Company lists · Data refreshed September 2026
Top 21 Managed security services companies based in Los Angeles, United States
RevenueBase identified 57 managed security services companies headquartered in Los Angeles, United States as of September 2026 and tracks 920 professional contacts across them, including 83 with verified work emails. New York is the largest hub.
This list covers managed security services companies headquartered in Los Angeles, 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 21 largest managed security services 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 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 43 | ||||
“Combining robust human and AI powered cyber security measures with efficient IT management, our business delivers comprehensive solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 32 | ||||
“Allied International Security offers armed/unarmed Guards, Patrol Services, CCTV Surveillance for businesses, construction sites, schools, etc.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | Ollivier Managed Security Smart SitePartial 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 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | NetreadyIndirect evidence | 17 | |||
“At Netready, we help Southern California businesses take control of their IT and Cybersecurity, from infrastructure and cloud systems to monitoring, compliance, and prevention.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 6 | ||||
“At Xcape, Inc.®, we are a team of cybersecurity professionals specializing in building, connecting, supporting, and securing mission-critical infrastructure.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5 | ||||
“Mission: Treat People Well.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | LOW Ready ProtectionIndirect evidence | 5 | |||
“Low Ready Protection is a Veteran owned organization with over 20 years of industry experience.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 4 | ||||
“At Atypical, we're not your typical MSP.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 3 | ||||
“IntLös is a Privacy-focused Information Security Managed Service Provider (MSP), with over 15 years of experience providing simply elegant services tailored to exceed our client's…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 3 | ||||
“At Generative Strategies, we empower organizations to navigate the complex landscape of IT risk and cybersecurity with confidence and precision.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 3 | ||||
“Aable Security has been protecting Los Angeles since 1998 with one promise, dependable security you can trust.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | IT Cloudlink LLCStrong evidence | 3 | |||
“IT CloudLink LLC is a managed IT service and security provider specializing in cloud computing, cybersecurity and artificial intelligence solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | Q4 TechnologiesPartial evidence | 2 | |||
“Q4 Technologies: Your Virtual Security Organization (VSO) Q4 Technologies, a Virtual Security Organization (VSO).” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Wired WorldPartial evidence | 2 | |||
“We are here to offer our customers the best IT Services and Security solutions that help keep their businesses operational and cost effective.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | Qubric SecurityPartial evidence | 2 | |||
“Qubric Security is a cybersecurity consulting firm that helps organizations protect what they value most.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | US Armor GroupIndirect evidence | 2 | |||
“US Armor Group’s Executive Team’s background include former Elite Military Special Operation and Law Enforcement Special Unit members, giving us the ability to address the threats…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1 | ||||
“Alpha Private Protection is a leading security firm dedicated to providing exceptional protection and peace of mind to businesses across various industries.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1 | ||||
“At Beam Security, we are committed to safeguarding your digital world.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | WondersIndirect evidence | 1 | |||
“Welcome to Wonders!” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 21 of 57 managed security services companies based in Los Angeles, United States
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Managed security services companies based in Los Angeles, 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 Los Angeles, over 57 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 managed security services 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 “managed security services 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 managed security services 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, 83 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.
Managed security services companies by metro in the United States
- Managed security services companies in New York103
- Managed security services companies in Houston85
- Managed security services companies in Miami81
- Managed security services companies in Austin65
- Managed security services companies in Chicago64
- Managed security services companies in Dallas63
- Managed security services companies in Atlanta60
- Managed security services companies in Los Angeles57
- Managed security services companies in Tampa47
- Managed security services companies in San Francisco43
- Managed security services companies in Washington43
- Managed security services companies in Charlotte39
- Managed security services companies in Las Vegas38
- Managed security services companies in San Diego37
- Managed security services companies in Denver35
- Managed security services companies in Phoenix34
- Managed security services companies in Irvine30
- Managed security services companies in Arlington26
- Managed security services companies in Columbia26
- Managed security services companies in Orlando26
- Managed security services companies in Scottsdale25
- Managed security services companies in Wilmington25
Frequently asked
How many managed security services companies are there based in Los Angeles, United States?
RevenueBase identified 57 managed security services companies headquartered in Los Angeles, 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?
Professional Security Consultants, INC, headquartered in Los Angeles, tops this list with the largest team on record.
Which city has the most managed security services companies?
New York leads with 103 headquartered companies, followed by Houston (85) and Miami (81).
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 83 verified decision-maker contacts tracked across these 57 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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