Find your path to William
488 people in our graph share verified history with William — schools, employers, funds. One of them is your warm intro.
Cat WuunlockedWilliam: together at Anthropic (2025–2026)
×3William: together at Robinhood
×5William: together at Anthropic
×3William: together at Kleiner Perkins
About
William Hu previously worked at Robinhood and Retool, and currently leads RiskAngle, an AI platform for medical record summarization.
Founder at RiskAngleYC S24
Intro paths
YC
William went through Y Combinator (Summer 2024) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was David Lieb, General Partner at Y Combinator — the partner who ran RiskAngle's batch and knows the company first-hand. YC profile ↗
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In turn, William can intro founders to RiskAngle's investors below.
RiskAngle's investors · 1
Co-founders at RiskAngle
BC
Bill ChenFounder
Experience
- AnthropicMember of Technical Staffcurrent2025 — present
- RiskAngle (YC S24)Founder2024 — 2026
- RetoolSoftware Engineer2022 — 2024
- RobinhoodSoftware Engineer2020 — 2022
- GoogleSoftware Engineer2020
- Kleiner PerkinsEngineering Fellow2020
- NeoNeo Scholar2020
- YHackExecutive Director2019 — 2020
Skills & more
Research5Programming4Public Speaking4
From William's professional profile.
Frequently asked questions
- Who is William Hu?
- William Hu previously worked at Robinhood and Retool, and currently leads RiskAngle, an AI platform for medical record summarization.
- Where does William Hu work?
- William Hu is Founder of RiskAngle.
- What companies did William Hu found?
- William Hu founded RiskAngle.
- Where did William Hu go to school?
- William Hu studied at Y Combinator (S24); Yale University (Master of Science - MS, Computer Science); Yale University (Bachelor of Science - BS, Computer Science).
Founder mafias
Y Combinator mafia10,230
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Garry TanPresident & CEOFounded Y Combinator +1Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianPartnerFounded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded Paradigm +1
+ 10,223 more
Yale University mafia373
Also came through, then founded or led a company.
Michael SeibelBAFounded SocialCamBen SilbermannB.A.Founded Audiobeta +2Justin KanPhysics and PhilosophyFounded Stash +6Jonathan RothbergDoctor of Philosophy (Ph.D.)Founded Raindance Technologies +4Donald IngberM. Phil.Founded Unravel Biosciences +3Kevin RyanBAFounded Transcend Therapeutics +2
+ 366 more
Kleiner Perkins mafia67
Also came through, then founded or led a company.
Eric RiesVenture AdvisorFounded LTSE Group +2Brook ByersFounderFounded Insite Vision +1Jonah GreenbergerEarly(ish)-stage investor / Kleiner-Perkins scoutFounded Bright Exchange +1Raphael RouvinovEngineering FellowFounded Luminopia +1Rebecca LeeKleiner Perkins FellowFounded Elayne +1Jesse HuEngineering FellowFounded Abundant +1
+ 60 more
Anthropic mafia55
Also came through, then founded or led a company.
Mike KriegerChief Product Officer (moved into new 'Labs' division, Jan 2026)Founded InstagramReed HastingsBoard MemberFounded InterPositiveTom BlomfieldMember of Technical StaffFounded Starling Bank +2Sameer DholakiaInvestorFounded SendGrid +1Jeremy JohnsonInvestorFounded 2U +1Houman HaghighiInvestorFounded Techstars
+ 48 more
Robinhood mafia38
Also came through, then founded or led a company.
Vlad TenevCo-founder & CEOFounded HarmonicBaiju BhattCo-founderFounded Cowboy Space CorporationAyan BandyopadhyaySoftware EngineerFounded Finic +1Jason FanSenior Product ManagerFounded Hypercare +1Pryce A. YebesiSoftware EngineerFounded Open Ledger +1Austin HayMartech AdvisorFounded Clarify AI
+ 31 more
Same school
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesCollin WallaceGeneral Partner at Lobby CapitalVictor SantosVictor Scout at One Way Ventures
+ 1,994 more
Also attended Yale University1,080
Ann Miura-KoCo-founding Partner at FloodgateDavid SzeAdvisory Partner at GreylockMichael SeibelPartner Emeritus at Y CombinatorBen SilbermannCo-founder of PinterestZheela QaiserInvestor at Index VenturesAnthony PhilippakisInvestor at GV (Google Ventures)
+ 1,074 more
Also attended Saratoga High School31
Ciara Campbell BowenExecutive Assistant at Sapphire VenturesLeo FonsecaSr. Principal at Graphene VenturesDrew KriensPrincipal at Ironspring VentureChris HulmeSenior Associate at Sorenson VenturesDominick RichiusoInvestor at Founders Circle CapitalAgastya GuptaSenior Associate at Nyca Partners
+ 25 more
Shared employers
Also worked at RiskAngle (YC S24)1
Also worked at Retool19
Ghazi MasoodVenture Partner at Ansa CapitalBryan SchreierPartner at Sequoia CapitalDavid DworskyPrincipal at Emergence Capital PartnersGeorge KuntharaInvestor at Emergence Capital PartnersJustin GageVP of Marketing at Amplify PartnersSerena LiuInvestor at Hummingbird Ventures
+ 13 more
Also worked at Robinhood99
Vlad TenevCo-founder & CEO of RobinhoodBaiju BhattCo-founder of Robinhood; founder of AetherfluxJan HammerInvestor at Index VenturesSangeen ZebInvestor at GV (Google Ventures)Nick ZurickTalent Lead at Pantera CapitalAustin HayInvestor at Khosla Ventures
+ 93 more
Also worked at Google2,000
Kai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIBrian SingermanCo-founder of GPx; Partner Emeritus at Founders FundHunter WalkCo-founder & Partner at HomebrewAydin SenkutFounder & Managing Partner at FelicisLaela SturdyManaging Partner at CapitalGArash FerdowsiCo-founder of Dropbox
+ 1,994 more