Retool alternatives for building internal tools

Here are solid Retool alternatives for building internal tools, grouped by the kind of use case they fit best.

Low-code / internal tool builders

These are the closest alternatives to Retool.

• Appsmith

  • Open source
  • Good for CRUD apps, admin panels, dashboards
  • Self-hostable
  • Strong if you want more control and lower cost

• ToolJet

  • Open source
  • Similar to Retool for internal apps
  • Supports self-hosting
  • Good for teams that want flexibility and customization

• Budibase

  • Open source
  • Great for internal workflows and forms
  • Fast to prototype
  • Good for simple business apps and approvals

• Superblocks

  • Enterprise-focused
  • Strong for internal apps with workflow automation
  • Good governance and permissions
  • Better suited for larger orgs

• UI Bakery

  • Visual builder for internal tools
  • Good for dashboards and admin interfaces
  • Integrates with APIs and databases
  • Easier learning curve for some teams

Automation/workflow-centric tools

If your “internal tool” is more process automation than UI, these can work well.

• n8n

  • Open source workflow automation
  • Great for backend automations and integrations
  • Can pair with a simple UI tool
  • Better for automations than full app building

• Pipedream

  • Good for API workflows and event-driven automations
  • Developer-friendly
  • Less of a full internal app platform, more automation/integration

• Zapier Interfaces / Zapier

  • Good for lightweight internal forms and workflows
  • Fast to use, but can get expensive and less flexible at scale

More “app platform” / custom app options

If you’re open to building more custom software instead of using a Retool-like builder.

• Next.js + Supabase/Firebase

  • Full flexibility
  • Better for polished custom tools
  • Requires engineering effort
  • Good if the app may become customer-facing later

• AppSheet

  • Google ecosystem-friendly
  • Good for simple internal mobile/web apps
  • Strong for non-technical teams
  • Less flexible than Retool

• Glide

  • Fast no-code app builder
  • Great for simple internal portals
  • Best for straightforward data-driven apps

Things to compare when choosing

A good Retool alternative depends on:

• Self-hosting vs cloud
• Open source vs proprietary
• Ease of building UIs
• Database/API integrations
• Permissions and role-based access
• Automation/workflows
• Enterprise security/compliance
• Pricing at scale

Quick recommendations

• Best open-source Retool alternative: Appsmith or ToolJet
• Best for workflows/automation: n8n
• Best enterprise option: Superblocks
• Best for non-technical teams: Glide or AppSheet
• Best if you want maximum flexibility: custom app with Next.js + backend

If you want, I can also give you:

1. a comparison table,
2. best alternatives by use case (admin dashboards, CRUD apps, workflow tools, etc.), or
3. which one is best for self-hosting.