Company lists · Data refreshed October 2026

Top 25 Cybersecurity companies based in San Diego, United States

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 91 companies tracked

Our directory lists 91 cybersecurity companies based in San Diego, United States, with 1,554 professional contacts and 702 email addresses. The list was last updated in October 2026. Across the United States, New York is the largest hub for this category (358 companies); San Diego has 91.

Cybersecurity companies provide products and services that protect systems, networks, applications, devices, and data from unauthorized access, disruption, or misuse. This list covers companies that provide cybersecurity products, services, consulting, assessments, monitoring, incident response, or related protection for digital systems and data. Ranked by team size, largest first. Data current as of October 1, 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 Oct 1, 2026 86% judged on-target in blind review

91Companies

1,554Contacts tracked

702Verified emails

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The 25 largest cybersecurity companies based in San Diego, United States

Ranked by team size

Top 25 of 91 cybersecurity companies based in San Diego, United States, ranked by team size, largest first. Data refreshed Oct 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity companies: 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	Cybereason, A Levelblue Company	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	1,001-5,000	574 contacts →
	Strong evidence “Cybereason, a LevelBlue company, is a global cybersecurity leader delivering advanced endpoint detection and response (EDR) and industry recognized consulting services to support…” Source: RevenueBase Database · checked Oct 1, 2026
2	Eset North America	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	180 contacts →
	Indirect evidence “For more than 30 years we have been here helping to watch over and protect progress.” Source: RevenueBase Database · checked Oct 1, 2026
3	Ausgar Technologies INC	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	148 contacts →
	Strong evidence “AUSGAR is a company of smart, innovative technical team members who can out-think problems faced by our customers in the cybersecurity, experimentation and engineering services…” Source: RevenueBase Database · checked Oct 1, 2026
4	Forward Slope, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	108 contacts →
	Indirect evidence “Forward Slope is now part of Lyntris.” Source: RevenueBase Database · checked Oct 1, 2026
5	Triden Group	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	46 contacts →
	Strong 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 Oct 1, 2026
6	Infracore	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	40 contacts →
	Strong evidence “Infracore is a best-in-class Cybersecurity and IT Support Services firm.” Source: RevenueBase Database · checked Oct 1, 2026
7	Trustthink	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	27 contacts →
	Strong evidence “Founded in 2018, TrustThink provides cybersecurity engineering and system-of-systems assurance for complex, connected products and platforms.” Source: RevenueBase Database · checked Oct 1, 2026
8	Compuone	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	22 contacts →
	Indirect evidence “We are now serving IT needs in the greater Chicago area!” Source: RevenueBase Database · checked Oct 1, 2026
9	Polyswarm	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	20 contacts →
	Indirect evidence “PolySwarm is a crowdsourced threat intelligence marketplace that provides a more effective way to detect, analyze and respond to the latest threats, the ones more likely to go…” Source: RevenueBase Database · checked Oct 1, 2026
10	Garantir Cybersecurity	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	14 contacts →
	Strong evidence “Garantir is a cybersecurity company that provides advanced cryptographic solutions to the enterprise.” Source: RevenueBase Database · checked Oct 1, 2026
11	Taranet	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	1-10	14 contacts →
	Indirect evidence “Cyber Security Risk Management Taranet provides SME support to identify, mitigate, and manage cyber security risks.” Source: RevenueBase Database · checked Oct 1, 2026
12	Gryphon Online Safety, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	13 contacts →
	Indirect evidence “San Diego startup that's revolutionizing home and small business network protection with AI powered cyber-security platform.” Source: RevenueBase Database · checked Oct 1, 2026
13	Holocom, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 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 Oct 1, 2026
14	Integrated Planet, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	12 contacts →
	Indirect evidence “INTEGRATED PLANET INC is an information technology and services company based out of 10755 SCRIPPS POWAY PKWY, SAN DIEGO, California, United States.” Source: RevenueBase Database · checked Oct 1, 2026
15	Cybercatch	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	11 contacts →
	Strong evidence “CyberCatch provides an innovative cybersecurity Software-as-a-Service (SaaS) platform designed for SMBs.” Source: RevenueBase Database · checked Oct 1, 2026
16	Morado	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	10 contacts →
	Indirect evidence “There is more cyber threat intelligence available today than ever before, but the challenge is knowing what is actionable and having the tools to act on it.” Source: RevenueBase Database · checked Oct 1, 2026
17	Tbdcyber	Strong evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	9 contacts →
	Strong evidence “TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.” Source: RevenueBase Database · checked Oct 1, 2026
18	Trustfour Technologies	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	9 contacts →
	Indirect evidence “TrustFour is a pioneer in workload and non-human identity security, providing innovative solutions for compliance, remediation, post quantum resiliency, and advanced threat…” Source: RevenueBase Database · checked Oct 1, 2026
19	Optimeyes AI	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	7 contacts →
	Indirect evidence “OptimEyes.ai is a unique AI-powered, on-demand SaaS solution for cyber-security, data privacy and compliance risk modeling.” Source: RevenueBase Database · checked Oct 1, 2026
20	Dispatch Tech, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	6 contacts →
	Indirect evidence “At Dispatch Tech, we're dedicated to securing your digital world.” Source: RevenueBase Database · checked Oct 1, 2026
21	Skycubed	Indirect evidence	San Diego, United StatesHQ checked Oct 1, 2026	1-10	6 contacts →
	Indirect evidence “Skycubed is a group of experienced software developers and infrastructure specialists focused on cloud analytics and computer network defense.” Source: RevenueBase Database · checked Oct 1, 2026
22	Hannulawells	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	1-10	6 contacts →
	Indirect evidence “HannulaWells is a cyber security services provider, servicing enterprise level environments to SMB's.” Source: RevenueBase Database · checked Oct 1, 2026
23	Aegis Innovators	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	11-50	6 contacts →
	Indirect evidence “AEGIS INNOVATORS is a Microsoft partner located in Southern California that partners with other Microsoft service providers and assists organizations throughout the United States.” Source: RevenueBase Database · checked Oct 1, 2026
24	DB Cybertech	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	51-200	5 contacts →
	Indirect evidence “DB CyberTech innovates predictive data loss prevention for structured data.” Source: RevenueBase Database · checked Oct 1, 2026
25	Fylaxcyber INC	Indirect evidence	San Diego, CA, United StatesHQ checked Oct 1, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Oct 1, 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: cybersecurity companies. 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 cybersecurity companies.
Partial evidence: Its own public description names part of cybersecurity companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity companies. 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 91 cybersecurity companies based in San Diego, United States

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Cybersecurity companies based in San Diego, United States at a glance

As of Oct 1, 2026

45.2%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 91 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 cybersecurity companies, 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 “cybersecurity companies”. 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 cybersecurity companies), 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 cybersecurity companies, 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, 702 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 October 1, 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.

Cybersecurity companies by metro in the United States

Frequently asked

How many cybersecurity companies are in the directory?

The directory lists 91 cybersecurity companies based in San Diego, United States.

Which city in the United States has the most cybersecurity companies?

New York leads the United States with 358 headquartered companies, followed by San Francisco (190) and Austin (187). San Diego has 91.

How many contacts are available for cybersecurity companies?

The directory includes 1,554 professional contacts and 702 email addresses for the listed cybersecurity companies.

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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.