ToolJet
Open-source Retool alternative for internal apps
About
ToolJet is an open-source alternative to Retool for building internal tools. It provides a drag-and-drop editor, database and API connectors, custom JavaScript and Python support, and granular permissions—all with the option to self-host for complete data control. With 30,000+ GitHub stars, it has the largest open-source community in the internal tools space. ToolJet's self-hosted option is its key differentiator from Retool. Organizations with strict data residency requirements or security policies that prohibit third-party cloud services can run ToolJet on their own infrastructure. The open-source license means no per-user pricing for self-hosted deployments—pay only for infrastructure. Pricing is free for self-hosted open-source use. Cloud plans at $99/month per builder provide managed hosting and support. ToolJet is best for teams that need internal tools, want open-source flexibility, and have the DevOps capability for self-hosting. It is less polished than Retool with a smaller plugin ecosystem, but for organizations where data control and cost predictability are paramount, the trade-off is compelling.
Key Features
- Drag-and-drop editor
- Database connectors
- Custom JS/Python
- Self-hosting
- Granular permissions
- Audit logs
Deals, Discounts & How to Save
Most AI app builders have free tiers suitable for prototyping and MVPs. Export your code and self-host on Netlify, Vercel, or Cloudflare Pages to avoid platform hosting fees. Non-technical founders should evaluate free tiers thoroughly before subscribing.
Pros
- Open source, full data control
- Good self-hosted option
- Growing plugin ecosystem
Cons
- Self-hosting requires DevOps work
- Less polished than Retool
- Smaller community and docs
Pro Tips for ToolJet
Use drag-and-drop editor for rapid prototyping, then export and refine in your IDE for production—the best of both speed and control.
Build incrementally with database connectors—generate core functionality first, then iterate on design and edge cases.
Combine custom js/python with version control—commit after each successful generation to create safe rollback points.
Use self-hosting for rapid prototyping, then export and refine in your IDE for production—the best of both speed and control.
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