OSS Alts.

Search alternatives
Internal Tools 4 alternatives tracked

Open-source alternatives to Retool

Retool is a low-code internal tool builder that lets engineering and operations teams build admin dashboards, CRUD interfaces, and data viewers by connecting SQL queries and API calls to pre-built UI components. It reduces the engineering time for internal tooling by handling the UI plumbing — tables, forms, buttons — while developers write the data queries.

Last reviewed

Share: X Reddit HN LinkedIn

The alternatives

appsmith

★ 39,745 TypeScript Apache-2.0

Platform to build admin panels, internal tools, and dashboards. Integrates with 25+ databases and any API.

appsmithorg/appsmith Updated 2026-05-05

ToolJet

★ 37,869 JavaScript AGPL-3.0

ToolJet is the open-source foundation of ToolJet AI - the enterprise app generation platform for building internal tools, dashboard, business applications, workflows and AI agents 🚀

ToolJet/ToolJet Updated 2026-05-06

budibase

★ 27,890 TypeScript NOASSERTION

AI agents, automations and apps that run your operations. Model agnostic.

budibase/budibase Updated 2026-05-05

lowdefy

★ 2,965 JavaScript Apache-2.0

Build apps that AI can generate, humans can review, and teams can maintain. Config that works between code and natural language.

lowdefy/lowdefy Updated 2026-05-05

Comparison notes

Appsmith and ToolJet are the most mature OSS alternatives, both covering Retool's core use case of connecting databases and APIs to drag-and-drop UI components. Budibase takes a similar approach with an emphasis on business process automation. The main gaps vs. Retool: Retool's breadth of native integrations (Salesforce, Stripe, custom connectors) exceeds current OSS alternatives. Retool's AI features for auto-generating queries and components have no OSS equivalent. Appsmith and ToolJet have active development but their enterprise feature depth (audit logs, fine-grained permissions) lags Retool's.

Migration tips

  • Export Retool apps as JSON from the Resource > Export menu — community tools exist to assist conversion
  • Evaluate Appsmith vs. ToolJet for your specific connectors — check their native database and API integration lists against your requirements
  • Recreate Retool's resource connections (database credentials, API keys) in your OSS tool's data source manager
  • Retool's query library does not export cleanly — document queries from each app before migration
  • Run both Retool and the OSS tool in parallel during the migration, auditing each internal tool before cutting over users

FAQ

Can I fully replace Retool with an OSS tool?

Feature parity varies. Most OSS alternatives cover 70-90% of core workflows, but may lack polish, integrations, or specialized features. Pilot the alternative with a subset of your team before fully committing.

What's the cost of self-hosting?

Plan for ~$5-50/month in VPS costs (DigitalOcean, Hetzner, etc.) plus 2-8 hours/month in maintenance. For a team of 20+, self-hosting usually breaks even against SaaS pricing within 6-12 months.

Which alternative should I pick?

Sort by GitHub stars (a proxy for community health), check the last-pushed date (avoid unmaintained projects), and read recent issues to gauge responsiveness.