Snorkel AI triples valuation to $3.5B as demand for AI training data booms

Snorkel AI raised $350 million in a Series E, pushing its valuation to $3.5 billion, nearly triple the $1.3 billion it achieved 17 months earlier. The company now reports an annualized revenue run-rate of $375 million, an 18-fold increase, driven by AI labs’ demand for high-quality training data. Snorkel’s model blends software-generated synthetic data with subject-matter experts, positioning it as a data-as-a-service provider rather than a pure human-labor marketplace.