Company lists · Data refreshed September 2026
Top 8 Security firms based in Memphis, United States
RevenueBase identified 25 security firms headquartered in Memphis, United States as of September 2026 and tracks 1,024 professional contacts across them, including 65 with verified work emails. New York is the largest hub.
This list covers security firms headquartered in Memphis, 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 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 8 largest security firms based in Memphis, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 187 | ||||
“The Clarion Standard • Protecting clients – Valuing employees • Packaging interactive, responsive and comprehensive solutions for customers • Providing security officers that are…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Security ONEStrong evidence | 126 | |||
“Security One, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Frase Protection, INCIndirect evidence | 23 | |||
“At Frase Protection, we help Memphis businesses safeguard what matters most-their employees, property, and peace of mind.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 23 | ||||
“Black Flag Security LLC is a security service company based in Memphis, TN, that takes pride in being minority-woman-owned.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 20 | ||||
“Physical Security and Managed Service Solutions For Enterprise and Critical Infrastructure” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Interactive Security Electronics GroupStrong evidence | 5 | |||
“We are the most progressive Security Systems Integrator and Uniformed Protective Service provider in the nation.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | The Flying Locksmiths MemphisStrong evidence | 2 | |||
“The Flying Locksmiths, is an all-inclusive security provider.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Access Control Integration, INCIndirect evidence | 2 | |||
“Access Control Integration, Inc: When Failure of YOUR Access Control, Surveillance, Gate, Network or Alarm will NOT be Tolerated – ACI, Incorporated!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 8 of 25 security firms based in Memphis, United States
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Security firms based in Memphis, 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 Memphis, over 25 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 firms, 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 Memphis, United States whose own description of what they do matches “security firms”. 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 firms, and records with no verified work email. Companies headquartered outside Memphis 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, 65 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 firms by metro in the United States
- Security firms in New York189
- Security firms in Los Angeles170
- Security firms in Houston154
- Security firms in Miami124
- Security firms in Dallas85
- Security firms in Atlanta83
- Security firms in Chicago77
- Security firms in Phoenix72
- Security firms in Austin66
- Security firms in Las Vegas58
- Security firms in Charlotte49
- Security firms in Orlando49
- Security firms in Tampa47
- Security firms in Denver46
- Security firms in San Diego45
- Security firms in San Antonio42
- Security firms in San Francisco41
- Security firms in Baltimore35
- Security firms in Indianapolis34
- Security firms in Jacksonville34
- Security firms in Nashville34
- Security firms in San Jose33
- Security firms in Seattle33
- Security firms in Fort Lauderdale32
- Security firms in Sacramento32
- Security firms in Washington32
- Security firms in Philadelphia27
- Security firms in Portland26
- Security firms in Beverly Hills25
- Security firms in Columbus25
- Security firms in Fort Worth25
- Security firms in Memphis25
- Security firms in Raleigh25
Frequently asked
How many security firms are there based in Memphis, United States?
RevenueBase identified 25 security firms headquartered in Memphis, 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?
Clarion Security, headquartered in Memphis, tops this list with the largest team on record.
Which city has the most security firms?
New York leads with 189 headquartered companies, followed by Los Angeles (170) and Houston (154).
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 65 verified decision-maker contacts tracked across these 25 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 6, 2026.
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Security firms by geography
- Security firms based in the United States
- Security firms based in the United Kingdom
- Security firms based in Brazil
- Security firms based in France
- Security firms based in Canada
- Security firms based in Germany
- Security firms based in Italy
- Security firms based in Australia
- Security firms based in the Netherlands
- Security firms based in South Africa
- Security firms based in Mexico
- Security firms 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.