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Retool alternatives · App Builders

Open-source alternatives to Retool

Retool is not described as open source on its own site. 6 of the 89 other AI app builders in this directory are open source, according to their own sites.

Retool has a free plan. Paid plans start at $10 per builder / month, billed annually (plus $5 per internal user). All of them are free or have a free plan.

6 tools · Listings checked up to Nov 13, 2026 · Where the facts come from

How each one differs from Retool

  1. Appsmith

    Open-source low-code platform for internal apps

    • Appsmith starts at $15 per user / month. Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • Appsmith is open source, according to its own site.
    • Retool also covers workflow automation, AI agents and no-code.
    Appsmith vs RetoolAppsmith pricing and details

  2. Budibase

    Open-source platform for internal apps, automations and AI agents

    • Budibase starts at $299 per month and up (Budibase Cloud, billing basis not shown). Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • Budibase is open source, according to its own site.
    Budibase vs RetoolBudibase pricing and details

  3. ToolJet

    Low-code platform for internal tools, workflows and AI agents

    • ToolJet starts at $23 per builder / month, billed annually ($29 billed monthly). Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • ToolJet is open source, according to its own site.
    • ToolJet also covers databases.
    ToolJet vs RetoolToolJet pricing and details

  4. Dyad

    Open-source desktop app that builds web apps with AI, locally

    • Dyad starts at $20 per month (Dyad Pro). Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • Only Dyad lists macOS, Windows and Linux apps.
    • Only Retool lists a web app.
    • Dyad is open source, according to its own site.
    Dyad pricing and details

  5. Leap

    AI agent that builds backend-heavy apps and deploys to your cloud

    • Leap starts at $30 per month for 100 credits. Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • Leap is open source, according to its own site.
    • Retool is self-hostable, according to its own site.
    • Retool also covers workflow automation and no-code.
    Leap pricing and details

  6. Mage

    Free generator that turns a description into a Wasp web app

    • Mage is free. Retool starts at $10 per builder / month, billed annually (plus $5 per internal user).
    • Mage is open source, according to its own site.
    • Retool is self-hostable, according to its own site.
    • Retool also covers workflow automation, AI agents and no-code.
    Mage pricing and details

Common questions

Is there an open-source alternative to Retool?

Yes. Appsmith, Budibase, ToolJet, Dyad, Leap and Mage are open source, according to their own sites.

Is Retool open source?

Retool is not described as open source on its own site. The listing was checked on Nov 12, 2026 against the pages it cites.

When was this checked?

Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.

This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Retool: the alternatives its listing names first, then the tools that share the most features with it.