Company lists · Data verified August 2026

Top 25 AI platforms and tools based in San Francisco, United States

Name: AI platforms and tools 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 156 companies tracked

There are 156 AI platforms and tools headquartered in San Francisco, United States (RevenueBase, August 2026). RevenueBase tracks 13,733 professional contacts across them, including 3,490 with verified work emails and 2,184 with mobile numbers. San Francisco is the largest hub.

This list covers AI platforms and tools 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.

156Companies

13,733Contacts tracked

3,490Verified emails

2,184Mobile numbers

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The 25 largest AI platforms and tools based in San Francisco, United States

Ranked by team size

Top 25 of 156 AI platforms and tools 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	Turing	San Francisco, CA	1,001-5,000	5,900	1,102
2	Writer	San Francisco, CA	n/a	1,564	391
3	Airtable	San Francisco, CA	501-1,000	928	484
4	Anyscale	San Francisco, CA	201-500	768	141
5	AI R Everymind	San Francisco, CA	501-1,000	485	103
6	Tools For Humanity	San Francisco	51-200	393	199
7	Weights & Biases	San Francisco, CA	201-500	342	76
8	Together AI	San Francisco, CA	201-500	292	192
9	Baseten	San Francisco, CA	201-500	173	111
10	Arize AI	San Francisco, CA	51-200	157	108
11	Fluidstack	San Francisco, CA	51-200	141	104
12	MERGE	San Francisco, CA	51-200	126	83
13	Voltage Park	San Francisco, CA	51-200	91	71
14	Runpod	San Francisco, CA	51-200	81	43
15	Stackai	San Francisco, CA	51-200	67	37
16	R&d Center Winstars.ai	San Francisco, CA	51-200	42	10
17	Langdock	San Francisco	51-200	35	22
18	Maxim AI	San Francisco, CA	11-50	33	16
19	Prime Intellect	San Francisco	11-50	32	17
20	Essential AI	San Francisco	11-50	28	16
21	Wiro AI	San Francisco, CA	11-50	26	8
22	Tazi AI Systems	San Francisco, CA	11-50	24	10
23	Outerbounds Acq. By Anaconda	San Francisco, CA	11-50	23	4
24	Runloop AI	San Francisco, CA	11-50	17	11
25	Langfuse	San Francisco	11-50	16	12

Showing 25 of 156 AI platforms and tools based in San Francisco, United States

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AI platforms and tools based in San Francisco, United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

San FranciscoLargest hub · 156 HQs

2,184Contacts with mobile numbers

23Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

AI platforms and tools by metro in the United States

Metro	Companies
AI platforms and tools in San Francisco	156
AI platforms and tools in New York	79
AI platforms and tools in Austin	38
AI platforms and tools in Chicago	33
AI platforms and tools in Palo Alto	27
AI platforms and tools in Miami	23
AI platforms and tools in Los Angeles	22

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 “AI platforms and tools”, 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; 23 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 AI platforms and tools are there based in San Francisco, United States?

There are 156 AI platforms and tools headquartered in San Francisco, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most AI platforms and tools?

San Francisco leads with 156 headquartered companies, followed by New York (79) and Austin (38).

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 3,490 verified decision-maker contacts tracked across these 156 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.