Company lists · Data verified August 2026

Top 25 Cybersecurity companies based in San Francisco, United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 179 companies tracked

Our directory lists 179 cybersecurity companies based in San Francisco, United States, with 7,741 professional contacts and 2,663 email addresses. The list was last updated in August 2026, and New York is the single most-represented city among the companies listed.

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 August 28, 2026.

179Companies

7,741Contacts tracked

2,663Verified emails

1,606Mobile numbers

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

Ranked by team size

Top 25 of 179 cybersecurity companies based in San Francisco, United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Bugcrowd	San Francisco, CA	n/a	3,566	238
2	ARMIS	San Francisco, CA	501-1,000	1,085	799
3	Coalition, INC	San Francisco, CA	501-1,000	719	562
4	At-Bay	San Francisco, CA	201-500	349	192
5	Vehere	San Francisco, CA	201-500	210	138
6	TAC Security	San Francisco, CA	51-200	207	46
7	Skybox Security	San Francisco, CA	201-500	133	68
8	Cybercube	San Francisco, CA	51-200	123	75
9	Material Security	San Francisco, CA	51-200	87	52
10	Jones IT	San Francisco, CA	51-200	83	44
11	Socket	San Francisco	51-200	79	54
12	EXEIN	San Francisco, CA	51-200	66	31
13	Bastille	San Francisco, CA	51-200	66	14
14	Pradeo	San Francisco, CA	51-200	47	33
15	Escape	San Francisco, CA	11-50	43	23
16	Nightdragon	San Francisco, CA	11-50	41	13
17	akto.io	San Francisco, CA	11-50	32	16
18	Upfort	San Francisco, CA	11-50	31	19
19	Symmetry Systems	San Francisco, CA	11-50	27	17
20	Strongestlayer	San Francisco, CA	51-200	27	2
21	Seworks	San Francisco, CA	11-50	26	1
22	Sentant	San Francisco, CA	11-50	24	9
23	Centarus	San Francisco, CA	11-50	23	17
24	Atomus	San Francisco, CA	11-50	23	15
25	Codeant AI	San Francisco, CA	11-50	22	13

Showing 25 of 179 cybersecurity companies based in San Francisco, United States

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

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 329 HQs

1,606Contacts with mobile numbers

14Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

Cybersecurity companies by metro in the United States

Metro	Companies
Cybersecurity companies in New York	329
Cybersecurity companies in Austin	182
Cybersecurity companies in San Francisco	179
Cybersecurity companies in Washington	168
Cybersecurity companies in Atlanta	158
Cybersecurity companies in Houston	153
Cybersecurity companies in Miami	149

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity companies”, with match quality audited by blind human judging, and headquartered in San Francisco, United States.
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: Contact records re-verify on a rolling cadence; 14 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity companies are in the directory?

The directory lists 179 cybersecurity companies based in San Francisco, United States.

Which city has the most cybersecurity companies?

New York is the single most-represented city among the cybersecurity companies on the list.

How many contacts are available for cybersecurity companies?

The directory includes 7,741 professional contacts and 2,663 email addresses for the listed cybersecurity companies.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.