Open source alternatives to Retool
4 free tools that do the job of Retool, most stars first. All are web apps you can run on your own server.
4 alternatives
Sorted by most stars.-
ToolJet
A low-code platform for internal tools, dashboards and workflows.
Web app
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Appsmith
Build internal tools and admin panels on a drag-and-drop canvas.
Web app
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Budibase
A low-code platform for internal apps, forms and automations.
Web app
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Windmill
Turn scripts into workflows, apps and internal tools, with a built-in job runner.
Also an alternative to Zapier
More alternatives in Automation and no-code
All Automation and no-code tools
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Ask us to add itAbout these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.