed September 2026
Top 25 Security service providers based in Houston, United States
RevenueBase identified 119 security service providers headquartered in Houston, United States as of September 2026 and tracks 1,499 professional contacts across them, including 198 with verified work emails. New York is the largest hub.
This list covers security service providers headquartered in Houston, 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 14, 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 security service providers based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 223 contacts → | ||||
Strong evidence “5 STAR Event Services is a Licensed Private Security Company that specializes in uniformed guards and specialty event security and staffing in the sports and entertainment…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 128 contacts → | ||||
Strong evidence “Bulldog Security Services is a family-owned national ADT Authorized Dealer with over a decade of industry experience.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 121 contacts → | ||||
Indirect evidence “OFF DUTY SERVICES, INC.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 88 contacts → | ||||
Strong evidence “Mission Statement “Always Exceed Expectations” ADM Security Solutions exceeds expectations by providing innovative, comprehensive security solutions incorporating high value…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 59 contacts → | ||||
Strong evidence “RAE Security is a customer centric Security business.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 45 contacts → | ||||
Strong evidence “We provide professional, licensed, and uniformed security guards and vehicle patrol.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 43 contacts → | ||||
Strong evidence “The premier security company of Texas where customers come first.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 33 contacts → | ||||
Strong evidence “All Campus Security globally offers customized integrated security solutions including video surveillance, door access control, intrusion detection, fire protection, structured…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 23 contacts → | ||||
Strong evidence “City Security Services is a state-licensed security guard service in Houston, TX, and we are committed to protecting both our clients and their interests.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 20 contacts → | ||||
Strong evidence “Security has become a current-day necessity.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 19 contacts → | ||||
Strong evidence “OMNI Fire and Security was started in 1987 to provide a locally owned option to the "big box" national firms.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 16 contacts → | ||||
Strong evidence “International Guard Services provides professional and reliable security officers to multiple industries.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 contacts → | ||||
Indirect evidence “Strategic Protection Solutions is a Texas-based company that specializes in providing peace-of-mind tools and resources to a broad list of industries.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 14 contacts → | ||||
Strong evidence “TRANSNET is a service provider for electronic security solutions as well as an IT expert that provides assessment, designs, installations, monitoring and maintenance to Security &…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 14 contacts → | ||||
Indirect evidence “Always Ready to Answer the Call Whether you are the property manager of an apartment complex, shopping mall, or other facilities, you may at some point need the services of a…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 13 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 12 contacts → | ||||
Strong evidence “We are a security solutions firm in Houston specializing in monitored video surveillance and job site security.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 10 contacts → | ||||
Strong evidence “Global Security and Investigative Services is a Texas based security guard company providing professional armed and unarmed security officers, private investigations, and risk…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 contacts → | ||||
Strong evidence “A BETTER COMPANY TO WORK FOR We believe that providing protection and security is a profession worthy of respect.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 contacts → | ||||
Strong evidence “GuardianArc International is a global services company that provides chain of custody management, intellectual property protection, travel security support and specialized…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 9 contacts → | ||||
Strong evidence “For over 20 years, 24 & 7 Security & Investigation has developed a reputation as one of Houston’s top security services.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Strong evidence “Novo Communications is comprised of experienced professionals - factory-trained, certified, and dedicated to installing/servicing your security & life safety needs.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 7 contacts → | ||||
Strong evidence “Leveraging patented technology with experience, Automated Security Integrated Solutions makes it possible for companies with recurring guard spend to reduce cost significantly by…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 contacts → | ||||
Strong evidence “Lincoln’s security solutions help deter crime and improve police response.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 6 contacts → | ||||
Strong evidence “At Megasystems Security, we do it all!” Source: RevenueBase Database · checked Sep 14, 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: security service 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 security service providers.
- Partial evidence
- Its own public description names part of security service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security service 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 119 security service providers based in Houston, United States
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Security service providers based in Houston, United States at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 119 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 service 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 Houston, United States whose own description of what they do matches “security service 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 security service 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 security service providers, and records with no verified work email. Companies headquartered outside Houston 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, 198 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 14, 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 service providers by metro in the United States
- Security service providers in New York142
- Security service providers in Los Angeles125
- Security service providers in Houston119
- Security service providers in Miami87
- Security service providers in Dallas74
- Security service providers in Chicago58
- Security service providers in Atlanta56
- Security service providers in Austin50
- Security service providers in Phoenix48
- Security service providers in Las Vegas40
- Security service providers in Denver37
- Security service providers in Orlando31
- Security service providers in San Antonio31
- Security service providers in Tampa31
- Security service providers in Baltimore30
- Security service providers in San Diego29
- Security service providers in Charlotte28
- Security service providers in Sacramento27
- Security service providers in Nashville26
- Security service providers in San Jose25
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 security service 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 security service providers are there based in Houston, United States?
RevenueBase identified 119 security service providers headquartered in Houston, 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?
5 Star Event Services, headquartered in Houston, tops this list with the largest team on record.
Which city has the most security service providers?
New York leads with 142 headquartered companies, followed by Los Angeles (125) and Houston (119).
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 198 verified decision-maker contacts tracked across these 119 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 14, 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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