About

WhoTrainsAI is an independent, unranked directory of companies that sell AI training data, human feedback, RL environments and evaluations. No listing is paid for.

Method. Each profile is researched from primary sources (the vendor's site, official announcements, funding news). Every fact links to a source. Descriptions are written by us. A "checked" date shows when we last checked a profile; "needs-review" marks profiles we have not fully confirmed yet.

Leads. We find new companies through news, launches and public directories, then research each one ourselves.

Found an error? Corrections are welcome.