Crab
6.3#12 in website audit softwareFree planFree planLinuxmacOSWindows
VisitCrab vs Screaming Frog SEO Spider
Screaming Frog SEO Spider
8.6#5 in seo toolsFree planFree planAPILinuxmacOSSelf-hosted
VisitWhat both publish
| Fact | Crab | Screaming Frog SEO Spider |
|---|---|---|
| Accessibility | Crab checks items including image alt text, form labels, and heading hierarchy, then assigns each page an accessibility score from 0 to 100. | The tool uses the open-source axe accessibility rule set for automated checks against Web Content Accessibility Guidelines. |
| Free plan | Yes | Yes |
| Integrations | The maker's comparison page lists Google Analytics, Search Console, PageSpeed Insights, and other integrations as “Soon.” | It connects to Google Analytics, Search Console, and PageSpeed Insights APIs, and lists link metrics integrations for Majestic, Ahrefs, and Moz APIs. |
| JavaScript rendering | Crab can render JavaScript sites with headless Chrome, including React, Vue, and other single-page applications. | Integrated headless Chromium renders JavaScript sites and frameworks including Angular, React and Vue. |
Crab plans
- FreeFree
Screaming Frog SEO Spider plans
- FreeFree
- Paid licence—
- Free VersionFree
- Paid licence (20+)$235 a year
- Paid licence (10–19)$249 a year
- Paid licence (5–9)$265 a year
Pick Crab if…
Crab suits site owners and SEO practitioners who want desktop crawls, including JavaScript rendering, site-structure mapping, and accessibility checks. Its terms ask users to crawl only sites they own or have permission to crawl.
Pick Screaming Frog SEO Spider if…
It is aimed at experienced SEOs and may suit agencies, brands and site owners conducting technical audits. JavaScript-heavy sites may benefit from its page rendering and framework support.