Snorkel AI raises $350M Series E at $3.5B valuation, passes $375M ARR
ajratner · x · 2026-09-22
Snorkel AI founder ajratner announced a $350M Series E at a $3.5B valuation, led by Insight Partners and S32, with Addition, Lightspeed, Greylock, GV returning and Third Point, Blumberg Capital and others joining.
- Growth of 18x+ in the last 12 months since launching its Data-as-a-Service offering, passing $375M ARR this week
- Thesis: as AI reaches superhuman capabilities, basic staffing and crowdsourcing approaches to data work are no longer enough; progress requires combining human expertise with specialized AI
- Snorkel positions itself as a frontier data lab building an "RSI data engine" for the next phase
The company started as a Stanford research project known for weak-supervision labeling and has pivoted into a frontier AI data provider.
Related event: Snorkel AI Raises $350M Series E at $3.5B Valuation(15 posts)→
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