Snorkel AI Raises $350 Million in Series E Funding

Snorkel AI, a San Francisco-based company specializing in building specialized training data and evaluation environments for advanced AI models, has announced the successful completion of its Series E funding round, raising $350 million. The round was led by Insight Partners and S32, with participation from a host of new and existing investors, including March Capital, Blumberg Capital, Allegis Capital, Frontline, Standard, Third Point Ventures, Greylock, Lightspeed, GV, Factory, Prosperity7, Walden Catalyst, and Wells Fargo.

Company Overview

Snorkel AI, founded by researchers from Stanford's AI lab, initially focused on software to help companies create and manage training datasets. Over time, the company shifted its focus to providing ready-to-use datasets and reinforcement-learning environments, catering to the growing demands of AI labs looking to tackle complex tasks.

Co-founder and CEO, Alexander Ratner, emphasized the company's mission, saying, "The teams pushing the frontier want a research data partner who pioneers the science of data development. That's what Snorkel was built to be."

Funding Utilization

The newly acquired funds are earmarked for expanding Snorkel AI's agentic data factory. This facility is crucial for supplying the specialized datasets and environments required by advanced AI labs. The company aims to enhance its capabilities to meet the increasing demand for high-quality training data in high-stakes AI applications.

Financial Growth

This funding round comes on the heels of a significant financial milestone for Snorkel AI. The company's annualized revenue run-rate has surged from approximately $20 million to over $350 million in just a year, driven largely by its data-as-a-service business launched in September 2025.

Leadership Team

The company is led by a team of experienced professionals, including Alexander Ratner (Co-founder and CEO), Andrew Olenick (Founder & AI System Strategist), Henry Kiss Ehrenberg (Co-Founder), and Paroma Varma (Co-Founder).

Conclusion

Snorkel AI's latest funding round positions it strongly to continue its growth trajectory, enhancing its data services to meet the evolving needs of AI labs worldwide. With the backing of prominent investors and a proven track record of revenue growth, Snorkel AI is well-equipped to support the next generation of AI advancements.