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