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Sitechecker Broken Link Checker vs LinkChecker: catalog facts
Sitechecker Broken Link Checker	LinkChecker
Freemium Free checks are available; the full platform and ongoing monitoring are paid.	Free Free and open source under the GPL.
Web, Browser extension	Windows, macOS, Linux, Command line
Broken links reported alongside a wider technical SEO audit Companion Chrome extension	Recursive, multithreaded crawling of whole sites Many output formats including CSV, XML, SQL and sitemap graphs
Heavily oriented toward selling the paid SEO platform More than needed if you only want a link check	Command-line only, no graphical interface The PyPI release may lag behind the latest code
Web application, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: GPL
Not stated if an account is needed	No account needed
Needs internet	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.