Windmill is an open-source developer platform for internal tools and automation. You write scripts in languages such as Python, TypeScript, Go or Bash, and Windmill turns them into APIs, scheduled jobs, multi-step flows and UIs with permissions, secrets and logs handled for you.
Key features
- Scripts in many languages become endpoints and jobs
- Visual flow builder for multi-step workflows
- Low-code app builder for internal UIs
- Scheduling, retries, secrets and audit logs
- Self-hostable
- AI Sessions: an agent that builds scripts, flows and apps with workspace context (Oct 20, 2026)
Who it's for
Windmill suits engineering and data teams replacing cron jobs, Retool-style tools and ad hoc scripts.
Common use cases
- Internal admin tools
- Scheduled data jobs
- Ops runbooks and automations
- Webhook-driven workflows
Pricing
Windmill is freemium: the self-hosted Community Edition is free, and Team and Enterprise plans are paid. Check the official site for current plan details.
Why Windmill is trending
On Oct 20, 2026, Windmill launched AI Sessions, an agent that builds scripts, flows and apps using the whole workspace as context.
Sources: www.windmill.dev
How to get started with Windmill
- Visit the official Windmill website at https://www.windmill.dev and read the quickstart in the docs.
- Sign up or install it, depending on whether you use the hosted service or the open-source version.
- Try it on a small project first, then connect it to your existing stack and CI.
- Review the pricing page before scaling usage so costs stay predictable.
Is Windmill worth it?
Windmill is a well-established tool with an active team and frequent releases in October 2026. For teams that match the use cases above, it's worth evaluating against the alternatives listed here, and the freemium model makes it easy to try before committing.
Alternatives
- Retool: internal tool builder
- n8n: workflow automation
FAQ
What is Windmill?
Windmill is an open-source platform that turns scripts into workflows, scheduled jobs and internal apps, now with AI Sessions that build them for you.
Is Windmill open source?
Yes, and the self-hosted Community Edition is free.
What languages does Windmill support?
Python, TypeScript, Go, Bash and more.
Windmill vs Retool?
Windmill is code-first and open source, covering both workflows and UIs.