# Ruben Fiszel (slim)

> Ruben Fiszel is founder of Windmill. Windmill API + MCP on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/ruben-fiszel/index.md (~750 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/people/ruben-fiszel/index.json · canonical https://www.anchorterminal.com/people/ruben-fiszel/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Founder, Windmill.

Ruben Fiszel founded Windmill, an open-source platform that turns scripts into internal apps and workflows, which joined Y Combinator in summer 2022. He earlier built distributed systems at Palantir, researched compilers at Stanford and ran engineering at a multi-party computation startup.

- LinkedIn: https://www.linkedin.com/in/rubenfiszel/

## What Ruben builds

- [Windmill API + MCP](https://www.anchorterminal.com/tools/windmill.md), graded C, 56/100, in Workflow automation. Code-first engine for scripts, flows and internal apps in 20+ languages, written in Rust, on Windmill Cloud or self-hosted. Founder, Windmill, researched 2026-10-28.

## Backed by

- [Y Combinator](https://www.anchorterminal.com/investors/y-combinator/)
- [Gradient Ventures](https://www.anchorterminal.com/investors/gradient-ventures/)
- [Bessemer Venture Partners](https://www.anchorterminal.com/investors/bessemer-venture-partners/)

## Questions

### Who is Ruben Fiszel?

Ruben Fiszel founded Windmill, an open-source platform that turns scripts into internal apps and workflows, which joined Y Combinator in summer 2022. He earlier built distributed systems at Palantir, researched compilers at Stanford and ran engineering at a multi-party computation startup.

### What does Windmill Labs make?

Anchor Terminal lists Windmill API + MCP from Windmill Labs.

### Who has invested in Windmill Labs?

The sources our research read name Y Combinator, Gradient Ventures and Bessemer Venture Partners.

### How are Ruben's tools graded?

Windmill API + MCP is graded C, 56 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.windmill.dev/
- https://www.ycombinator.com/companies/windmill

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched.