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Integrity vs W3C Link Checker: catalog facts
Integrity	W3C Link Checker
Freemium Integrity is free; Integrity Plus ($20), Integrity Pro ($59) and Scrutiny ($149) are paid…	Free Free to use on the W3C website.
macOS	Web
Free link checker with no usage cap mentioned Native macOS app	Checks anchors as well as full URLs Recursive crawling with a configurable depth
Mac only Export, search and sitemaps require a paid version	Plain interface with a text-heavy report Works best when the pages already have valid markup
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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