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The Y Combinator Mafia

10,686 people came through Y Combinator and went on to found or lead other companies.

Francis LarsonWinter 2019 BatchFounded Leif +1 Yuliya RaquelYC AlumniFounded PatternFast +1 Christopher BulowYC Winter 2019Founded Viosera +1 Michael ShalytEntrepreneurship/Entrepreneurial StudiesFounded Aperio +1 Amol JainYC Winter 2019Founded WorkWhile +1 Blake RobertsonYC Winter 2019Founded Tenfold +1 Boateng Opoku-YeboahYC Winter 2019Founded Fuse +1 Jeremy OsborneW19Founded Electric Air +1 David ZengYC Summer 2019Founded Beacons +1 Oleg ZarembaAlumni S23Founded AiSDR +1 Yuriy ZarembaAlumniFounded AiSDR +1 Ruben A. HarrisWinter 2019 BatchFounded Career Karma +1 Timur MeysterYC Winter 2019Founded Career Karma +1 Kenan PulakEntrepreneurshipFounded Atlas +1 Peer RichelsenAlumniFounded Cal +1 Nicky MontanaFounder WC19Founded Cakewalk +1 Abhijeet DwivediYC Summer 2024Founded Central +1 Rahil SondhiYC Summer 2019Founded Tiger Data +1 Jose BethancourtS19 Batch - GradJoyFounded TeacherTalent +1 Faisal YounusYC Summer 2021Founded Pillar +1 Ryan RichtS19Founded Well Principled +1 Justin WoodbridgeS19Founded Bayes +1 Chad MunroeS19Founded Jupiter +1 Naveen QureshiCo-Founder | Sable (S19)Founded Rapidfolio +1 Eric FutoranS19Founded Embrace +1 Thomas DowlingYC Summer 2019Founded FullSeam +1 Geoff SegalS19Founded FullSeam +1 Ethan AndersonStartup FounderFounded SF Compute +1 Mehdi OsmanS19Founded OpenReplay +1 Asa MillerS19Founded Pre +1 Jordan GonenYC Summer 2019Founded Compound +1 Mike MahlkowYC S19Founded Fastgen +1 David NordhausenYC S19Founded Fastgen +1 Constantin SchreiberS19 BatchFounded Fastgen +1 John ChengYC Summer 2019Founded Playnomics +1 Jean Yves StephanSummer 2019 Batch as CEO & Co-Founder of Data MechanicsFounded Data Mechanics +1 Ariel CamusS19 BatchFounded TouristEye +1 Eswar DhinakaranYC Summer 2019Founded Flow +1 Kush TanejaYC Summer 2019Founded FamApp +1 Andy TsenYC Summer 2019Founded Ramen VR +1 Maximiliano EcheverriaYC Summer 2019Founded Flux +1 Xavier PladevallYC Summer 2019Founded Meridian Industries +1 Eduardo PortetYC Winter 2016Founded Meridian Industries +1 Michael McHughYC Summer 2019Founded Blockstamp +1 Ryan NeuS19Founded Blissfully +1 Patrick FinlayYC Summer 2019Founded Solidroad +1 David NewellS19Founded End Close +1 Radu MaziluSummer 2019 BatchFounded PermitPortal +1 Jeremy GrushcowS19Founded Juniper Genomics +1 Alex MatsenovYC Winter 2022Founded Gauss +1 Jordan MillerYC Winter 2020Founded yendo +1 Andrew ChenW20Founded Explo +1 Mark WaiW20Founded Polished +1 Alice DengWinter 2020 & Summer 2021Founded Slope +1 Eric ParkWinter 2020Founded SF Compute +1 Max MusingS20Founded Scholarly +1 Nilay ModiYC Summer 2024Founded Central +1 Brendan FalkYC Summer 2020Founded Hercules +1 Sanjaya WijeratneYC Winter 2020Founded TrueNorth +1 Ehsan KamalinejadYC Winter 2020Founded Visual One +1 Kevin JooW20Founded Operator +1 Lauren (Luna) Ray VegterFounderFounded Thermeleon +1 Daniel PetkevichW20Founded Octane Lending +1 Kevin CoxYC Summer 2025Founded Adaptional +1 Suril KantariaYC Winter 2020Founded Adaptional +1 Kevin ChandraS25Founded The Prompting Company +1 Michelle MarcellineYC Winter 2020Founded The Prompting Company +1 Albert PurnamaW20Founded The Prompting Company +1 Siggi SimonarsonW2020Founded BuildBuddy +1 Rishi RamanS20Founded Intelligent +1 Benjamin NetterYC Winter 2020Founded October +1 Barnaby MaletYC S26Founded machine0 +1 Sanket SauravW20Founded DoSelect +1 Kshitij DixitYCombinator W20Founded Perit.AI +1 Luis Mario GarciaY Combinator W20Founded Titanio +1 Javier GonzalezY Combinator S20Founded Titanio +1 Sergey YudovskiyYC Spring 2025Founded Adentris +1 Tommaso TombaYC W20Founded Moons +1 Diego FischerTech Startup Founder in Training (W20 Batch)Founded CARUPI +1 Tanmaya JainSummer 2020Founded InFeedo’s +1 Shyam SrinivasanSummer 2020 BatchFounded Zitara +1 Evan MurphyYC Summer 2020Founded Zitara +1 Jack PawlikYC Summer 2020Founded Dripos +1 Rami EssaidYC Summer 2020Founded Distil Networks +1 Sy BohyYC Summer 2020Founded Instamotor +1 Ayan BandyopadhyayYC Summer 2020Founded Finic +1 Kevin UnkrichYC Summer 2020Founded Superpower +1 Chris OsbornYC Summer 2022Founded Dialect +1 Angelo (KC) HuangYC Summer 2020Founded LeadIQ +1 Gabe RuttnerWinter 2024Founded Hatchet +1 Andrew ChangYC Summer 2020Founded Paxos +1 Mesongo SibutiYC Summer 2020Founded Cloud9 Money +1 Tesh MbaabuYC Summer 2020Founded Cloud9 Money +1 Saurabh NangiaMeshFounded Datamonk +1 Ian McHenryS20Founded In Stock +1 Sonakshi NathaniYC Summer 2020Founded Bikayi +1

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Frequently asked questions

What is the Y Combinator mafia?: The Y Combinator mafia is the network of 10,686 people who came through Y Combinator and went on to found or lead other companies, including Leif, PatternFast, Viosera, Aperio, WorkWhile.
Who is in the Y Combinator mafia?: Notable members include Francis Larson (Leif), Yuliya Raquel (PatternFast), Christopher Bulow (Viosera), Michael Shalyt (Aperio), Amol Jain (WorkWhile), Blake Robertson (Tenfold), Boateng Opoku-Yeboah (Fuse), Jeremy Osborne (Electric Air), among 10,686 tracked members.
What companies did Y Combinator alumni found?: Companies founded by Y Combinator alumni include Leif, PatternFast, Viosera, Aperio, WorkWhile, Tenfold, Fuse, Electric Air, Beacons, AiSDR.