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SEOTesting alternatives · Technical SEO

Open-source alternatives to SEOTesting

SEOTesting 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.

SEOTesting is a paid product with a free trial, starting at $50 per month for 1 website, billed monthly. 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 SEOTesting

  1. Yellow Lab Tools

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

    • Yellow Lab Tools is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • Yellow Lab Tools has a free plan. SEOTesting does not, though it has a free trial.
    • Only Yellow Lab Tools lists macOS and Linux apps.
    • Only SEOTesting lists a browser extension.
    Yellow Lab Tools pricing and details

  2. LibreCrawl

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

    • LibreCrawl is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • LibreCrawl has a free plan. SEOTesting does not, though it has a free trial.
    • Only LibreCrawl lists Windows, macOS and Linux apps.
    • Only SEOTesting lists a browser extension.
    LibreCrawl pricing and details

  3. squirrelscan

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

    • squirrelscan starts at $19 per month, billed monthly. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • squirrelscan has a free plan. SEOTesting does not, though it has a free trial.
    • Only squirrelscan lists macOS, Windows and Linux apps.
    • Only SEOTesting lists a browser extension.
    squirrelscan pricing and details

  4. sitespeed.io

    Free open-source toolkit for testing and monitoring web performance

    • sitespeed.io is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • sitespeed.io has a free plan. SEOTesting does not, though it has a free trial.
    • Only sitespeed.io lists macOS, Windows and Linux apps.
    • Only SEOTesting lists a web app.
    sitespeed.io pricing and details

  5. Unlighthouse

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

    • Unlighthouse is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • Unlighthouse has a free plan. SEOTesting does not, though it has a free trial.
    • Only Unlighthouse lists macOS, Windows and Linux apps.
    • Only SEOTesting lists a web app.
    Unlighthouse pricing and details

  6. Lighthouse

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

    • Lighthouse is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • Lighthouse has a free plan. SEOTesting does not, though it has a free trial.
    • Lighthouse is open source, according to its own site.
    • Lighthouse also covers site audit and page speed.
    Lighthouse pricing and details

  7. SiteOne Crawler

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

    • SiteOne Crawler is free. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • SiteOne Crawler has a free plan. SEOTesting does not, though it has a free trial.
    • Only SiteOne Crawler lists macOS, Windows and Linux apps.
    • Only SEOTesting lists a web app.
    SiteOne Crawler pricing and details

  8. SEOnaut

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

    • SEOnaut starts at $9 per month, billed monthly. SEOTesting starts at $50 per month for 1 website, billed monthly.
    • SEOnaut has a free plan. SEOTesting does not, though it has a free trial.
    • Only SEOTesting lists a browser extension.
    • SEOnaut is open source and self-hostable, according to its own site.
    SEOnaut pricing and details

Common questions

Is there an open-source alternative to SEOTesting?

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

Is SEOTesting open source?

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