Company lists · Data verified August 2026

Top 25 AI training data companies based in the United States

Name: AI training data companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 73 companies tracked

There are 73 AI training data companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 3,837 professional contacts across them, including 439 with verified work emails and 256 with mobile numbers. San Francisco is the largest hub.

This list covers AI training data companies headquartered in the 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.

73Companies

3,837Contacts tracked

439Verified emails

256Mobile numbers

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The 25 largest AI training data companies based in the United States

Ranked by team size

Top 25 of 73 AI training data companies based in the 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	Thoth AI	San Mateo, CA	201-500	730	50
2	pareto.ai	Stanford, CA	51-200	527	81
3	Deccan AI	Mountain View, CA	51-200	380	50
4	SHAIP	New York, NY	201-500	315	10
5	Dataforce	New York, NY	51-200	311	21
6	Abaka AI	Palo Alto	51-200	212	7
7	Lifewood Data Technology LTD	Salt Lake City	1,001-5,000	206	21
8	Appen Butler Hill, INC	Kirkland, WA	51-200	125	1
9	Roboflow	Remote	51-200	107	74
10	Humansignal	San Francisco, CA	51-200	76	33
11	Globose Technology Solutions Private Limited	Wilmington, DE	51-200	71	3
12	Stepwise	Austin, TX	n/a	57	10
13	Rainscales	Houston, TX	11-50	54	3
14	Datologyai	Redwood City, CA	11-50	42	15
15	Data Labeler	Cherry Hill, NJ	11-50	39	1
16	maadaa.ai	Union City, CA	201-500	36	2
17	Lexdata Labs	Boston, MA	51-200	30	13
18	hub.xyz	San Francisco, CA	11-50	28	5
19	ANOTE	New York City, NY	11-50	28	2
20	Cambridge Bizserve	Peachtree Corners, GA	501-1,000	26	13
21	Reliabl	Sacramento, CA	1-10	16	2
22	curota.ai	Lewes, DE	11-50	13	5
23	Lexset	Seattle, WA	1-10	11	5
24	Refuel	San Francisco, CA	1-10	8	2
25	Soqono	New York, NY	11-50	6	1

Showing 25 of 73 AI training data companies based in the United States

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AI training data companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

San FranciscoLargest hub · 13 HQs

256Contacts with mobile numbers

3Emails 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

AI training data companies by metro

Metro	Companies
AI training data companies in San Francisco	13
AI training data companies in New York	6
AI training data companies in Palo Alto	5
AI training data companies in San Jose	4
AI training data companies in Austin	3
AI training data companies in Los Angeles	3
AI training data companies in Remote	2
AI training data companies in Dover	2

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 training data companies”, with match quality audited by blind human judging, and headquartered in the 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; 3 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 training data companies are there based in the United States?

There are 73 AI training data companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Thoth AI, headquartered in San Mateo, tops this list with the largest team on record.

Which city has the most AI training data companies?

San Francisco leads with 13 headquartered companies, followed by New York (6) and Palo Alto (5).

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 439 verified decision-maker contacts tracked across these 73 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.