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Sylvian

Inactive

Specialized AI Agents.

Fall 2025Founded 20252 peopleSan Francisco, CA, USA

About

Sylvian helps companies build specialized AI agents.

Founders ยท 2

William Huang
William HuangFounder
Stanford

CEO @ Sylvian. IPhO Gold, Ex-Waymo, Citadel Securities, Stanford CS.

Niall Kehoe
Niall KehoeFounder
StanfordHarvard

CTO @ Sylvian. Ex-Stanford CS, Two Sigma, Harvard Medical School / Stanford research

Launch

Launched on Y Combinator ยท Nov 2025
View launch post โ†—

Sylvian incentivizes high quality expert data for LLMs through Competition

Sylvian hosts competitions to collect expert data for LLMs, starting with tool-use data (e.g., Excel, VSCode). It crowdsources 4,500+ experts to produce high-quality data at scale, marketing the thrill of leaderboard positions and competition prestige as the core value for data collection.

B2BReinforcement LearningB2BAI

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