Snorkel AI Raises $350M Series E at $3.5B Valuation
The AI data platform will expand its agentic data factory serving advanced AI lab systems with backing from Insight Partners and S32.
Snorkel AI secures major funding round
Snorkel AI closed a $350 million Series E financing round on September 22, 2026, at a $3.5 billion valuation, according to Wilson Sonsini Goodrich & Rosati, which advised the company on the transaction. The company describes itself as a frontier AI data lab.
Insight Partners and S32 co-led the round, with significant participation from existing investor Addition. The financing attracted a broad mix of new backers including March Capital, Blumberg Capital, Allegis Capital, Frontline, Standard, and Third Point Ventures. Returning investors Greylock, Lightspeed, GV, Factory, Prosperity7, Walden Catalyst, and Wells Fargo also participated.
What Snorkel AI does
Snorkel AI operates what it calls an "agentic data factory" that supplies data and environments for advanced AI lab systems. The company positions itself at the infrastructure layer of AI development, focusing on the data preparation and management challenges that underpin frontier model training and deployment.
The fresh capital will be directed toward expanding this data factory capability, though specific product roadmap details were not disclosed in the announcement.
Why it matters
This valuation milestone reflects sustained investor confidence in AI infrastructure companies, particularly those addressing data quality and preparation—often cited as bottlenecks in enterprise AI adoption. The broad syndicate spanning growth equity firms and corporate venture arms suggests institutional conviction that data tooling remains a strategic chokepoint as organizations scale AI deployments. The round's size also indicates Snorkel AI has likely demonstrated meaningful traction with customers building or operating large language models and other advanced AI systems.
Legal team and transaction details
A Wilson Sonsini corporate team led by partners Rezwan Pavri and Bryan King advised Snorkel AI throughout the financing process. The broader advisory group included Karin Hjorth, Jason Choi, John Bergeson, Samantha Pelto, and Matthew Cook.
Wilson Sonsini Goodrich & Rosati first reported the transaction details. Additional coverage appeared in Reuters and TechCrunch, and Snorkel AI published its own announcement on the company blog.
This is an original analysis by the Omega editorial team. Source reporting: AI Watch.
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