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Checkbot vs Screaming Frog SEO Spider: catalog facts
Checkbot	Screaming Frog SEO Spider
Freemium Free to install, with Checkbot Pro from $10 per month.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Browser extension	Windows, macOS, Linux
Crawls hundreds of pages at once More than 50 SEO, speed and security checks	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
Chrome only Some features require a paid plan	Free version limited to 500 URLs Advanced features need a paid yearly licence
Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.