Company lists · Data refreshed September 2026

Top 25 Enterprise security firms based in San Diego, United States

Name: Enterprise security firms based in San Diego, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 59 companies tracked

RevenueBase identified 59 enterprise security firms headquartered in San Diego, United States as of September 2026 and tracks 435 professional contacts across them, including 157 with verified work emails. Across the United States, New York is the largest hub for this category (191 companies); San Diego has 59.

This list covers enterprise security firms headquartered in San Diego, 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 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

59Companies

435Contacts tracked

157Verified emails

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The 25 largest enterprise security firms based in San Diego, United States

Ranked by team size

Top 25 of 59 enterprise security firms based in San Diego, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise security firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NTH Generation Computing	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	89 contacts →
	Partial evidence “Since 1991, Nth Generation has provided industry leading, consultative IT services, encompassing a suite of IT and security solutions.” Source: RevenueBase Database · checked Sep 28, 2026
2	Templar Shield	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	49 contacts →
	Partial evidence “Templar Shield is a specialized risk, security, identity and AI governance advisory firm helping organizations operate with confidence in an increasingly automated, AI-driven…” Source: RevenueBase Database · checked Sep 28, 2026
3	Triden Group	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	46 contacts →
	Indirect evidence “Providing the Most Innovative and Intelligent Defense Available With the growth and evolution of cyber threats, cybersecurity has been thrust into the forefront of modern…” Source: RevenueBase Database · checked Sep 28, 2026
4	Taranet	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “Cyber Security Risk Management Taranet provides SME support to identify, mitigate, and manage cyber security risks.” Source: RevenueBase Database · checked Sep 28, 2026
5	Holocom, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “Holocom is the leading solutions provider of Protective Distribution Systems (PDS) for classified networks such as SIPRNet, JWICS, and other networks transmitting highly sensitive…” Source: RevenueBase Database · checked Sep 28, 2026
6	Tbdcyber	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.” Source: RevenueBase Database · checked Sep 28, 2026
7	Electro Specialty Systems	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Founded by brothers Dan and Bill Brault in 1987, Electro Specialty Systems is an electronic security integrator based in San Diego, California.” Source: RevenueBase Database · checked Sep 28, 2026
8	Dispatch Tech, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “At Dispatch Tech, we're dedicated to securing your digital world.” Source: RevenueBase Database · checked Sep 28, 2026
9	Hannulawells	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “HannulaWells is a cyber security services provider, servicing enterprise level environments to SMB's.” Source: RevenueBase Database · checked Sep 28, 2026
10	Nexify	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “Our Vision Nexify helps clients achieve operational efficiency, data security, and strategic tech integration, focusing on Artificial Intelligence, Data Governance, and…” Source: RevenueBase Database · checked Sep 28, 2026
11	DB Cybertech	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	5 contacts →
	Indirect evidence “DB CyberTech innovates predictive data loss prevention for structured data.” Source: RevenueBase Database · checked Sep 28, 2026
12	Fylaxcyber INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
13	SAN Diego IT Pros	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “IT Consulting firm based in San Diego, offering consulting on security, network management, infrastructure, cloud services, and more.” Source: RevenueBase Database · checked Sep 28, 2026
14	Nextwave Solutions, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “IT SECURITY ASSESSMENTS One of our goals is to empower businesses defend their critical data and sensitive information assets from the threat of cyber attacks.” Source: RevenueBase Database · checked Sep 28, 2026
15	Somerset Recon, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
16	The Kika Company	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “We are a valued added reseller for Security consulting Company that provides consulting services to Software, IT, Cyber Security, Information Security, DoD, Retail, Manufacturing…” Source: RevenueBase Database · checked Sep 28, 2026
17	Basic Business IT Consulting Services	Indirect evidence	San Diego, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Founded in 2013 on the IDEA to provide Basic Foundational IT Solutions and Support with an Excellent Customer Experience.” Source: RevenueBase Database · checked Sep 28, 2026
18	Prometheus Cybersecurity	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Prometheus Cybersecurity is an information security company based out of San Diego, California.” Source: RevenueBase Database · checked Sep 28, 2026
19	Taro Technology LLC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Providing IT / security and consulting services to medium sized business” Source: RevenueBase Database · checked Sep 28, 2026
20	Cyclic Security Solutions	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Cyclic Security Solutions (CS2) is a leading provider of Cyber Security Engineering, Program Management and Systems Integration by providing technical services and solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Executive Advisors Group, LLC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Executive Advisors Group, LLC helps organizations address security, privacy, risk, and other governance issues in a manner that is both pragmatic and effective.” Source: RevenueBase Database · checked Sep 28, 2026
22	Cybersecurity Consulting Company	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Atlant Security engineers the cybersecurity posture that enterprise procurement teams approve on sight.” Source: RevenueBase Database · checked Sep 28, 2026
23	Bitchip	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Providing managed IT services with an emphasis on cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
24	Geeky Clean Technology	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Geeky Clean Technology (GCT) is San Diego’s premier ethical IT consultancy, serving Pacific Beach, La Jolla, and Mount Soledad since 2006.” Source: RevenueBase Database · checked Sep 28, 2026
25	Retrofuture Innovations LLC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Our firm specializes in Data Privacy, Cybersecurity & Network Consulting Services.” Source: RevenueBase Database · checked Sep 28, 2026

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: enterprise security firms. 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 enterprise security firms.
Partial evidence: Its own public description names part of enterprise security firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise security firms. 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 59 enterprise security firms based in San Diego, United States

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Enterprise security firms based in San Diego, United States at a glance

As of Sep 28, 2026

36.1%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 59 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 enterprise security firms, 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 San Diego, United States whose own description of what they do matches “enterprise security firms”. 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 enterprise security firms), 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 enterprise security firms, and records with no verified work email. Companies headquartered outside San Diego 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, 157 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 28, 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.

Enterprise security firms by metro in the United States

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 enterprise security firms, 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 enterprise security firms are there based in San Diego, United States?

RevenueBase identified 59 enterprise security firms headquartered in San Diego, 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?

NTH Generation Computing, headquartered in San Diego, tops this list with the largest team on record.

Which city in the United States has the most enterprise security firms?

New York leads the United States with 191 headquartered companies, followed by Austin (121) and Houston (121). San Diego has 59.

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 157 verified decision-maker contacts tracked across these 59 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 28, 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.