Company lists · Data verified August 2026

Top 18 Application security testing companies based in San Francisco, United States

Name: Application security testing 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 34 companies tracked

There are 34 application security testing companies headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 947 professional contacts across them, including 229 with verified work emails and 269 with mobile numbers. New York is the largest hub.

This list covers application security testing companies headquartered in San Francisco, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

34Companies

947Contacts tracked

229Verified emails

269Mobile numbers

Unlock all 34 companies Free account · no credit card · 2 minutes

The 18 largest application security testing companies based in San Francisco, United States

Ranked by team size

Top 18 of 34 application security testing 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	Cobalt	San Francisco, CA	201-500	345	122
2	Apisec	San Francisco, CA	11-50	52	16
3	Projectdiscovery	San Francisco, CA	11-50	45	26
4	Escape	San Francisco, CA	11-50	43	23
5	Seworks	San Francisco, CA	11-50	26	1
6	Primeqa Solutions	San Francisco, CA	51-200	23	8
7	Deepstrike	San Francisco, CA	11-50	17	2
8	Coverity	San Francisco, CA	201-500	15	1
9	Hubbase	San Francisco, CA	11-50	7	5
10	Humanize, INC	San Francisco, CA	11-50	6	4
11	Xcape, INC	San Francisco, CA	11-50	6	3
12	Mobileboost	San Francisco	1-10	6	3
13	Harmony Intelligence	San Francisco	1-10	5	5
14	Probely A Snyk Business	San Francisco, CA	11-50	4	3
15	Secure Overcast	San Francisco, CA	1-10	4	3
16	Socialproof Security	San Francisco, CA	1-10	2	2
17	Cobaltix Compliance	San Francisco, CA	1-10	2	1
18	Osmosis Security, LLC	San Francisco, CA	1-10	1	1

Showing 18 of 34 application security testing companies based in San Francisco, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 229 reachable decision-makers.

Free account · no credit card

See all 34 companies

Application security testing companies based in San Francisco, United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 41 HQs

269Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Application security testing companies by metro in the United States

Metro	Companies
Application security testing companies in New York	41
Application security testing companies in San Francisco	34
Application security testing companies in Austin	26
Application security testing companies in Denver	18
Application security testing companies in Dallas	15
Application security testing companies in Chicago	15
Application security testing companies in Los Angeles	14

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 “application security testing 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; 0 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 application security testing companies are there based in San Francisco, United States?

There are 34 application security testing companies headquartered in San Francisco, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Cobalt, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most application security testing companies?

New York leads with 41 headquartered companies, followed by San Francisco (34) and Austin (26).

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 229 verified decision-maker contacts tracked across these 34 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 34 application security testing companies based in San Francisco, United States. Start with a free account, no credit card.

Get the full list

Related lists

Application security testing companies by geography

Browse the directory

Browse: Companies home · Application security testing companies in United States · All United States lists · All Application security testing companies lists · New lists

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.