Snorkel AI
formerly SnorkelThe data layer for specialized AI.
Redwood City, United States · Founded 2019 · $240.0M raised
- Headquarters
- Redwood City, California
- Employees
- 51–200
- Founded
- 2019
- Business Model
- B2B
- Website
- snorkel.ai
- Total Funding
- $240.0M
- Last Round
- $100.0M Series DMay 2025
- Rounds
- 5
About
Snorkel AI is building the data layer for specialized AI, enabling frontier labs, enterprises, and government agencies to develop high-quality AI systems at scale. Spun out of the Stanford AI Lab in 2019, Snorkel pioneered programmatic data labeling — replacing slow, expensive hand-labeling with automated labeling functions and expert-in-the-loop workflows. The Snorkel Flow platform lets AI teams build, evaluate, and deploy intelligent systems by combining programmatic automation with calibrated expert input. Customers include Google, Anthropic, AWS, and Microsoft. Snorkel AI is valued at $1.3B and raised a Series D in August 2025. After a 13% workforce reduction in September 2025, the company refocused on its core AI data and expert network business.
Summary
Snorkel AI is an Artificial Intelligence company based in Redwood City, United States, founded in 2019. It has raised $240.0M in total across 5 rounds, most recently a $100.0M Series D round in May 2025. Investors include Greylock Partners, Addition and Accenture Ventures.
Tech & App Stack
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Funding History
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May 2025
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Seed through Series D — per-round amounts, valuations, and who invested in each round.
Investors
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