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Xenu's Link Sleuth vs Screaming Frog SEO Spider: catalog facts
Xenu's Link Sleuth	Screaming Frog SEO Spider
Free Free to download and use.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Windows	Windows, macOS, Linux
Checks links, images, scripts and style sheets Re-checks failures and reports redirects	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
Windows only, with no plans for other platforms Dated interface and limited development	Free version limited to 500 URLs Advanced features need a paid yearly licence
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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