YCF25ยท AISylvian
Specialized AI Agents.
InactiveChecked 18h ago
Founders
- William HuangFounder
- Niall KehoeFounder
Same space
Competitors
Closest in what they build, same category.
ThetaX25Specialized AI for Every JobShared: reinforcement learningActive
KairosX25Specialized AI for Critical IndustriesShared: reinforcement learningActive
FreesoloX25Product Native ModelsShared: reinforcement learningActive
Ooak DataS26We turn company data into training dataShared: reinforcement learningActive
CueBenchS26RL post-training for science reasoning and performance engineeringShared: reinforcement learningActive
Adjacent
Overlapping tags, a different niche.
TraverseW26Research lab solving non-verifiable workShared: reinforcement learningActive
UnifyW23Models that keep learningShared: reinforcement learningActive
MagmaS26Monetize your agent's traces.Shared: reinforcement learningActive
CartpoleX25Building reinforcement learning environmentsShared: reinforcement learningActive
JustAIW24Agentic Marketing PlatformShared: reinforcement learningActive
Also from F25 in AI
Batchmates in Fall 2025.
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AbsurdF25The Creative OS for AI videoActive
AirCapsF25The AI copilot for in-person conversations.Active
AlderF25AI employees for finance, starting with accounts receivable.Active
Aleph LabF25AI language buddy in the games kids loveActive
About Sylvian
Sylvian helps companies build specialized AI agents.
San Francisco, CA, USA
Sylvian: questions
Which YC batch was Sylvian in?
Sylvian was in Y Combinator's Fall 2025 batch (F25).
Is Sylvian still active?
Y Combinator lists Sylvian as inactive.
Who founded Sylvian?
Sylvian's founders, as listed on its YC page: William Huang (Founder), Niall Kehoe (Founder).
Where is Sylvian based?
Sylvian lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.