William Bryk
Unicorn founderco-founder/CEO at Exa
San Francisco, California, United States
FoundedExa$2.2B · YC
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
- w•••@exa.aireveal75% confident
co-founder/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 ↗
→
In turn, William can intro founders to Exa's investors below.
Exa's investors · 16
137 VenturesSan FranciscoAndreessen HorowitzMenlo Park · $500K – $50M checks · since 2026Balaji Srinivasan$10K – $500K checksBenchmarkSan Francisco · $100K – $30M checks · since 2025Felicis VenturesSan Francisco · $500K – $15M checksHaystackSan Francisco · $1M – $3M checksHelium-3 VenturesNew YorkLightspeed Venture PartnersMenlo Park · $1.7M – $87M checks · since 2025Lombardstreet VenturesWoodside · $500K checksNVenturesSanta ClaraNVIDIASanta Clara · since 2024Sabrina Hahn FundNew YorkSLVCTSVCSilicon Valley · $1M checksWndrCoRedwood City · $100K – $10M checksY CombinatorSan Francisco · $500K checks · since 2021
Co-founders at Exa
Founder 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 ↗
→
In turn, William can intro founders to Exa's investors below.
Exa's investors · 16
137 VenturesSan FranciscoAndreessen HorowitzMenlo Park · $500K – $50M checks · since 2026Balaji Srinivasan$10K – $500K checksBenchmarkSan Francisco · $100K – $30M checks · since 2025Felicis VenturesSan Francisco · $500K – $15M checksHaystackSan Francisco · $1M – $3M checksHelium-3 VenturesNew YorkLightspeed Venture PartnersMenlo Park · $1.7M – $87M checks · since 2025Lombardstreet VenturesWoodside · $500K checksNVenturesSanta ClaraNVIDIASanta Clara · since 2024Sabrina Hahn FundNew YorkSLVCTSVCSilicon Valley · $1M checksWndrCoRedwood City · $100K – $10M checksY CombinatorSan Francisco · $500K checks · since 2021
Co-founders at Exa
Experience
- ExaCo-Founder and CEOcurrent2021 — presentSan Francisco Bay Area
- CrestaSoftware Engineer2019 — 2021San Francisco Bay Area
- Zoox Inc.Intern2018San Francisco Bay Area
- Harvard Undergraduate Robotics ClubCo-President2017 — 2018Cambridge, MA
- Harvard Undergraduate Robotics ClubProject Lead2016 — 2017Cambridge, MA
- SpaceXIntern2016Hawthorne, CA
Skills & more
Javascript2python4Robotics4Matlab2C++1
Languages English · French · Hebrew
From William's professional profile.
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 co-founder/CEO of Exa.
- What companies did William Bryk found?
- William Bryk founded Exa.
- Where did William Bryk go to school?
- William Bryk studied at Harvard University (A.B, Joint Computer Science and Physics); Ramaz Upper School; Technion - Israel Institute of Technology (Physics and Engineering).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Technion mafia32
Also came through, then founded or led a company.
Dan DinnarFounded HexaTier +1Ben BernsteinBAFounded Twistlock +1Amichai ShulmanAdjunct TeacherFounded Kanopy Security +1Michael ShalytAssociate ResearcherFounded Aperio +1Gordon DaughertySenior Management ProgramFounded Colossal BiosciencesSergio FogelMScFounded Datanomik
+ 25 more
Same school
Also attended Harvard University1,558
Alfred LinPartner at Sequoia CapitalChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzSarah TavelVenture Partner at BenchmarkDanny RimerPartner at Index VenturesLaela SturdyManaging Partner at CapitalGBill GatesCo-founder of Microsoft; Chair of the Gates Foundation
+ 1,552 more
Also attended Technion - Israel Institute of Technology163
Roi Bar-KatManaging Director at Intel CapitalGil GorenPartner at 83NorthOren YungerInvestor at GGV CapitalGordon DaughertyCo-Founder & Chairman at Capital FactoryBoaz PeerManaging Director, Israel & Europe at Qualcomm VenturesGal GitterPartner at Alpha Partners
+ 157 more
Shared employers
Also worked at Exa12
Peter FentonGeneral Partner at BenchmarkTobi CokerDeal Partner at Felicis VenturesGuru ChahalPartner at Lightspeed Venture PartnersNnamdi IregbulemPartner at Lightspeed Venture PartnersArnav SahuPartner at Peak XV PartnersAniq KassamManaging Director at FAST — by GETTYLAB
+ 6 more
Also worked at Cresta11
Saam MotamediInvestor at Greylock PartnersJake SeidGeneral Partner at Ballistic VenturesCorinne RileyPartner at Greylock PartnersNan ZhouDirector at Qualcomm VenturesWally WangGeneral Partner at SAV (Scale Asia Ventures)Chris KoehlerSenior Advisor (CMO Box) at Grishin Robotics
+ 5 more
Also worked at Zoox Inc.25
Shahin FarshchiPartner at Lux CapitalVrinda GuptaInvestment Analyst at Titan CapitalBrian NicholsGM - Angel Squad, Venture Partner at Hustle FundEddie FishmanAdvisor at Commonweal VenturesSasha OstojicVenture Partner at Playground GlobalLaurie YolerVenture Partner at Playground Global
+ 19 more
Also worked at SpaceX148
Roelof BothaAdvisor & former Steward at Sequoia Capital; SpaceX board memberSteve JurvetsonCo-founder of Future VenturesAsanka JayasuriyaPortfolio Support at 8VCJustin RoseInvestment Team at 8VCGarry HillInvestment at Makers FundHelen LiangFounder & General Partner at FoundersX Ventures
+ 142 more