Snorkel AI triples its valuation to $3.5bn selling training data

Snorkel AI announced a $350 million Series E on Monday at a $3.5 billion valuation, led by Insight Partners and S32, with Alphabet's GV fund among more than half a dozen other backers. The company was valued at $1.3 billion at its Series D seventeen months earlier.

The company sells what the labs increasingly cannot make enough of themselves: completed datasets and reinforcement-learning environments, built by pairing synthetic generation with subject-matter experts, and delivered as a service rather than as tooling.

Chief executive Alex Ratner wrote in a blog post that the data-as-a-service line has “grown over 18 times” since launching roughly a year ago and that the company “this week crossed an annualized revenue run rate of $375 million.” That figure is the company's own and has not been independently verified; the raise and the valuation are reported by two outlets and by the company.

• Confirmed $350m Series E at a $3.5bn valuation, led by Insight Partners and S32, announced 22 September 2026; prior Series D valued the company at $1.3bn seventeen months earlier. TechCrunch
• Claimed Annualized revenue run rate of $375m and 18x growth since the data-as-a-service launch — stated by chief executive Alex Ratner in a company blog post, not independently verified. Alex Ratner, Snorkel AI, via SiliconANGLE