HedgeCo.Net — Snorkel AI announced on September 22, 2026 that it raised $350 million at a $3.5 billion valuation in a financing co-led by Insight Partners and S32, with significant participation from existing investor Addition, according to the company’s PR Newswire release and corroborating coverage from TechCrunch, Reuters, and SiliconANGLE. New investors named include March Capital, Blumberg Capital, Allegis Capital, Frontline, Standard, and Third Point Ventures, alongside existing Greylock, Lightspeed, GV, Factory, Prosperity7, Walden Catalyst, and Wells Fargo.
The San Francisco company, which grew out of the Stanford AI Lab, said proceeds will expand capacity in its agentic data factory supplying datasets, environments, and evaluation work for frontier and enterprise AI systems, and will deepen vertical and open-research investment. TechCrunch framed the round as roughly tripling the prior valuation amid demand for complex AI training data.
For VC allocators mapping the AI data stack, the hard marks are the $350 million ticket, $3.5 billion valuation, Insight/S32 co-lead structure, and the named participant roster. Revenue, ARR, or customer concentration figures were not disclosed in the primary announcement and should not be inferred.