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windmill

windmill

Alternative to Retool

A developer platform for building workflows, APIs, and internal apps

18k 1.1k428 HN points
AGPL-3.0
 last commit 2026-02-08
low-codeopen-sourceplatformpostgresqlpythonself-hostabletypescript
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About

Open-source developer platform to power your entire infra and turn scripts into webhooks, workflows and UIs. Fastest workflow engine (13x vs Airflow). Open-source alternative to Retool and Temporal.

windmill website preview

Languages

Rust30.6%TypeScript22.5%Svelte22.3%HTML20.8%JavaScript1.3%Python1.2%Shell0.4%PLpgSQL0.4%CSS0.2%Dockerfile0.1%PowerShell0.1%C0%Go0%Awk0%Nix0%Tape0%Nushell0%RenderScript0%

Contributors30

rubenfiszel9551hugocasa1042fatonramadani681centdix458dependabot[bot]432diegoimbert411Guilhem-lm342alpetric276pyranota174gbouv167wendrul161adam-kov117hcourdent102dieriba94+16

Free alternative to Retool

windmill is a free, open-source alternative to Retool. Here's why:

  • 🛠️ Build internal apps
  • 🚀 Automate workflows
  • 💡 Low-code development
  • 🐍 Python & TypeScript
  • ☁️ Self-hostable platform
See all open-source alternatives to Retool
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Platforms
windows
Install
docker_compose
Keywords
low-code
open-source
platform
postgresql
python
self-hostable
typescript
slug: windmill

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