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Sitechecker Broken Link Checker vs W3C Link Checker: catalog facts
Sitechecker Broken Link Checker	W3C Link Checker
Freemium Free checks are available; the full platform and ongoing monitoring are paid.	Free Free to use on the W3C website.
Web, Browser extension	Web
Broken links reported alongside a wider technical SEO audit Companion Chrome extension	Checks anchors as well as full URLs Recursive crawling with a configurable depth
Heavily oriented toward selling the paid SEO platform More than needed if you only want a link check	Plain interface with a text-heavy report Works best when the pages already have valid markup
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
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.