Snorkel AI Raises $350M to Scale the Data Factory for Frontier AI
$350M. Snorkel AI just raised at a $3.5B valuation to scale data production for frontier models.

Why it matters
Data infrastructure for AI training is becoming a standalone capital asset. Snorkel's Series D signals investor conviction that programmatic data generation—not chips, not models, but the data pipeline itself—is now a bottleneck worth $3.5B to solve.
The key facts
5 to know$350M Series D funding round
$3.5B post-money valuation
Co-led by Insight Partners and S32
Participants: Addition (existing), March Capital, Blumberg Capital, Allegis Capital, Frontline, Standard, Third Point Ventures
Data generation/labeling for frontier model training is the strategic focus
The story so far
Earlier coverage of this storyline
- Training data provider Snorkel AI raises $350M at $3.5B valuationSiliconAngle
- This story
Go to the source
EnterpriseAIhpcwire.com
Publisher excerpt: SAN FRANCISCO, Sept. 23, 2026 — Snorkel AI has announced it raised $350 million at a valuation of $3.5B in a round co-led by Insight Partners and S32, with significant participation from existing investor Addition. The round included new investors March Capital, Blumberg Capital, Allegis Capital,…