Snorkel AI raises $350M at $3.2B on demand for specialized training data

Snorkel AI raised a $350M Series E co-led by Insight Partners and S32, with Greylock participating, at a $3.2B valuation. The company sells expert-labeled, domain-specific data and evaluation to frontier labs and enterprises, and reports 17x revenue growth as post-training data becomes the scarce input.