Snorkel AI secures $350M Series E, valuation soars to $3.5B
Snorkel AI has raised $350 million in a Series E round led by Insight Partners and S32, valuing the company at $3.5 billion. The startup, which supplies AI labs with training data and reinforcement learning environments, says its annualized revenue run-rate has grown to $375 million, an 18-fold increase in a year. The company shifted to a data-as-a-service model last year, combining synthetic data generation with human expert input.
The Series E round marks a dramatic escalation for the company, which was valued at $1.3 billion just 17 months prior. This new valuation of $3.5 billion reflects a strategic pivot from selling software tools to offering a fully managed data-as-a-service model, blending automated synthetic data generation with input from human specialists. The company’s reported annualized revenue run-rate of $375 million represents an 18-fold increase year-over-year.
This explosive growth places Snorkel within a broader surge of AI data providers, including competitors like Mercor and Handshake, which have reported gross revenues in the billions. Unlike those rivals, Snorkel’s revenue figures are net of the costs paid to its expert network, as those expenses are classified under cost of goods sold. The company was founded in 2019, stemming from research conducted at a Stanford AI lab.
This funding round could signal a major shift in how the AI industry is powered, moving the competitive battleground from model architecture to the data itself. As AI labs scale, their dependence on specialized data providers may grow, potentially concentrating significant influence over AI development in a few key vendors. This could affect the cost and accessibility of advanced AI, and may also reshape the labor market for domain experts, who are becoming integral to the AI supply chain.