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William Bryk

Unicorn founder

CEO at Exa

San Francisco, California, United States

FoundedExa$2.2B · YC

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About

William Bryk studied computer science and physics at Harvard, where he conducted machine learning research. He previously worked as a software engineer at machine learning startup Cresta before founding Exa.

Likely email· guessed from name + firm domain, not firm-published

CEO at ExaYC S21

Intro paths

YC

William went through Y Combinator (Summer 2021) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Nicolas Dessaigne, General Partner at Y Combinator — the partner who ran Exa's batch and knows the company first-hand. YC profile ↗

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In turn, William can intro founders to Exa's investors below.

Exa's investors · 36

137 VenturesSan Francisco49 Palms VenturesSilicon ValleyAmplify PartnersMenlo Park · $500K – $5M checksAndreessen HorowitzMenlo Park · $500K – $50M checks · since 2026ASDF VenturesAtypical VenturesDoverBalaji Srinivasan$10K – $500K checksBenchmarkSan Francisco · $100K – $15M checks · since 2025Craft VenturesSan Francisco · $50K – $50M checksFAST — by GETTYLABSan Francisco · $100K checksFelicis VenturesSan Francisco · $500K – $15M checks · since 2026HaystackSan Francisco · $1M – $3M checks · since 2021Helium-3 VenturesNew YorkLightspeed Venture PartnersMenlo Park · $1M – $5M checks · since 2025Limited VenturesMiamiLombardstreet VenturesWoodside · $500K checksLong Run CapitalNashvilleLux CapitalNew York · $100K – $100M checksMadrona Venture GroupSeattle · $2M – $10M checksNVenturesSanta ClaraNVenturesSingapore · since 2025NVIDIASanta Clara · since 2024Owl Rock CapitalNew YorkPi CampusRome · $55K – $540K checksPioneerToronto, OntarioQuantumlight CapitalRanch VenturesSan FranciscoSaaStr FundSan Francisco · $750K – $5M checksSabrina Hahn FundNew YorkShopifyOttawaSLVCSoma CapitalSacramento · $100K – $300K checks · since 2021SV AngelSan Francisco · $150K – $20M checksTSVCSilicon Valley · $1M checksWndrCoRedwood City · $100K – $10M checks · since 2021Y CombinatorSan Francisco · $500K checks · since 2021

Co-founders at Exa

JWJeffrey Wang
Jeffrey WangFounder
WYWalden Yan
Walden YanCo-Founder
DM
Dan McArdleFounder
JW
Jeff WangFounder
WB
Will BrykFounder

Frequently asked questions

Who is William Bryk?
William Bryk studied computer science and physics at Harvard, where he conducted machine learning research. He previously worked as a software engineer at machine learning startup Cresta before founding Exa.
Where does William Bryk work?
William Bryk is CEO of Exa.
What companies did William Bryk found?
William Bryk founded Exa.

Founder mafias

About this profile. Compiled from public sources — Exa's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights