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Sylvian
DefunctYC F25San Francisco, US · Founded 2025 · 2 employees · 3 known investors
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Sylvian provides tools for organizations to create AI agents tailored to specific business tasks and workflows.
AI & Machine LearningEnterprise SoftwareReinforcement LearningB2BAIUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (F25)
Sylvian was founded in 2025 by William Huang and Niall Kehoe.
WH
William HuangFounder2025–2026William Huang studied computer science at Stanford and previously worked at Waymo and Citadel Securities. He is currently CEO of Sylvian.
NK
Niall KehoeFounderuntil 2026Niall Kehoe is a computer science graduate from Stanford who previously worked at Two Sigma and conducted research at Harvard Medical School and Stanford. He is currently CTO of Sylvian.
Investors · 3
Y Combinatorlisted by Y CombinatorSan Francisco · $500K
How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us
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Amino CapitalreportedPalo Alto · $100K – $10M
How we know: Y Combinator's founder network · Not right? Tell us
Founders FactoryreportedLondon · $150K – $200K
How we know: Y Combinator's founder network · Not right? Tell us
Related companies · 4
MonteMonte builds post-training and continual learning infrastructure that transforms general AI models into specialized agents adapted to specific organizational workflows. The platform captures training signals from real work, measures performance against actual constraints, and enables reinforcement learning so models improve continuously from experience.
FreesoloFlash is a platform that trains custom machine learning models for AI agents using user-provided data. It offers fixed-price training runs with downloadable model weights that can be deployed anywhere, positioned as a cheaper and faster alternative to frontier models for routine inference tasks.
RiftenRiften provides a routing layer that sits between a company's applications and large language model APIs, directing each request to the least expensive capable model and using self-hosted open-weight models where possible to reduce inference costs. It also uses the resulting task data to train private, company-owned models on recurring work, serving businesses that run AI-powered applications.
Prodigy ResearchProdigy Research is an AI research lab building a foundation model for quantitative trading, and operates live trading systems in financial markets. It targets the trading and financial-reasoning domain, applying proprietary AI models and agents to equities and delta-neutral strategies.
Companies working in the same space as Sylvian.
Legal entities · 1
corporate structureSylvian Corp.
In the news
Frequently asked questions
- What does Sylvian do?
- Sylvian provides tools for organizations to create AI agents tailored to specific business tasks and workflows.
- Who founded Sylvian?
- Sylvian was founded by William Huang, Niall Kehoe in 2025.
- Who are Sylvian's investors?
- Sylvian's investors include Y Combinator, Amino Capital, Founders Factory.
- Where is Sylvian headquartered?
- Sylvian is headquartered in San Francisco, US.