Company lists · Data verified August 2026

Top 15 Api security companies based in San Francisco, United States

Name: Api security 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 32 companies tracked

There are 32 api security companies headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 3,904 professional contacts across them, including 364 with verified work emails and 304 with mobile numbers. New York is the largest hub.

This list covers api security 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.

32Companies

3,904Contacts tracked

364Verified emails

304Mobile numbers

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The 15 largest api security companies based in San Francisco, United States

Ranked by team size

Top 15 of 32 api security 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	Traceable By Harness	San Francisco, CA	201-500	77	52
3	Apisec	San Francisco, CA	11-50	52	16
4	Escape	San Francisco, CA	11-50	43	23
5	Seworks	San Francisco, CA	11-50	26	1
6	Operant AI	San Francisco, CA	11-50	16	10
7	Humanize, INC	San Francisco, CA	11-50	6	4
8	Xcape, INC	San Francisco, CA	11-50	6	3
9	Cyberelite	San Francisco, CA	11-50	6	2
10	Harmony Intelligence	San Francisco	1-10	5	5
11	Secure Overcast	San Francisco, CA	1-10	4	3
12	METLO	San Francisco, CA	1-10	3	2
13	Socialproof Security	San Francisco, CA	1-10	2	2
14	Cobaltix Compliance	San Francisco, CA	1-10	2	1
15	Securityinfinity	San Francisco, CA	1-10	1	1

Showing 15 of 32 api security companies based in San Francisco, United States

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

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 40 HQs

304Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Api security companies by metro in the United States

Metro	Companies
Api security companies in New York	40
Api security companies in San Francisco	32
Api security companies in Austin	31
Api security companies in Dallas	28
Api security companies in Miami	26
Api security companies in Houston	26
Api security companies in Chicago	25

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 “api security 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 api security companies are there based in San Francisco, United States?

There are 32 api security companies headquartered in San Francisco, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most api security companies?

New York leads with 40 headquartered companies, followed by San Francisco (32) and Austin (31).

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 364 verified decision-maker contacts tracked across these 32 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.

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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.