Snorkel AI

About Snorkel AI

Financials

Dated, source-cited figures. Estimates are marked.

Products by Snorkel AI

All products by Snorkel AI reviewed by our AI panel of experts.

Snorkel AIAI Data Tools

Programmatic data labeling and model development platform for AI teams

Free7.8/10

How Our Review Panel Scores Snorkel AI

Six independent reviewer personalities assessed Snorkel AI's product on their own terms. They landed within 0.6 points of each other, an unusually strong consensus.

Averaged across 1 reviewed product in our catalog. Scores are out of 10.

Competitive Landscape

Who Snorkel AI competes with, and how they differ.

Scale AI7.6/10

Scale is the larger, more diversified data-labeling incumbent for frontier labs and government; after Meta took a ~49% stake and hired away CEO Alexandr Wang in mid-2025, Scale leaned further into large-lab RLHF contracts and cut 14% of staff, while Snorkel stays independent with a smaller, enterprise-focused programmatic-labeling and evaluation platform.

1 product reviewed on TopReviewed

S

Surge AI

Surge AI is a pure human-data and RLHF shop serving OpenAI, Anthropic, Google, and Meta directly, with no self-serve labeling software product — it competes with Snorkel's newer "expert data-as-a-service" line rather than Snorkel's core programmatic-labeling tooling.

Labelbox7.9/10

Labelbox is a workflow-based annotation platform built around human-in-the-loop labeling (image, video, text, document) plus active learning, whereas Snorkel differentiates on programmatic labeling functions and weak supervision that reduce manual annotation volume.

1 product reviewed on TopReviewed

Company Timeline

Key milestones in Snorkel AI's history, with sources.

1. Sep 17, 2025Milestone

   Lays off 13% of workforce in pivot to data-as-a-service

   Snorkel AI cut 31 of its 240 employees, hitting the software engineering team hardest while sparing most AI-focused roles, as it shifted toward a data-as-a-service business and deprioritized legacy areas.

   businessinsider.com
2. Aug 6, 2025Partnership

   Accenture Ventures makes strategic investment

   Accenture made a strategic investment through Accenture Ventures to help enterprises, particularly in financial services, curate high-quality datasets for training and evaluating AI models with Snorkel.

   newsroom.accenture.com
3. May 29, 2025Funding

   Series D — $100M at $1.3B valuation

   Snorkel AI raised a $100 million Series D led by Addition, with Prosperity 7 Ventures, Greylock, Lightspeed, BNY, and QBE Ventures participating, valuing the company at $1.3 billion — a 30% step-up from 2021.

   businesswire.com
4. Aug 9, 2021Funding

   Series C — $85M at $1B valuation

   Snorkel AI raised an $85 million Series C led by BlackRock and Addition, reaching unicorn status at a $1 billion valuation.

   snorkel.ai
5. Apr 7, 2021Funding

   Series B — $35M led by Lightspeed

   Snorkel AI raised a $35 million Series B led by Lightspeed Venture Partners, with Greylock, GV, In-Q-Tel, Nepenthe Capital, Walden, and BlackRock participating; total funding reached $50M. The round also introduced Application Studio.

   techcrunch.com
6. Jul 14, 2020Launch

   Emerges from stealth with Snorkel Flow

   Snorkel AI publicly launched its programmatic data-labeling platform, having raised $15M to date across seed and Series A.

   snorkel.ai
7. October 2019Funding

   Series A — $12M

   Snorkel AI raised a $12 million Series A, bringing early funding to $15M.

   forbes.com
8. June 2019Funding

   Seed round — $3M

   Snorkel AI closed a $3 million seed round.

   forbes.com
9. 2019Founded

   Founded as a Stanford AI Lab spinout

   Snorkel AI was founded by Alex Ratner, Christopher Ré, Braden Hancock, Henry Ehrenberg, and Paroma Varma, commercializing four years of weak-supervision research at the Stanford AI Lab.

   hai.stanford.edu