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SEO · head to head

Lighthouse vs Rank Math

Lighthouse logo

Lighthouse

SEO

Audit web page performance and quality

From
Free
Rated
-
Full reviewWebsite
Rank Math logo

Rank Math

SEO

WordPress SEO plugin with a free tier that undercuts Yoast on schema and feature count

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Lighthouse performance scores vary significantly due to A/B testing, device differences, browser extensions, and antivirus software affecting results; Rank Math all paid tiers are annual-only with no monthly option, so evaluating Pro or Business month to month before committing is not possible.
  • They diverge on capability: Lighthouse covers Performance scoring, Rank Math covers Free schema generator.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Lighthouse and Rank Math actually diverge.

Attributes where Lighthouse and Rank Math differ
AttributeLighthouseRank Math
Pricing modelfreeFreemium, paid tiers billed annually only
PlatformsChrome, EdgeWeb
Founded1998Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (SEO).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Lighthouse

  • Performance scoring
  • Accessibility audit
  • SEO check
  • PWA validation
  • Chrome support
  • Edge support

Only in Rank Math

  • Free schema generator
  • Rank tracker
  • AI Link Genius
  • Content AI trial
  • Multi-site management
  • 404 monitor and redirections

What people use each for

The jobs each tool is most often brought in to do.

Lighthouse

  • Performance auditing to identify page loading speed improvementsnot Rank Math
  • Accessibility compliance checking for users with disabilitiesnot Rank Math
  • SEO optimization verification for search engine compatibilitynot Rank Math
  • Security and best practices scanning for code healthnot Rank Math
  • Progressive web app validation and CI/CD pipeline integrationnot Rank Math

Rank Math

  • A WordPress site owner who wants more schema types and keyword optimisation than Yoast's free tier provides, at no costnot Lighthouse
  • An agency managing dozens of client WordPress sites that wants a per-site-count licence rather than per-site billingnot Lighthouse
  • A team that wants rank tracking built into the WordPress dashboard rather than as a separate subscriptionnot Lighthouse
  • A site migrating away from a paid competitor and wanting a free tier competitive enough to not need Pro immediatelynot Lighthouse

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Lighthouse

  • Performance scores vary significantly due to A/B testing, device differences, browser extensions, and antivirus software affecting results
  • Limited to metrics that contribute to scores; Opportunities and Diagnostics don't directly impact scoring
  • Diminishing returns above 0.96 score, making perfect 100 scores extremely challenging
  • Scores based on HTTP Archive data which may not reflect all performance scenarios

Rank Math

  • All paid tiers are annual-only with no monthly option, so evaluating Pro or Business month to month before committing is not possible.
  • The advertised price is a first-year introductory rate; renewal pricing is roughly 10 to 18 percent higher across every tier, which is easy to miss when comparing sticker prices to Yoast.
  • Switching an established WordPress site to or from Rank Math risks losing accumulated redirect rules and schema configuration if the migration is not done carefully, which discourages later switching regardless of price changes.
  • It is WordPress-only, so any team running a non-WordPress CMS gets nothing from this product at all.
  • The generous free tier depends on upselling Pro and Content AI trials inside the plugin dashboard, which some users find intrusive compared to Yoast's comparatively quieter free experience.

Pricing, plan by plan

Lighthouse

Free
  • FreeFree
    • Performance audit
    • Accessibility check
    • SEO analysis

Rank Math

Free
  • FreeFree
    • Unlimited personal websites
    • 18 schema types and unlimited keyword optimisation
    • Google Search Console integration
  • Pro$7.99/month
    • Billed annually, renews at 8.99 euros a month
    • 500 tracked keywords, 840+ schema types
    • AI Link Genius and broken link checker
  • Business$24.99/month
    • Billed annually, renews at 27.99 euros a month
    • 100 client websites, 10,000 tracked keywords
    • Daily Google data fetching, unlimited data retention
  • Agency$54.99/month
    • Billed annually, renews at 64.99 euros a month
    • 500 client websites, 50,000 tracked keywords
    • All Business features, no data preservation limits

Which should you pick?

Choose Lighthouse if

  • You need performance scoring.
  • You want to start without paying.
  • You work on Chrome, Edge.
  • You also want accessibility audit.
Lighthouse review

Choose Rank Math if

  • You need free schema generator.
  • You want to start without paying.
  • You also want rank tracker.
Rank Math review

Questions people ask

Is Lighthouse or Rank Math better?
Neither clearly leads. Lighthouse starts at Free and Rank Math at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Lighthouse or Rank Math?
Lighthouse starts at Free and Rank Math at Free.
Does Lighthouse or Rank Math run on more platforms?
Lighthouse runs on Chrome, Edge. Rank Math runs on Web.
Can I use Lighthouse for free?
Both have a free tier, so you can try either at no cost before committing.
What is Lighthouse best used for?
Lighthouse is most often used for performance auditing to identify page loading speed improvements, accessibility compliance checking for users with disabilities, seo optimization verification for search engine compatibility, security and best practices scanning for code health. Of those, performance auditing to identify page loading speed improvements and accessibility compliance checking for users with disabilities are not what Rank Math is typically brought in for.
What can Lighthouse do that Rank Math cannot?
Lighthouse covers Performance scoring, Accessibility audit, SEO check, PWA validation. Rank Math covers Free schema generator, Rank tracker, AI Link Genius, Content AI trial.

Answered from the vendors’ own pages

Lighthouse: Is Lighthouse free?

Yes. Lighthouse is completely free and open-source. It is developed by Google and integrated into Chrome DevTools, PageSpeed Insights, and available as a command-line tool. There are no licensing fees or premium tiers.

Source
Rank Math: Is Rank Math really free?

Yes, for unlimited personal websites, with 18 schema types and unlimited keyword optimisation at no cost; client sites and rank tracking require a paid tier.

Lighthouse: Can I run Lighthouse offline?

Yes. Lighthouse can run offline in multiple ways: through Chrome DevTools (built into Chrome), as a command-line tool (Node.js), or as a Node.js module integrated into your build process. You do not need an internet connection after installing the tool.

Source
Rank Math: Can I pay monthly instead of annually?

No. All paid plans are billed annually only; there is no monthly billing option.

Lighthouse: What pages can Lighthouse audit?

Lighthouse can audit any web page, including pages that require authentication. This is an advantage over some alternative tools that cannot test behind login screens. You can run audits on public pages or authenticated pages via command-line with custom headers.

Source
Rank Math: Does the advertised price stay the same at renewal?

No. Every paid tier renews at a higher rate than the first-year introductory price, by roughly 10 to 18 percent depending on the plan.

Lighthouse: Can Lighthouse prevent performance regression during development?

Yes. Lighthouse CI is available to prevent performance degradation during development cycles. You can integrate Lighthouse CI into your continuous integration pipeline to automatically audit pages on every commit and fail builds if performance metrics fall below thresholds you define.

Source
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