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Builder.io alternatives · App Builders

Open-source alternatives to Builder.io

Builder.io 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.

Builder.io has a free plan. Paid plans start at $24 per user / month, billing basis not shown. 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 Builder.io

  1. Dyad

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

    • Dyad starts at $20 per month (Dyad Pro). Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Dyad lists macOS, Windows and Linux apps.
    • Only Builder.io lists a web app.
    • Only Builder.io lists a browser extension.
    Dyad pricing and details

  2. Leap

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

    • Leap starts at $30 per month for 100 credits. Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Builder.io lists a browser extension.
    • Leap is open source, according to its own site.
    Leap pricing and details

  3. Appsmith

    Open-source low-code platform for internal apps

    • Appsmith starts at $15 per user / month. Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Builder.io lists a browser extension.
    • Appsmith is open source and self-hostable, according to its own site.
    • Builder.io also covers AI agents.
    Appsmith pricing and details

  4. 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). Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Builder.io lists a browser extension.
    • Budibase is open source and self-hostable, according to its own site.
    • Budibase also covers workflow automation and no-code.
    Budibase pricing and details

  5. ToolJet

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

    • ToolJet starts at $23 per builder / month, billed annually ($29 billed monthly). Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Builder.io lists a browser extension.
    • ToolJet is open source and self-hostable, according to its own site.
    • ToolJet also covers databases, workflow automation and no-code.
    ToolJet pricing and details

  6. Mage

    Free generator that turns a description into a Wasp web app

    • Mage is free. Builder.io starts at $24 per user / month, billing basis not shown.
    • Only Builder.io lists a browser extension.
    • Mage is open source, according to its own site.
    • Builder.io also covers AI agents.
    Mage pricing and details

Common questions

Is there an open-source alternative to Builder.io?

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

Is Builder.io open source?

Builder.io 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 Builder.io: the alternatives its listing names first, then the tools that share the most features with it.