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Schema App alternatives · Technical SEO

Open-source alternatives to Schema App

Schema App is not described as open source on its own site. 8 of the 83 other technical SEO tools in this directory are open source, according to their own sites.

Schema App's current pricing could not be confirmed from its own site. All of them are free or have a free plan.

8 tools · Listings checked up to Oct 23, 2026 · Where the facts come from

How each one differs from Schema App

  1. sitespeed.io

    Free open-source toolkit for testing and monitoring web performance

    • sitespeed.io has a free plan. Schema App does not.
    • Only sitespeed.io lists macOS, Windows and Linux apps.
    • Only Schema App lists a web app.
    • sitespeed.io is open source and self-hostable, according to its own site.
    sitespeed.io pricing and details

  2. Unlighthouse

    Free open-source tool that runs Lighthouse on every page of a site

    • Unlighthouse has a free plan. Schema App does not.
    • Only Unlighthouse lists macOS, Windows and Linux apps.
    • Only Schema App lists a web app.
    • Unlighthouse is open source, according to its own site.
    Unlighthouse pricing and details

  3. Lighthouse

    Google's open-source audit of page speed, accessibility and SEO

    • Lighthouse has a free plan. Schema App does not.
    • Only Lighthouse lists a browser extension.
    • Lighthouse is open source, according to its own site.
    • Lighthouse also covers site audit and page speed.
    Lighthouse pricing and details

  4. Yellow Lab Tools

    Free open-source audit of a page's speed and front-end code

    • Yellow Lab Tools has a free plan. Schema App does not.
    • Only Yellow Lab Tools lists macOS and Linux apps.
    • Yellow Lab Tools is open source and self-hostable, according to its own site.
    • Yellow Lab Tools also covers page speed.
    Yellow Lab Tools pricing and details

  5. SiteOne Crawler

    Free open-source site crawler and audit report, as an app or CLI

    • SiteOne Crawler has a free plan. Schema App does not.
    • Only SiteOne Crawler lists macOS, Windows and Linux apps.
    • Only Schema App lists a web app.
    • SiteOne Crawler is open source, according to its own site.
    SiteOne Crawler pricing and details

  6. SEOnaut

    Open-source SEO site audit tool, self-hosted or in the cloud

    • SEOnaut has a free plan. Schema App does not.
    • SEOnaut is open source and self-hostable, according to its own site.
    • SEOnaut also covers site audit.
    • Schema App also covers reports, AI search visibility and schema markup.
    SEOnaut pricing and details

  7. LibreCrawl

    Free open-source SEO crawler you run in your own browser

    • LibreCrawl has a free plan. Schema App does not.
    • Only LibreCrawl lists Windows, macOS and Linux apps.
    • LibreCrawl is open source and self-hostable, according to its own site.
    • LibreCrawl also covers site audit.
    LibreCrawl pricing and details

  8. squirrelscan

    Open-source site audit CLI whose fixes are written for coding agents

    • squirrelscan has a free plan. Schema App does not.
    • Only squirrelscan lists macOS, Windows and Linux apps.
    • squirrelscan is open source, according to its own site.
    • squirrelscan also covers site audit.
    squirrelscan pricing and details

Common questions

Is there an open-source alternative to Schema App?

Yes. sitespeed.io, Unlighthouse, Lighthouse, Yellow Lab Tools, SiteOne Crawler, SEOnaut, LibreCrawl and squirrelscan are open source, according to their own sites.

Is Schema App open source?

Schema App is not described as open source on its own site. The listing was checked on Oct 23, 2026 against the pages it cites.

When was this checked?

Every listing on this page was checked on Oct 23, 2026, against the pages it cites. 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 Schema App: the alternatives its listing names first, then the tools that share the most features with it.