Founder Directory
Built by Keitoto
Founders18
Known for these resultsRole56%Role is parsed from founder titles in yc.db. Known for 56% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio100%Bio coverage: 100% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company33%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 33% of these rows have at least one match.School100%School is matched from bios, case-sensitive for acronyms. 100% of these rows have at least one match.
- Mathieu PerezFounder/CEO · COACHS26B2B · San Francisco
- Michael Hodara@maradoh22Founder/CEO · KuliX26B2B · San Francisco
- Ivan VrkicFounder/CTO · CellTypeW26Healthcare · New York
- Berke ArginFounder · CompresrW26B2B · San Francisco
- Ivan Zakazov@ivanzakazovFounder/CEO · CompresrW26B2B · San Francisco
- Kamel Charaf@KamelCharafFounder/CPO · CompresrW26B2B · San Francisco
- Oussama GaboujFounder · CompresrW26B2B · San Francisco
- Anas BouassamiFounder/CEO · BraviF25B2B · Paris
- Luca PegolottiFounder/CTO · NucleoF25Healthcare
- Andres Bran@drecmbFounder/CTO · b12 LabsS25Healthcare · San Francisco
- Alireza Mohammadshahi@alireza_mshiFounder · LeerooX25B2B · London
- Majid YazdaniFounder/CEO · LeerooX25B2B · London
- Diogo ValdiviesoFounder/CTO · WaffleX25Consumer · London
- Pierre DorgeFounder · FileforgeW24B2B · San Francisco
- Ruben FiszelFounder · WindmillS22B2B · Paris
- Daniel Nakhaee-Zadeh GutierrezFounder · AdaptyvS21Healthcare · Lausanne
- Graham Dick@grahamrdickFounder · LyggW21Consumer · San Francisco
- Shubham BansalFounder · Swadesi WayW21Consumer · Delhi
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Mathieu PerezCOACHFounder/CEOSummer 2026B2BSan Francisco, United States4—Michael HodaraKuliFounder/CEOSpring 2026B2BSan Francisco, United States1https://x.com/maradoh22Ivan VrkicCellTypeFounder/CTOWinter 2026HealthcareNew York, United States2—Berke ArginCompresrFounderWinter 2026B2BSan Francisco, United States4—Ivan ZakazovCompresrFounder/CEOWinter 2026B2BSan Francisco, United States4https://x.com/ivanzakazovKamel CharafCompresrFounder/CPOWinter 2026B2BSan Francisco, United States4https://x.com/KamelCharafOussama GaboujCompresrFounderWinter 2026B2BSan Francisco, United States4—Anas BouassamiBraviFounder/CEOFall 2025B2BParis, France2—Luca PegolottiNucleoFounder/CTOFall 2025HealthcareUnknown2—Andres Branb12 LabsFounder/CTOSummer 2025HealthcareSan Francisco, United States3https://x.com/drecmbAlireza MohammadshahiLeerooFounderSpring 2025B2BLondon, United Kingdom3https://x.com/alireza_mshiMajid YazdaniLeerooFounder/CEOSpring 2025B2BLondon, United Kingdom3—Diogo ValdiviesoWaffleFounder/CTOSpring 2025ConsumerLondon, United Kingdom2—Pierre DorgeFileforgeFounderWinter 2024B2BSan Francisco, United States3—Ruben FiszelWindmillFounderSummer 2022B2BParis, France7—Daniel Nakhaee-Zadeh GutierrezAdaptyvFounderSummer 2021HealthcareLausanne, Switzerland25—Graham DickLyggFounderWinter 2021ConsumerSan Francisco, United States1https://x.com/grahamrdickShubham BansalSwadesi WayFounderWinter 2021ConsumerDelhi, India9—
Showing 1–18 of 18 founders
Ruben Fiszel
Founder·Windmill
PRIMARY INFO
RoleFounder· not in title
Team size7
BatchSummer 2022
LocationParis, France
Company statusActive
StageEarly
BIO
Ruben was top of his class MSc in CS at EPFL, did research on compilers from Scala to Hardware at Stanford, built the first open-source library for reinforcement learning for Java, , built distributed systems at scale at Palantir and ran the engineering team at a Multi-Party Computation startup. He is now building Windmill, an open-source alternative to Retool, Pipedream, Airplane that contains the infra to run it and that you can deploy at scale.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Windmill
Open-source platform to turn scripts into internal apps & workflows
