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Ruben Fiszel

InvestorFounder

Founder at Windmill

Paris, Île-de-France, France

FoundedWindmill · YC

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About

Ruben studied computer science at EPFL and conducted research on compiler design at Stanford. He has experience building distributed systems at Palantir, leading engineering at a multi-party computation startup, and contributing open-source projects. He now leads Windmill, an open-source workflow automation platform.

Founder at WindmillYC S22

Intro paths

YC

Ruben went through Y Combinator (Summer 2022) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Nicolas Dessaigne, General Partner at Y Combinator — the partner who ran Windmill's batch and knows the company first-hand. YC profile ↗

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In turn, Ruben can intro founders to Windmill's investors below.

Windmill's investors · 12

Bessemer Venture PartnersSan Francisco · $50K – $100M checksCosmic Venture PartnersAustin · $100K – $5M checksForward Deployed VCFounder CollectiveCambridge · since 2026Fundamental VenturesLakewayGradient VenturesSan Francisco · $100K – $10M checksKima VenturesParis · $50K – $5M checksSequoia CapitalMenlo Park · $100K – $50M checksSoma CapitalSacramento · $100K – $300K checksSuperAngel.FundNew York · $25K – $250K checksUncorrelated VenturesLas VegasY CombinatorSan Francisco · $500K checks · since 2022

Co-founders at Windmill

BD
Brian DistelburgerFounder
DM
Danny MayerFounder
MT
Mark TannerFounder
MS
Max ShawFounder
MM
Mike MayerFounder
RF
Ryan FigliaFounder

Investments

Per curated public sources.

Frequently asked questions

Who is Ruben Fiszel?
Ruben studied computer science at EPFL and conducted research on compiler design at Stanford. He has experience building distributed systems at Palantir, leading engineering at a multi-party computation startup, and contributing open-source projects. He now leads Windmill, an open-source workflow automation platform.
Where does Ruben Fiszel work?
Ruben Fiszel is Founder of Windmill.
What companies did Ruben Fiszel found?
Ruben Fiszel founded Windmill.
What companies has Ruben Fiszel invested in?
Investments tracked here include Arroyo, Cerrion, Coverage Cat, DAGWorks Inc., Defer, Depot, Metriport.

Founder mafias

About this profile. Compiled from public sources — Windmill's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights