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§ Private Profile · Redwood City, CA, USA
Snorkel AI is a technology company.
Snorkel AI provides an AI data development platform, a unified engine for designing, testing, and improving data for frontier AI models. It operationalizes the full AI data loop, from dataset curation and simulations to rubric design and evaluations. This programmatic approach blends automation with expert human oversight, generating high-quality, domain-specific datasets.
Founded by Stanford AI Lab alums, the company emerged from research into programmatic labeling and weak supervision. Their insight identified the bottleneck of insufficient labeled training data in AI. This prompted pioneering systematic data development, enabling enterprises to build specialized AI models efficiently with proprietary data.
Snorkel AI's platform serves leading enterprises and AI teams across diverse industries, addressing implementation challenges. Its mission is to transform AI data development into a programmatic discipline, akin to software engineering. This fosters capable, performant AI systems, unlocking advanced applications in real-world environments.
Snorkel AI has raised $235.0M across 5 funding rounds.
Snorkel AI has raised $235.0M in total across 5 funding rounds.
Snorkel AI has raised $235.0M across 5 funding rounds. Most recently, it raised $100.0M Series D in May 2025.
Snorkel AI has raised $235.0M in total across 5 funding rounds.
Snorkel AI's investors include Addition, 01 Advisors, Abstract Ventures, Accel, Andreessen Horowitz, B8, Bessemer Venture Partners, Blossom Capital, Felicis Ventures, ff Venture Capital, General Catalyst, Greylock.
Snorkel AI is a Stanford spin-out developing the Snorkel AI Data Development Platform, which enables enterprises to programmatically create high-quality training data for specialized AI models, bypassing manual labeling bottlenecks.[1][2][3] It serves Fortune 500 companies (e.g., BNY, Wayfair, Chubb), government agencies (e.g., U.S. Air Force), and AI leaders (e.g., Anthropic, Google, Apple) by solving the core problem of turning proprietary expert knowledge and siloed data into production-ready AI systems, particularly for agentic AI in regulated sectors like finance, healthcare, and defense.[2][4][5][8] Key products include Snorkel Flow for end-to-end data labeling and model development, Snorkel Evaluate for scalable AI evaluation, and Snorkel Expert Data-as-a-Service for curated datasets, driving 10-100x faster development and 99% model accuracy.[1][4][6][7]
The company has shown strong growth, raising a $100M Series D in 2025, securing partnerships like Accenture for financial services, and expanding into public sector missions, with 170+ peer-reviewed publications underpinning its tech.[2][4][5]
Snorkel AI emerged from the Stanford AI Lab, where founders Alex Ratner (CEO), Paroma Varma, Braden Hancock, and Henry Ehrenberg spent over five years researching programmatic data labeling, weak supervision, and techniques to address AI's training data shortage.[2][3] Ratner, a University of Washington assistant professor, led the effort after core system development, launching the company out of stealth in July 2020 with $15M from investors like Greylock.[3]
The idea stemmed from recognizing that manual labeling scaled poorly for enterprise AI; instead, they pioneered capturing domain expertise via rules, heuristics, and legacy systems to generate labels programmatically.[2][6] Early traction included pilots with Google, Apple, DARPA, and Stanford Medicine, evolving into Snorkel Flow as the flagship product and deployments across sectors.[2][3][6]
Snorkel AI rides the agentic AI wave, where generalist LLMs fall short for enterprise needs, emphasizing specialized, domain-specific models powered by proprietary data amid surging demand for reliable production AI.[1][4][5] Timing aligns with 2025's momentum in regulated industries—finance, healthcare, defense—where data quality and compliance trump raw scale, amplified by partnerships like Accenture and U.S. government contracts.[5][8]
Market forces favor its data-centric approach: exploding AI data needs (e.g., for reasoning, tool use) outpace manual methods, while Snorkel influences the ecosystem via datasets, benchmarks, and open research that refine real-world AI performance for partners like Anthropic.[2][4][7] It democratizes specialized AI, bridging data scientists, experts, and stakeholders.
Snorkel AI is positioned to dominate enterprise AI data infrastructure, with its Series D fueling expansion into financial services, public sector, and agentic systems via co-developed solutions and Expert Data services.[4][5][7] Trends like multimodal data demands and stricter AI regulations will amplify its edge, potentially evolving it into the de facto platform for "human blueprint" AI—scaling expert knowledge at 100x speed.[1][3]
As agentic AI matures, expect deeper integrations with LLMs and vertical plays (e.g., pharma, insurance), solidifying Snorkel as the enabler turning enterprise data into defensible AI moats—echoing its mission to make AI data development as programmatic as software itself.[2]