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The Y Combinator Mafia

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

Fabien DevosYC Summer 2022Founded Vybe +1 Paul Sanglé-FerrièreYC Spring 2025Founded Workflow +1 David Oort AlonsoYC Spring 2025Founded Bloom +1 Sirian MaathuisX25Founded Bloom +1 Viraj MehtaX25Founded TensorZero +1 Shawn PatelP25Founded Almond +1 Andrey AvtomonovX25 batchFounded Giskard +1 Soami KapadiaYC Spring 2025Founded YouLearn +1 David ZhuYC Spring 2025Founded Reevo +1 Tyler ChenYC Spring 2025Founded Subtle +1 Lev KokotovP25Founded PostgresML +1 Daanish KhaziX25Founded Paper Instruments +1 Baptiste DebeverYC Spring 2025Founded Feedier +1 Courtne MarlandP25Founded Lyra +1 Henry KwonP25Founded Lyra +1 Rajit KhannaYC Spring 2025Founded Prism +1 Yoav ZimmermanYC Spring 2025Founded Third Chair +1 Tugce BulutX25Founded Streetbees +1 Vivek IsukapalliYC Fall 2024Founded ValueMate +1 Nizar Abi ZaherYC Winter 2023Founded Orchid +1 Adam Wazzanx25Founded Orchid +1 Shivum PandoveX25Founded Kairos +1 Dmitry KarpovYC Spring 2025Founded Adentris +1 Linus TalackoYC Spring 2025Founded Lyrebird Health +1 Ajith GovindX25Founded Cactus +1 Jason GrossYC Spring 2025Founded Petal +1 Nicole LuYC Winter 2022Founded sieve +1 Kevin ZhangYC Spring 2025Founded Cohesive +1 Michael KimYC Summer 2025Founded Nexo +1 Paul BaeYC Summer 2025Founded Gitdot +1 Abhay GuptaS25Founded bidgely +1 Dante VaisbortS25Founded Haylon Technologies +1 Linus MalménS25Founded Zaver +1 Jonas MorgnerS25Founded TradeLink +1 Lorenz NeunerYC Summer 2025Founded TradeLink +1 Royce ArockiasamyYC Summer 2025Founded Pleom +1 Peter TribelhornYC Summer 2021Founded Hera +1 Chia-Lun WuYC Summer 2021Founded Hera +1 Warren Wijaya WangS25Founded Milk Moovement +1 Saurav KumarS25Founded Euler Motors +1 Aram ShatakhtsyanYC Summer 2025Founded Modelence +1 Khalid AshmawyYC Summer 2025Founded Munify +1 Marvin Abdel-MassihF25Founded Uplane +1 Alex FormanYC Fall 2025Founded Parse +1 Amir HannaFall BatchFounded Parrot +1 Erik DahlFall 2025Founded Parrot +1 Julia HudeaYC Spring 2026Founded Parrot +1 Assem ChammahYC Fall 2025Founded Nexus +1 Shady Al ShohaF25 batchFounded Nexus +1 Gurish SharmaYC Summer 2019Founded Aspect +1 Edison ChiuYC Fall 2025Founded Aspect +1 Bright XuYC Summer 2019Founded Aspect +1 Ayush GargYC Fall 2025Founded Portkey.ai AI +1 Aman MishraYC Fall 2025Founded Rentify +1 Vivek NairYC Fall 2025Founded Multifactor +1 Raman VarmaYC Fall 2025Founded Kestrel +1 Koby Conrad(F25) Early Stage StartupsFounded Sunflower +1 Jeff LiuYC Spring 2026Founded FinalDose +1 Janet LiuYC Fall 2024Founded Oxus +1 Sergio CharlesYC Fall 2025Founded Thesis +1 Lucas NgooYC Fall 2025Founded Carousell +1 Yolanda CaoYC Fall 2025Founded Everest +1 Spencer McKeeYC Fall 2025Founded Everest +1 Axel La PiraYC Spring 2026Founded Alan +1 Lorcan O CathainYC Fall 2025Founded Lua Global Inc +1 Erik VankF25Founded Narrative +1 Victor ChapmanF25Founded Narrative +1 Aryan SawhneyYC Fall 2025Founded Narrative +1 Toni LopezYC Fall 2025Founded Karumi +1 Jerry ZhangYC Fall 2025Founded Clinicode +1 Stephan WolskiYC Summer 2024Founded Lightberry +1 Rishabh DhariwalYC Fall 2025Founded Zarna +1 Sam GormanYC Fall 2025Founded Rivet +1 François CholletYC Winter 2026Founded ARC Prize Foundation +1 Mike KnoopYC Winter 2026Founded Zapier +1 Jamie SunderlandSoftware EngineerFounded Coasts +1 Bryant ChouYC Spring 2026Founded Ploy +1 Zeeshan AhmedYC Spring 2026Founded Clara.com Clara.com Clara.com +1 Caitlin SwiftYC Spring 2026Founded Clara.com Clara.com Clara.com +1 Yash RathodYC Winter 2026Founded Origin +1 Malhar BhideYC Winter 2026Founded Origin +1 He SongW26Founded SOLACE +1 Alberto RosasYC Winter 2026Founded GAMIUM +1 Shubham MalhotraYC Winter 2026Founded GamingMonk +1 Eric ZhuYC Winter 2026Founded Axis +1 Ian WangYC Winter 2026Founded Axis +1 Lyem NingthouYC Winter 2026Founded Asimov +1 Andrew ReiterYC Winter 2026Founded 10x Science +1 Milan BhandariS23Founded /dev/fast +1 Matthew MooreYC Winter 2026Founded Milliray +1 Amit YadavWinter 2026Founded Fern +1 Robert XuYC Winter 2023Founded Fern +1 Brianna LinYC Winter 2026Founded Copperlane +1 Eric ZhangYC Winter 2011Founded Sponge +1 Ishan SharmaYC Winter 2026Founded Sellscale +1 Charu SharmaYC Winter 2026Founded Cureskin +1

+ 9,314 more →

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 Vybe, Workflow, Bloom, TensorZero, Almond.
Who is in the Y Combinator mafia?: Notable members include Fabien Devos (Vybe), Paul Sanglé-Ferrière (Workflow), David Oort Alonso (Bloom), Sirian Maathuis (Bloom), Viraj Mehta (TensorZero), Shawn Patel (Almond), Andrey Avtomonov (Giskard), Soami Kapadia (YouLearn), among 10,658 tracked members.
What companies did Y Combinator alumni found?: Companies founded by Y Combinator alumni include Vybe, Workflow, Bloom, TensorZero, Almond, Giskard, YouLearn, Reevo, Subtle, PostgresML.