Company lists · Data refreshed September 2026
Top 25 Security companies based in Los Angeles, United States
This directory lists 187 security companies based in Los Angeles, United States, with 2,532 contacts and 237 email addresses for business research and outreach. As of September 2026, New York is the single most-represented city among the companies on the list.
Security companies provide services, systems, or products that protect people, property, facilities, data, networks, or other assets from security threats. This list covers companies that provide security products or services, including physical security, cybersecurity, monitoring, access control, risk management, and related protection solutions. Ranked by team size, largest first. Data current as of 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 25 largest security companies based in Los Angeles, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 626 | ||||
“Professional Security Consultants, Inc.(PSC) is a world-class provider of security guard services, patrol, investigations, backgrounds, consulting, security screening & specialty…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 102 | ||||
“A security company committed to serving our clients at the highest level.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 91 | ||||
“Black Box Security Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 66 | ||||
“ACS Security has been serving as the go-to residential and business alarm and patrol service for the West Side of Los Angeles since 1983.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 57 | ||||
“Elite is an expert at Crime Prevention by transforming the security guard and asset monitoring industries by providing advanced machine learning algorithms and expert guarding…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 39 | ||||
“LSI is a full spectrum security solutions provider that specializes in manpower.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 32 | ||||
“Allied International Security offers armed/unarmed Guards, Patrol Services, CCTV Surveillance for businesses, construction sites, schools, etc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 30 | ||||
“We provide the foremost in private security guards and patrol services available today.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Ollivier Managed Security Smart SiteStrong evidence | 28 | |||
“Ollivier Corporation specializes in physical and networked security solutions to secure company assets, personnel, facilities, data, and to prevent fraud.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 26 | ||||
“Global Vision Security was founded by Xecutive Monster® with a vision for a security company considerably different from that of our competitors.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 23 | ||||
“Savage Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 22 | ||||
“California Panther Security Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | On Watch LLCIndirect evidence | 21 | |||
“On Watch LLC brings together over 200 years of US military, federal, state, and local law enforcement experience.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Safehouse Security SolutionsStrong evidence | 20 | |||
“Safehouse Security Solutions specializes in delivering elite, world-class security services tailored for corporations, high-profile individuals, and VIPs internationally.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Trasom Fire And SecurityIndirect evidence | 16 | |||
“We are a family owned and operated fire alarm protection company that operates primarily in Southern California.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 13 | ||||
“At Aventus Security, we are more than just a security service provider – we are your partners in safeguarding what matters most.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 13 | ||||
“Our Mission - APS is dedicated to providing quality, speed, and efficiency to everything we do.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | American Global Security, INCStrong evidence | 12 | |||
“American Global Security aims to place the bar high for personal protection solutions in California by using advanced methods, acquiring the greatest of expectations for our…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 11 | ||||
“Valian Group dba Armaplex Security is a Los Angeles based Security and Risk Company with a focus on filling gaps in the Security Industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | AAA Protective Security And Consulting Group INCIndirect evidence | 11 | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | MCM Integrated Systems, INCIndirect evidence | 10 | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | Securitech Security Services INCIndirect evidence | 10 | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 9 | ||||
“If you need safety, you need D&S Security!” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 8 | ||||
“CCTV Sales, CCTV Installation, Security Consultation Services, Armed & Unarmed Uniformed Security Guards, Marked Vehicle Patrol Services, and Virtual Security Guards.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 | ||||
“Mancini International is a corporate security company with a 30+ year track record of providing security for executives, heads of state, and corporate assets in 48 countries.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 187 security companies based in Los Angeles, United States
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Security companies based in Los Angeles, 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 Los Angeles, over 187 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 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 Los Angeles, United States whose own description of what they do matches “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 security companies, and records with no verified work email. Companies headquartered outside Los Angeles 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, 237 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 companies by metro in the United States
- Security companies in New York224
- Security companies in Los Angeles187
- Security companies in Houston184
- Security companies in Miami154
- Security companies in Chicago102
- Security companies in Atlanta99
- Security companies in Dallas99
- Security companies in Austin84
- Security companies in Phoenix84
- Security companies in Las Vegas67
- Security companies in Orlando66
- Security companies in San Antonio59
- Security companies in Tampa59
- Security companies in Charlotte56
- Security companies in Denver56
- Security companies in San Diego55
- Security companies in Indianapolis46
- Security companies in Sacramento46
- Security companies in San Francisco45
- Security companies in San Jose45
- Security companies in Jacksonville44
- Security companies in Seattle44
- Security companies in Baltimore42
- Security companies in Nashville37
- Security companies in Fort Lauderdale36
- Security companies in Columbus34
- Security companies in Memphis34
- Security companies in Portland34
- Security companies in Washington34
- Security companies in Philadelphia32
- Security companies in Raleigh32
- Security companies in Columbia31
- Security companies in Fort Worth31
- Security companies in Cincinnati30
- Security companies in Brooklyn29
- Security companies in Louisville28
- Security companies in Wilmington28
- Security companies in Albuquerque26
- Security companies in Richmond26
- Security companies in Riverside26
- Security companies in Springfield26
- Security companies in Boca Raton25
- Security companies in Boston25
- Security companies in Colorado Springs25
- Security companies in Irvine25
Frequently asked
How many security companies are based in Los Angeles, United States?
RevenueBase counts 187 security companies based in Los Angeles, United States on this list.
How many contacts and email addresses are available for security companies?
The list includes 2,532 contacts and 237 email addresses for security companies.
Which city has the most security companies on the list?
New York is the single most-represented city among the companies on the list.
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Security companies by geography
- Security companies based in the United States
- Security companies based in the United Kingdom
- Security companies based in Brazil
- Security companies based in France
- Security companies based in Canada
- Security companies based in Germany
- Security companies based in Italy
- Security companies based in Australia
- Security companies based in the Netherlands
- Security companies based in Mexico
- Security companies based in South Africa
- Security companies 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.