Company lists · Data refreshed September 2026

Top 25 Cybersecurity startups based in San Diego, United States

Name: Cybersecurity startups 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 14, 2026 63 companies tracked

RevenueBase identified 63 cybersecurity startups headquartered in San Diego, United States as of September 2026 and tracks 331 professional contacts across them, including 90 with verified work emails. New York is the largest hub.

This list covers cybersecurity startups 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 14, 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 14, 2026 86% judged on-target in blind review

63Companies

331Contacts tracked

90Verified emails

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

Ranked by team size

Top 25 of 63 cybersecurity startups based in San Diego, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity startups: 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	Triden Group	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	46 contacts →
	Partial 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 14, 2026
2	Polyswarm	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 Sep 14, 2026
3	Taranet	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 Sep 14, 2026
4	Gryphon Online Safety, INC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	13 contacts →
	Partial evidence “San Diego startup that's revolutionizing home and small business network protection with AI powered cyber-security platform.” Source: RevenueBase Database · checked Sep 14, 2026
5	Cybercatch	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	11 contacts →
	Partial evidence “CyberCatch provides an innovative cybersecurity Software-as-a-Service (SaaS) platform designed for SMBs.” Source: RevenueBase Database · checked Sep 14, 2026
6	Morado	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 Sep 14, 2026
7	Tbdcyber	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	9 contacts →
	Partial evidence “TBDCyber is a cybersecurity company focused on strategy, assessments, and program build services.” Source: RevenueBase Database · checked Sep 14, 2026
8	Meijun	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	8 contacts →
	Indirect evidence “Meijun is a technology solutions provider that specializes in creating tailored, innovative technology solutions to help businesses achieve their objectives.” Source: RevenueBase Database · checked Sep 14, 2026
9	Dispatch Tech, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	6 contacts →
	Indirect evidence “At Dispatch Tech, we're dedicated to securing your digital world.” Source: RevenueBase Database · checked Sep 14, 2026
10	Skycubed	Indirect evidence	San Diego, United StatesHQ checked Sep 14, 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 Sep 14, 2026
11	Hannulawells	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 Sep 14, 2026
12	Aegis Innovators	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 Sep 14, 2026
13	Fylaxcyber INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
14	Nextwave Solutions, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect 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 14, 2026
15	Somerset Recon, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
16	Worksters	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Partial evidence “Worksters is a San Diego–based small business focused on cybersecurity, IT modernization, and encryption hardware.” Source: RevenueBase Database · checked Sep 14, 2026
17	Basic Business IT Consulting Services	Indirect evidence	San Diego, United StatesHQ checked Sep 14, 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 14, 2026
18	Dragonfly Cyber	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	2 contacts →
	Indirect evidence “We make cyber risk manageable by monitoring network traffic from the perimeter to the core, analyzing data in motion, visualizing risk and alerting to potential threats.” Source: RevenueBase Database · checked Sep 14, 2026
19	Prometheus Cybersecurity	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 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 14, 2026
20	Melurna	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	11-50	2 contacts →
	Indirect evidence “Melurna is an early-stage company revolutionizing how organizations manage cyber risk.” Source: RevenueBase Database · checked Sep 14, 2026
21	Taro Technology LLC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Providing IT / security and consulting services to medium sized business” Source: RevenueBase Database · checked Sep 14, 2026
22	Cyclic Security Solutions	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect 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 14, 2026
23	Cybersecurity Consulting Company	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Partial evidence “Atlant Security engineers the cybersecurity posture that enterprise procurement teams approve on sight.” Source: RevenueBase Database · checked Sep 14, 2026
24	Bitchip	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Partial evidence “Providing managed IT services with an emphasis on cybersecurity.” Source: RevenueBase Database · checked Sep 14, 2026
25	Retrofuture Innovations LLC	Partial evidence	San Diego, CA, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Partial evidence “Our firm specializes in Data Privacy, Cybersecurity & Network Consulting Services.” Source: RevenueBase Database · checked Sep 14, 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 startups. 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 startups.
Partial evidence: Its own public description names part of cybersecurity startups, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity startups. 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 63 cybersecurity startups based in San Diego, United States

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

As of Sep 14, 2026

27.2%Verified-email coverage

5.3Average contacts per company

1-10Median size (employees)

352.4%Largest-city concentration · New York

Sep 14, 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 63 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 startups, 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 startups”. 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 startups), 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 startups, 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, 90 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 14, 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 startups 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 cybersecurity startups, 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 cybersecurity startups are there based in San Diego, United States?

RevenueBase identified 63 cybersecurity startups 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?

Triden Group, headquartered in San Diego, tops this list with the largest team on record.

Which city has the most cybersecurity startups?

New York leads with 222 headquartered companies, followed by San Francisco (136) and Austin (129).

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 90 verified decision-maker contacts tracked across these 63 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 14, 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.