Snorkel AI raised $350 million in a Series E funding round. The investment brings the company’s valuation to $3.5 billion. Insight Partners and Section 32 (S32) co-led the financing.
The new valuation nearly triples the $1.3 billion mark from May 2025. Existing investors Addition, Greylock, and Wells Fargo also participated.
Surging demand for high-quality training data required by advanced AI labs drove the increase. Stanford AI lab researchers founded the company to vet data using human experts and AI agents.
Snorkel AI reported an annualized revenue run-rate exceeding $350 million. The company’s data-as-a-service offering fueled the recent revenue growth.