Company lists · Data refreshed September 2026

Top 23 Managed security service providers based in Irvine, United States

Name: Managed security service providers based in Irvine, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 36 companies tracked

RevenueBase identified 36 managed security service providers headquartered in Irvine, United States as of September 2026 and tracks 1,052 professional contacts across them, including 451 with verified work emails. New York is the largest hub.

This list covers managed security service providers headquartered in Irvine, 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

36Companies

1,052Contacts tracked

451Verified emails

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The 23 largest managed security service providers based in Irvine, United States

Ranked by team size

Top 23 of 36 managed security service providers based in Irvine, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names managed security service providers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	CalltekIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	5,001-10,000	290
	“For more than two decades, CallTek has been a global leader in delivering secure, compliant, and reliable white-label technical support services.” Source: company website · checked Sep 5, 2026
2	TevoraPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	201-500	199
	“Founded in 2003, Tevora is a specialized management consultancy focused on cybersecurity, risk, and compliance services.” Source: company website · checked Sep 5, 2026
3	ProficioStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	182
	“Proficio is a world-class Managed Security Service Provider (MSSP) providing managed detection and response solutions, 24×7 security monitoring and advanced data breach prevention…” Source: company website · checked Sep 5, 2026
4	AlvakaPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	57
	“Alvaka manages and secures the IT infrastructure of mid-market and enterprise-class companies, enabling them to operate seamlessly in the non-stop, mission-critical world that has…” Source: company website · checked Sep 5, 2026
5	LmntrixIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	57
	“At LMNTRIX, we help organizations take control of their cybersecurity by delivering advanced threat detection, proactive response, and deep adversarial insights-without the…” Source: company website · checked Sep 5, 2026
6	TechheightsPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	29
	“TechHeights is an award-winning Managed Service Provider delivering enterprise-grade IT, cybersecurity, and cloud solutions to businesses across Orange County, Los Angeles, and…” Source: company website · checked Sep 5, 2026
7	Next IT SolutionsIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	28
	“Protecting & Optimizing Orange County and Nationwide Businesses for 14+ Years IT and Cyber Support in Irvine, CA Next IT Solutions partners with organizations in delivering state…” Source: company website · checked Sep 5, 2026
8	Right Click, INCIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	27
	“Right Click is an Orange County based IT Consulting firm.” Source: company website · checked Sep 5, 2026
9	Esecurity SolutionsIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	20
	“eSecurity Solutions is a One-Stop Cybersecurity Solution provider to businesses.” Source: company website · checked Sep 5, 2026
10	Greenlight CyberIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	18
	“Welcome to Greenlight Cyber, where we merge creativity and strategic expertise with cutting-edge technology to secure and elevate your business.” Source: company website · checked Sep 5, 2026
11	Dfnd Security, INCPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	15
	“Enterprise clients have counted on DFND Security, Inc.” Source: company website · checked Sep 5, 2026
12	Atomic Technology SolutionsPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	15
	“At Atomic Technology Solutions, we provide organizations with reliable, enterprise-grade Managed IT services and Cybersecurity solutions that minimize risk and ensure operational…” Source: company website · checked Sep 5, 2026
13	CynexlinkIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	13
	“Welcome to Cynexlink, your premier global IT and cybersecurity partner.” Source: company website · checked Sep 5, 2026
14	CSP NetworksStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	10
	“CSP Networks is an award-winning IT Managed Service Provider (MSP), that combines strategic advisory, technical and cyber security expertise, and the ability to effectively…” Source: company website · checked Sep 5, 2026
15	Linutech SolutionsIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	8
	“At our company, we provide enterprises with cutting-edge, fully integrated IT solutions tailored to their specific needs.” Source: company website · checked Sep 5, 2026
16	Linkpro TechnologiesPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	1-10	6
	“Linkpro Technologies is a computer & network security company based out of P.O.” Source: company website · checked Sep 5, 2026
17	Gibb Network Solutions INCIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	1-10	5
	Source: company website · checked Sep 5, 2026
18	Technology's EdgeStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	1-10	5
	“Technology’s Edge provides a high level of IT Managed Security Services to businesses in the Greater LA & Orange County Area.” Source: company website · checked Sep 5, 2026
19	Altius It, INCPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	3
	“We help organizations identify cyber risk, prevent attacks, and meet security and compliance requirements.” Source: company website · checked Sep 5, 2026
20	Vsecops, INCIndirect evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	2
	“We help companies make better use of existing cybersecurity investments.” Source: company website · checked Sep 5, 2026
21	Cybermack EnterprisesStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	1
	“Industry: Cybersecurity \| Headquarters: Irvine, CA Website: About Us Cybermack Enterprises is a premier Managed Security Services Provider (MSSP) offering end-to-end cybersecurity…” Source: company website · checked Sep 5, 2026
22	Cmsp- Managed IT ServicesPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	11-50	1
	“CMSP is a Managed IT Service Provider.” Source: company website · checked Sep 5, 2026
23	NetsyntropyStrong evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	1-10	1
	“IT Security Assessments and Project Services to Managed Services, our experts are here to help.” Source: company website · checked Sep 5, 2026

Showing 23 of 36 managed security service providers based in Irvine, United States

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Managed security service providers based in Irvine, United States at a glance

As of Sep 5, 2026

11-50Median size (employees)

New YorkLargest hub · 200 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

5,001-10,000

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 Irvine, over 36 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 service providers, 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 Irvine, United States whose own description of what they do matches “managed security service providers”. 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 service providers, and records with no verified work email. Companies headquartered outside Irvine 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, 451 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 service providers by metro in the United States

Frequently asked

How many managed security service providers are there based in Irvine, United States?

RevenueBase identified 36 managed security service providers headquartered in Irvine, 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?

Calltek, headquartered in Irvine, tops this list with the largest team on record.

Which city has the most managed security service providers?

New York leads with 200 headquartered companies, followed by Houston (120) and Austin (117).

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 451 verified decision-maker contacts tracked across these 36 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.