Windmill
Open-source developer platform for scripts, flows and apps
Windmill is a data integration & ETL tool for Developers, offered as open source ($10/mo). Founded in France in 2022.
About Windmill
Windmill is an open-source developer platform for scripts, workflows and internal tools, built by Windmill Labs, a startup founded by Ruben Fiszel. Its premise is that most internal automation starts as a script: you write code in Python, TypeScript, Go, Bash, SQL, PHP or other languages, and Windmill turns it into a shareable job with an auto-generated UI, permissions, logs and an API endpoint.
Scripts can be chained into flows with branches, loops, retries, approvals and error handlers, triggered by schedules, webhooks, HTTP routes, emails or message queues. An app builder creates dashboards and admin panels on top of those scripts, and a web IDE with dependency management and AI assistance speeds up development, while a CLI and git sync let teams manage everything as code. The execution engine is designed for low overhead and high throughput, which makes Windmill viable for data pipelines and background jobs. The Community edition is free to self-host; the cloud Team plan is priced per user plus compute, and Enterprise adds SSO, audit logs, SLAs and scaling features.
Windmill suits engineering and data teams that want one platform to replace a mix of cron jobs, Airflow DAGs and Retool apps. It is code-first, so non-technical users will prefer Zapier, Make or n8n, and its community is smaller than older tools. Airflow and Prefect remain more common for large data orchestration, Retool is more mature for complex UIs, and Temporal is better for long-running, durable application workflows.
Key features of Windmill
- Scripts to workflows
- Schedules and triggers
- Auto-generated UIs
- App builder
- Multi-language
- Self-hosting
Pros and cons
Pros
- Very fast engine
- Code-first
- Open source
- Replaces Airflow + Retool for many
Cons
- Developer-oriented
- Smaller community
- Learning curve
- Enterprise features paid
Windmill pricing
Windmill uses a open source model.
| Plan | Price | Includes |
|---|---|---|
| Community Edition | $0 | Self-hosted, unlimited executions, max 10 users with SSO |
| Cloud Team | $10 / seat/mo | Managed cloud; per seat (from page structured data) |
| Enterprise (self-hosted) | from $120 / mo | $20/dev/mo + $50/worker/mo compute; audit logs, SAML |
| Enterprise (cloud) | Custom | Based on seats and compute units |
Source: www.windmill.dev · checked on Oct 20, 2026
How Windmill compares in Data integration & ETL
- Rank by votes
- #1 / 16
- Starting price
- $10
- Free alternatives
- 2
0 votes from members
90% below the category median ($100/mo)
Free or open-source tools in Data integration & ETL
Windmill ranks #1 of 16 data integration & etl tools by community votes and is priced below most tools in the category.
Common use cases
- 1Ops scripts with UIs
- 2Data pipelines
- 3Internal tools from code
- 4Scheduled jobs
Best for
Developers wanting code-first automation.
Not ideal for
No-code users.
Integrations
- Postgres
- Slack
- GitHub
- S3
- OpenAI
- REST
- Webhooks
Our take
Windmill is the developer's open-source automation platform.
FAQ
- What is Windmill?
- Windmill is a Data integration & ETL tool: Open-source developer platform for scripts, flows and apps.
- How much does Windmill cost?
- Windmill is Open source; there is no mandatory paid plan.
- What does Windmill integrate with?
- Windmill integrates with Postgres, Slack, GitHub, S3, OpenAI, REST and more.
- Which platforms does Windmill support?
- Windmill is available on web.
- Who is Windmill for?
- Developers wanting code-first automation.
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