Company lists · Data refreshed November 2026

Top 25 Cybersecurity startups based in San Francisco, United States

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

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 141 companies tracked

RevenueBase identified 141 company matches for cybersecurity startups associated with San Francisco, United States as of November 2026 and tracks 6,941 professional contacts across them, including 1,990 with verified work emails. Across the United States, New York is the largest hub for this category (292 companies); San Francisco has 141.

This list covers company matches for cybersecurity startups associated with San Francisco, 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 November 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built

141Companies

6,941Contacts tracked

1,990Verified emails

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

Ranked by team size

Top 25 of 141 company matches for cybersecurity startups based in San Francisco, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	Bugcrowd	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	n/a	3,342 contacts →
	Exact match “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Coalition, INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	718 contacts →
	Exact match “Coalition is the world's first Active Insurance provider designed to help prevent digital risk before it strikes.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3	horizon3.ai	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	569 contacts →
	Exact match “Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up?” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4	Securitypal AI	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	201-500	273 contacts →
	Exact match “SecurityPal is a Cybersecurity Assurance Management Platform that blends AI-powered automation with expert oversight to help organizations accelerate trust, reduce friction, and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	TAC Security	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	51-200	245 contacts →
	Exact match “TAC Security (NSE: TAC) TAC Security, a leading publicly listed global cybersecurity company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Vehere	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	201-500	173 contacts →
	Exact match “Vehere is an AI cyber defense company operating at the intersection of national security and enterprise security.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7	Socket	Exact match	San Francisco, United StatesHQ recorded Nov 5, 2026	51-200	131 contacts →
	Exact match “Socket is a cybersecurity platform that protects companies from software supply chain attacks.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Jones IT	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	51-200	92 contacts →
	Exact match “At Jones IT, we believe IT should make your life easier- not more complicated.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9	Cloudmark	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	51-200	49 contacts →
	Exact match “Cloudmark was acquired by Proofpoint.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Nightdragon	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	48 contacts →
	Exact match “NightDragon is an investment and advisory firm focused on investing in growth and late-stage companies within the cybersecurity, safety, security, and privacy industry.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Upfort	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	29 contacts →
	Exact match “Upfort is a leading platform for cyber security and insurance that provides holistic protection from evolving cyber threats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12	Blackfog	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	27 contacts →
	Exact match “BlackFog is a global leader in AI-based cybersecurity and the pioneer of anti data exfiltration (ADX) technology.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Sentant	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	26 contacts →
	Exact match “Sentant is a next-generation cybersecurity & IT services firm with a team of experienced technology professionals.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	Code RED Partners	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	1-10	24 contacts →
	Exact match “Code Red specializes in cyber security staffing.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Seworks	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	23 contacts →
	Exact match “We specialize in Web Application and API penetration Testing, Cyber Threat Intelligence, and Detecting Account Takeovers (ATOs) from attackers.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Shield Capital	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	1-10	21 contacts →
	Exact match “Shield Capital is a team of veteran investors, founders and national security leaders who are helping founders build frontier solutions in cybersecurity, artificial intelligence…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Symmetry Systems	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	20 contacts →
	Exact match “Symmetry is the Data+AI Security Company.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	Ysecurity	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	19 contacts →
	Exact match “We are a team of cybersecurity operators from Silicon Valley.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Operant AI	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	19 contacts →
	Exact match “Operant AI is an industry-defining cybersecurity leader at the forefront of securing AI & MCP.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Actifile	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	18 contacts →
	Exact match “Actifile helps organizations automate their Data Discovery, Monitoring and Protection needs, addressing external data threats (like ransomware), insider threats (like shadow IT)…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	Epiccyber	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	11-50	16 contacts →
	Exact match “EpicCyber: Empowering Your Business with Zscaler, Crowd strike, and Okta Cybersecurity Solutions” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Black CAT Security	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	1-10	10 contacts →
	Exact match “At Blackcat Security we think like Black Hats but work like White Hats.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Metabase Q	Exact match	San Francisco, United StatesHQ recorded Nov 5, 2026	51-200	9 contacts →
	Exact match “Metabase Q offers an end-to-end platform that enables businesses to manage, measure and mature their cybersecurity.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Epic Machines, INC	Exact match	San Francisco, United StatesHQ recorded Nov 5, 2026	11-50	9 contacts →
	Exact match “Epic Machines is a Value Added Reseller and Managed Security Services provider offering Security Transformation using Cloud-native solutions to commercial and government markets.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	909cyber	Exact match	San Francisco, CA, United StatesHQ recorded Nov 5, 2026	1-10	9 contacts →
	Exact match “Fraud doesn’t break in.” Recorded in the RevenueBase company graph · Nov 5, 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 startups”. 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 141 cybersecurity startups based in San Francisco, United States

See the full list, filter by size, metro and specialty, and access 1,990 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Nov 5, 2026

28.7%Verified-email coverage

49.2Average contacts per company

11-50Median size (employees)

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 141 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 Francisco, United States whose business descriptions match “cybersecurity startups” 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 1,990 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 November 5, 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 startups 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 startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity startups are there based in San Francisco, United States?

RevenueBase identified 141 company matches for cybersecurity startups associated with San Francisco, United States as of November 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?

Bugcrowd 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 startups?

New York leads the United States with 292 company records, followed by Austin (147) and San Francisco (141).

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 1,990 professional contacts with verified work emails tracked across these 141 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 November 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.