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Fulcrum

YC S25

San Francisco, US · Founded 2025 · 2 employees · 10 known investors

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Fulcrum Research is a lab that develops methods and tools to elicit better outputs from AI models and measure their capabilities, particularly on difficult-to-verify tasks. The company works with organizations seeking to optimize agent performance on complex applications.

Also known as Fulcrum AI Inc.

AI & Machine LearningData & InfrastructureEnterprise SoftwareUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

Fulcrum was founded in 2025 by Kaivalya Hariharan and Uzay Girit.

KHKaivalya Hariharan
Kaivalya HariharanCEOKaivalya Hariharan is an MIT student studying computer science and mathematics with research interests in AI safety and alignment. He has published work on machine learning safety at NeurIPS, completed research internships at Redwood Research and Truthful AI, and founded MAIA, an MIT AI alignment initiative.
UGUzay Girit
Uzay GiritCTOUzay Girit studied mathematics and computer science at MIT and conducted machine learning research on in-context learning and scaling laws. He is currently developing oversight interfaces for AI agents at Fulcrum.

Investors · 10

Ankona CapitalreportedSouthern California · $5M – $15M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Bessemer Venture PartnersreportedSan Francisco · $50K – $100M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Initialized CapitalreportedSan Francisco · $1M – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Kennet PartnersreportedLondon · $8.6M – $32.4M

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Sabrina Hahn FundreportedNew York

How we know: Y Combinator's founder network · Not right? Tell us

Sherpalo VenturesreportedMenlo Park

How we know: Y Combinator's founder network · Not right? Tell us

SpringTime VenturesreportedBoulder · $500K – $1M

How we know: open dataset · 5k.vc investor directory · Not right? Tell us

Twenty Two VenturesreportedPalo Alto · $50K – $250K

How we know: Y Combinator's founder network · Not right? Tell us

Valkyrie Ventures Management, LlcreportedPark City

How we know: Y Combinator's founder network · Not right? Tell us

Legal entities · 1

corporate structure
Fulcrum AI Inc.

In the news

Fulcrum: The Agentic Debugger for AI Systemsycombinator.com · Feb 2026Fulcrum: The Agentic Debugger for AI Systemsycombinator.com · Aug 2025

Frequently asked questions

What does Fulcrum do?
Fulcrum Research is a lab that develops methods and tools to elicit better outputs from AI models and measure their capabilities, particularly on difficult-to-verify tasks. The company works with organizations seeking to optimize agent performance on complex applications.
Who founded Fulcrum?
Fulcrum was founded by Kaivalya Hariharan, Uzay Girit in 2025.
Who are Fulcrum's investors?
Fulcrum's investors include Y Combinator, Ankona Capital, Bessemer Venture Partners, Initialized Capital, Kennet Partners, Sabrina Hahn Fund, Sherpalo Ventures, SpringTime Ventures and 2 more.
Where is Fulcrum headquartered?
Fulcrum is headquartered in San Francisco, US.