Windmill turns scripts into workflows and UIs. Python and TypeScript scripts become apps-rapid internal tool development. The script-to-app transformation is fast. The workflow building is visual. The platform is open source. Teams wanting to turn scripts into tools explore Windmill for rapid app building.

Available on: Web

Louis Corneloup Updated May 26, 2026 · how we evaluate Source windmill.dev ↗

Ratings Across the Web

5 (2 reviews)

Windmill holds an aggregate rating of 5 out of 5 from 2 reviews across G2, last checked September 17, 2026.

G2 2 reviews

5/5

Ratings aggregated from independent review platforms. Learn more

Key Features

Scripts platform
Flows
Apps
Self-hosted
Multi-language
Open source

Pricing

Freemium

Windmill offers a generous free tier with optional paid upgrades for advanced features.

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Is Windmill worth the price?

Great value

Windmill's pricing is very generous, offering a fully functional self-hosted Free tier.

This structure is best for individual developers and small teams looking for powerful automation without high initial costs.

Full Windmill pricing: every plan, hidden costs and alternatives

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Best Windmill Alternatives

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Tooljet Freemium

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Internal.io Freemium

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Windmill FAQ

How does Windmill facilitate internal tool development?

Windmill allows developers to transform Python and TypeScript scripts into workflows and user interfaces, enabling rapid internal tool development. This script-to-app transformation helps teams quickly build and deploy custom applications.

Which teams would benefit most from using Windmill?

Teams that frequently use scripts and need to turn them into functional tools will find Windmill particularly useful. It is designed for developers looking for a platform to build rapid applications and internal utilities.

How does Windmill compare to Retool for building internal tools?

Windmill is an open-source developer platform that turns scripts into workflows and UIs, offering self-hostability and an open-source workflow engine. Retool is also an internal tool builder, but Windmill provides the flexibility of an open-source solution with active development.

What kind of limitations should users be aware of with Windmill?

Users should be prepared for a learning curve and acknowledge that the documentation is still improving. Additionally, Windmill currently has a smaller community and its enterprise features are limited compared to more established platforms, and setup can be complex.

Does Windmill include a free tier for users?

Yes, Windmill is available on a free tier, allowing users to get started without initial cost. Paid plans are also offered for those requiring more extensive usage and additional features.

Can Windmill be self-hosted by organizations?

Yes, Windmill offers self-hostability, which is a key strength of the platform. This allows organizations to deploy and manage the developer platform within their own infrastructure.

Source: windmill.dev

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