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

Snorkel AI has raised a $350 million Series E at a $3.5 billion valuation, roughly tripling its previous valuation. The seven-year-old startup is betting that data preparation and labeling remain major bottlenecks for companies building and adapting AI systems, even as foundation models become more capable. The funding will support Snorkel's data-as-a-service approach, which helps organizations create and manage training datasets rather than relying entirely on manual labeling. For AI teams, the round is another signal that model performance increasingly depends on proprietary, domain-specific data and reliable evaluation pipelines, not just access to larger models. Snorkel has not disclosed new product pricing or availability details alongside the financing.