Who is in the Y Combinator mafia?

Notable members include John Gedmark (Astranis), Savanna Silver (Salient), Jay Fulcher (Zenefits), Einar Vollset (reMail), Emir Sandhu (OpenBiome), Daniel Barabander (Haywheel), Will Patterson (CareRev), Brian Crain (Epicenter), among 10,658 tracked members.

What companies did Y Combinator alumni found?

Companies founded by Y Combinator alumni include Astranis, Salient, Zenefits, reMail, OpenBiome, Haywheel, CareRev, Epicenter, Disqus, Camber.

The Y Combinator Mafia

10,658 people came through Y Combinator and went on to found or lead other companies.

John GedmarkYC Winter 2016Founded Astranis Savanna SilverYC Winter 2023Founded Salient Jay FulcherYC Winter 2013Founded Zenefits Einar VollsetYC Winter 2009Founded reMail Emir SandhuYC Winter 2020Founded OpenBiome Daniel BarabanderYC Summer 2016Founded Haywheel Will PattersonYC Summer 2016Founded CareRev Brian CrainYC Summer 2025Founded Epicenter Daniel HaYC Summer 2007Founded Disqus Phil NolanYC Winter 2021Founded Camber Saulo TristaoYC Winter 2020Founded Facio Ticiano VieiraWinter 2020 BatchFounded Facio Nick RamsayW22Founded Circular Vinay RameshWildfire (S17)Founded Wildfire Christina CacioppoYC Winter 2018Founded Vanta Patrick DeemYC Winter 2017Founded Voodoo Manufacturing Anton VaisburdYC Winter 2021Founded Datrics Kirill KirikovYC Winter 2021Founded Datrics Alexander D. Wissner-GrossYC Summer 2008Founded CO2Stats Prat MallickYC Summer 2025Founded Riverbank Matt BrownYC Winter 2016Founded Bonsai Liz WesselVisiting Group PartnerFounded WayUp Tomás Álvarez BelónYC Summer 2021Founded Canopi Chris RogersYC Summer 2012Founded Instacart Dan ShellardYC Summer 2017Founded Gameday Alex MittalYC Summer 2012Founded FundersClub Boris SilverYC Summer 2012Founded FundersClub Pat MatthewsYC Summer 2012Founded FileStack Elis HodzicYC Summer 2024Founded Scape Drake Austin RehfeldYC Summer 2018Founded Demeanor.co Rebecca WilsonYC Winter 2018Founded AesculaTech Avichal GargPart Time PartnerFounded Electric Capital Sachin JaitlyYC Winter 2016Founded flexEngage Charlie PintoYC Winter 2012Founded SlidePay Varun AgarwalYC Winter 2015Founded Razorpay Adam HansmannYC Summer 2016Founded The Athletic Liza GurtinS23Founded Accend Judith DadaYC Summer 2023Founded Langdock Rahul MathurYC Winter 2021Founded Verak Evaline TsaiYC Summer 2017Founded Cambridge Cancer Genomics Roman RothaermelYC Summer 2021Founded Mable Rait OjasaarYC Winter 2023Founded Escape Ari HelgasonYC Winter 2010Founded Fabricly Rachel ten BrinkSummer 2015Founded Scentbird Fabrice de GaudemarYC Winter 2018Founded Sqreen Mirella MosheS21Founded Output Biosciences Adi MashiachS21Founded Output Biosciences Richard MaStartup AcceleratorFounded Quantstamp Rabia KhanW-21Founded Serna Bio Juan VásquezYC Summer 2012Founded Tastemaker Mariano WernerYC Summer 2021Founded Examedi Jimmy QianYC Summer 2020Founded Osmind Adam ScharfYC Winter 2013Founded BuildZoom David DeakYC Winter 2019Founded Maple Materials Arnelle AnsongYC Winter 2020Founded Edlyft David MlčochYC Winter 2025Founded Asteroid Jakub JurovychYC Summer 2019Founded Deepnote Misha EsipovYC Summer 2016Founded Nova Credit Sid SijbrandijYC Winter 2015Founded GitLab Richard AbermanYC Summer 2009Founded WePay Mauricio OrtizYC Spring 2026Founded Kimpton Anne MazetYC Summer 2015Founded OpenInvest Ooshma GargVisiting Group PartnerFounded Gobble Maia BittnerYC Winter 2014Founded Gobble Kathryn MinshewYC Winter 2012Founded The Muse Alexandre MatosYC Summer 2021Founded Geostar Dave MessinaY Combinator (S15)Founded Cofactor Genomics Harshil MathurYC Winter 2015Founded Razorpay Shashank KumarYC Winter 2015Founded Razorpay Will KantarosYC Winter 2022Founded Decent Russell KleinYC Winter 2022Founded Sendme, Inc David RobertsYC Winter 2026Founded 10x Science Amit GuptaYC Continuity AdvisorFounded SNR VC Sebastien CoutureYC Summer 2025Founded Epicenter Liam HorneFounded ETHGlobal Huan LiYC Winter 2019Founded JuziBot David Mc GovernYC Winter 2024Founded Basalt Muneeb AliEntrepreneurshipFounded Stacks Todd GoldbergWinter 2014 batchFounded Eventjoy Steph ShyuEdTech cohort (ImagineK12)Founded AdmitSee Eric RiesYC Summer 2017Founded LTSE Services, Inc.Michael HerzigYC Winter 2022Founded Onboard.io Fred SweeneyYC Summer 2021Founded VedaBio Richmond BasseyYC Winter 2020Founded Bamboo Yotam RosenbaumEntrepreneurship/Entrepreneurial StudiesFounded Earbits Niama El BassunieYC Winter 2017Founded WaystoCap Sam BlackmanYC Winter 2018Founded Nuvocargo Sam ParkYC Fall 2024Founded Endstack John EganFounderFounded Sendoid Ayo ArikaweW19 ClassFounded Thrive Agric Tejinder SinghYC Summer 2026Founded Trident Justin LouieYC Winter 2020Founded Jenfi Sandhya SriramYC Winter 2019Founded Shiok Meats Nazli CamYC Summer 2023Founded HockeyStack Oguzhan AtayYC Summer 2017Founded BillionToOne Tommy TsaiW2012Founded Shopular

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Frequently asked questions

What is the Y Combinator mafia?: The Y Combinator mafia is the network of 10,658 people who came through Y Combinator and went on to found or lead other companies, including Astranis, Salient, Zenefits, reMail, OpenBiome.
Who is in the Y Combinator mafia?: Notable members include John Gedmark (Astranis), Savanna Silver (Salient), Jay Fulcher (Zenefits), Einar Vollset (reMail), Emir Sandhu (OpenBiome), Daniel Barabander (Haywheel), Will Patterson (CareRev), Brian Crain (Epicenter), among 10,658 tracked members.
What companies did Y Combinator alumni found?: Companies founded by Y Combinator alumni include Astranis, Salient, Zenefits, reMail, OpenBiome, Haywheel, CareRev, Epicenter, Disqus, Camber.