Funding Brief｜Snorkel AI Raises $350M Series E, Valuation Nearly Triples, Selling the 'Data Factory' Behind Agent Training
Snorkel AI raised a $350M Series E co-led by Insight Partners and S32, nearly tripling its valuation from $1.3B (Series D) 17 months ago to $3.5B, with annualized recurring revenue growing 18x in 12 months to $375M. The signal here is that the training bottleneck for frontier models has shifted from 'do we have enough compute' to 'do we have refined enough training data and reinforcement learning environments' — and the data supply chain itself is becoming an infrastructure layer that can raise huge rounds on its own.