Directory tracks 174 AI training-data vendors as Anthropic's data costs jump $251M
rbhar90 · x · 2026-10-28
Who Sells Data launched a daily-updated directory of 174 AI training data and RL environment vendors (up from 159 at launch), with every fact sourced. This week: micro1's published payouts passed $2M, and Anthropic's S-1 shows data and eval vendor costs up $251M YoY in H1. New listings include cntxtai ($60M Series A, first-person robot work video), Design Arena (vote-based evals), MaxinsightsAI ($30M seed led by Peak XV), and Biostack ($9.5M for clinical data).
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