Company lists · Data refreshed October 2026

Top 25 Cybersecurity firms based in San Diego, United States

Name: Cybersecurity 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 Oct 1, 2026 92 companies tracked

RevenueBase identified 92 company matches for cybersecurity firms associated with San Diego, United States as of October 2026 and tracks 1,598 professional contacts across them, including 732 with verified work emails. Across the United States, New York is the largest hub for this category (358 companies); San Diego has 92.

This list covers company matches for cybersecurity firms associated with San Diego, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built

92Companies

1,598Contacts tracked

732Verified emails

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

Ranked by team size

Top 25 of 92 company matches for cybersecurity firms based in San Diego, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Cybereason, A Levelblue Company	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	574 contacts →
	Exact match “Cybereason, a LevelBlue company, is a global cybersecurity leader delivering advanced endpoint detection and response (EDR) and industry recognized consulting services to support…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Eset North America	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	180 contacts →
	Exact match “For more than 30 years we have been here helping to watch over and protect progress.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	Ausgar Technologies INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	148 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	Forward Slope, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	108 contacts →
	Exact match “Forward Slope is now part of Lyntris.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Templar Shield	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	49 contacts →
	Exact match “Templar Shield is a specialized risk, security, identity and AI governance advisory firm helping organizations operate with confidence in an increasingly automated, AI-driven…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	Triden Group	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	46 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Infracore	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	40 contacts →
	Exact match “Infracore is a best-in-class Cybersecurity and IT Support Services firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Trustthink	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	27 contacts →
	Exact match “Founded in 2018, TrustThink provides cybersecurity engineering and system-of-systems assurance for complex, connected products and platforms.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	Compuone	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	22 contacts →
	Exact match “We are now serving IT needs in the greater Chicago area!” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Polyswarm	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	20 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Garantir Cybersecurity	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	14 contacts →
	Exact match “Garantir is a cybersecurity company that provides advanced cryptographic solutions to the enterprise.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Taranet	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	1-10	14 contacts →
	Exact match “Cyber Security Risk Management Taranet provides SME support to identify, mitigate, and manage cyber security risks.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Gryphon Online Safety, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	13 contacts →
	Exact match “San Diego startup that's revolutionizing home and small business network protection with AI powered cyber-security platform.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Holocom, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	13 contacts →
	Exact match “Holocom is the leading solutions provider of Protective Distribution Systems (PDS) for classified networks such as SIPRNet, JWICS, and other networks transmitting highly sensitive…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Integrated Planet, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	12 contacts →
	Exact match “INTEGRATED PLANET INC is an information technology and services company based out of 10755 SCRIPPS POWAY PKWY, SAN DIEGO, California, United States.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	Cybercatch	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	11 contacts →
	Exact match “CyberCatch provides an innovative cybersecurity Software-as-a-Service (SaaS) platform designed for SMBs.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Morado	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	10 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	Tbdcyber	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	9 contacts →
	Exact match “TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Trustfour Technologies	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	9 contacts →
	Exact match “TrustFour is a pioneer in workload and non-human identity security, providing innovative solutions for compliance, remediation, post quantum resiliency, and advanced threat…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Optimeyes AI	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	7 contacts →
	Exact match “OptimEyes.ai is a unique AI-powered, on-demand SaaS solution for cyber-security, data privacy and compliance risk modeling.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Dispatch Tech, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	6 contacts →
	Exact match “At Dispatch Tech, we're dedicated to securing your digital world.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Skycubed	Exact match	San Diego, United StatesHQ recorded Oct 1, 2026	1-10	6 contacts →
	Exact match “Skycubed is a group of experienced software developers and infrastructure specialists focused on cloud analytics and computer network defense.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Hannulawells	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	1-10	6 contacts →
	Exact match “HannulaWells is a cyber security services provider, servicing enterprise level environments to SMB's.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Aegis Innovators	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	11-50	6 contacts →
	Exact match “AEGIS INNOVATORS is a Microsoft partner located in Southern California that partners with other Microsoft service providers and assists organizations throughout the United States.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	DB Cybertech	Exact match	San Diego, CA, United StatesHQ recorded Oct 1, 2026	51-200	5 contacts →
	Exact match “DB CyberTech innovates predictive data loss prevention for structured data.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cybersecurity firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 92 cybersecurity firms based in San Diego, United States

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

As of Oct 1, 2026

45.8%Verified-email coverage

17.4Average 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 92 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with San Diego, United States whose business descriptions match “cybersecurity firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 732 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Cybersecurity firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “cybersecurity firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity firms are there based in San Diego, United States?

RevenueBase identified 92 company matches for cybersecurity firms associated with San Diego, United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Cybereason, A Levelblue Company tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

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

New York leads the United States with 358 company records, followed by Austin (182) and San Francisco (182). San Diego has 92.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 732 professional contacts with verified work emails tracked across these 92 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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.