ToolJet

Internal Tools Open source

An open-source low-code platform for building and deploying custom internal tools rapidly.

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About

What is ToolJet?

ToolJet is an open-source low-code development platform for building and deploying custom business applications and internal tools. With 50+ built-in components, support for 50+ data source integrations, and a visual workflow builder, ToolJet empowers teams to ship internal apps without heavy engineering investment. It supports custom JavaScript and Python, real-time collaboration, and a self-hostable architecture — making it a compelling open-source alternative to Retool for privacy-conscious teams.

Pros & Cons

Pros

  • Fully open-source and self-hostable
  • 50+ pre-built UI components and widgets
  • 50+ data source connectors including databases and SaaS APIs
  • Visual workflow automation builder
  • Real-time collaboration for team development
  • Custom JavaScript and Python for advanced logic
  • Growing plugin and community marketplace

Cons

  • UI builder can feel less refined than Retool
  • Documentation occasionally lags new features
  • Some advanced features require the paid cloud plan
  • Performance with very large components trees needs optimization
  • Smaller community than Retool or Appsmith

Use Cases

Building internal admin tools and data dashboards Creating approval workflows for business operations Building customer support and back-office management panels Rapid internal tool prototyping for engineering teams Teams seeking a self-hosted Retool alternative
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