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Retool is an app-building platform for governed internal tools and operational apps. Its listed starting price is $5, with a free plan, but Reddit users report that self-hosting is now listed as Enterprise-only. Developers also describe friction when trying to work with Retool apps through external AI tools. The alternatives below differ in what they let you build and where your app runs; treat starting prices as a first filter, then confirm production costs and deployment terms.
01Why people leave Retool
Self-hosting terms changed
Reddit users report Retool’s docs now place self-hosting on Enterprise, a concern for teams that chose it to control deployment.
Costs can grow with adoption
Retool’s costs can rise as use expands; a Reddit commenter also cites per-end-user pricing as a reason to switch.
AI workflows feel constrained
One Reddit thread describes copying code between Retool and external AI tools, and asks for more direct access to app structure.
02The alternatives, ranked by fit
- Best for self-hosted internal tools
AppsmithAppsmithChoose Appsmith for data-connected internal tools when JavaScript control and self-hosting matter. It is open source, supports Git-based deployment, and lists a free plan with a $15 starting price. That gives teams a clear path to evaluate before committing. Retool apps will need a migration plan: Appsmith is a different platform, not a drop-in runtime for existing apps.
Trade-off: You will rebuild for Appsmith rather than carry Retool apps across unchanged.
7.9/10from
$15/mofree plan - Best for React projects
PlasmicPlasmicPlasmic fits teams that want visual editing inside React apps rather than moving all application work into an internal-tools platform. It is open source and self-hostable, with a free plan and a $39 starting price. It can suit reusable page components and content workflows; assess how your existing Retool data and operations fit before planning a migration.
Trade-off: Its focus is visual editing for React, not a like-for-like internal-app replacement.
7.5/10from
$39/mofree plan - Best for JavaScript app teams
GadgetGadgetGadget combines app development, hosting and a database in a JavaScript platform, making it a candidate for teams building full-stack apps or Shopify and BigCommerce apps. The listed starting price is $35 and it has a free plan. Moving from Retool means adopting Gadget’s runtime and hosting model, so weigh that platform dependence against the convenience of one environment.
Trade-off: Your app becomes tied to Gadget’s runtime.
7.0/10from
$35/mofree plan - Best for on-prem business apps
Claris FileMakerClaris FileMakerClaris FileMaker is worth considering when replacing spreadsheet workflows with custom internal apps and on-prem hosting is a requirement. It is listed as self-hostable, with a $17.50 starting price. Before moving Retool apps, check how your integrations and data model fit FileMaker; the platform change makes migration planning important.
Trade-off: Confirm integration and migration fit before committing.
6.2/10from
$17.50/mo - Best for governed enterprise apps
OutSystemsOutSystemsOutSystems targets governed enterprise applications, legacy modernization and internal workflows, and is listed as self-hostable. It has a free plan, but its starting price is listed as n/a, so get a quote and scope production costs before comparing it with Retool. Expect to evaluate a visual-platform migration rather than a direct transfer of Retool apps.
Trade-off: Pricing is custom, and migration needs careful scoping.
6.8/10from
Freefree plan - Best for business-system modernization
Mendix PlatformMendix PlatformMendix is a fit for teams modernizing business systems or coordinating governed applications across departments. It is listed as self-hostable and has a free plan, with a $918 starting price. That floor makes production-cost scoping important. As with other visual platforms, plan to assess integrations and rebuild needs instead of assuming Retool apps will transfer.
Trade-off: The listed starting price is high; scope production costs and integrations.
7.0/10from
€918/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Retool Retool (current) | 6.8 | $5/mo | Yes | Teams building internal operational apps |
| Appsmith Appsmith | 7.9 | $15/mo | Yes | Internal tools connected to business data |
| Plasmic Plasmic | 7.5 | $39/mo | Yes | Teams adding visual editing to React apps |
| Gadget Gadget | 7.0 | $35/mo | Yes | JavaScript teams building full-stack apps |
| Claris FileMaker Claris FileMaker | 6.2 | $17.50/mo | No | Teams replacing spreadsheet workflows |
| OutSystems OutSystems | 6.8 | Free | Yes | Governed enterprise app teams |
| Mendix Platform Mendix Platform | 7.0 | €918/mo | Yes | Teams modernizing existing business systems |
Questions people ask
Which Retool alternatives are open source?
Appsmith and Plasmic are listed as open source. Appsmith is aimed at data-connected internal tools and offers JavaScript control, self-hosting and Git-based deployment. Plasmic is for visual editing in React apps and is also listed as self-hostable. Check each project’s license and deployment requirements before adopting it.
Which Retool alternatives can be self-hosted?
Appsmith, Claris FileMaker, OutSystems and Mendix are listed as self-hostable; Plasmic is also listed as self-hostable. Retool is listed as self-hostable too, but Reddit users report that its current self-hosted offering is Enterprise-only. Confirm current deployment terms and pricing with each vendor.
What is the cheapest Retool alternative?
Among these picks, Appsmith has the lowest listed starting price at $15 and a free plan. Gadget lists $35 and Plasmic $39, both with free plans. Those prices alone do not establish production cost or equivalent features; compare the plan limits and deployment terms for your expected usage.