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Ahrefs Broken Link Checker vs LinkChecker: catalog facts
Ahrefs Broken Link Checker	LinkChecker
Free The checker is free; it is a lead-in to Ahrefs' paid SEO platform.	Free Free and open source under the GPL.
Web	Windows, macOS, Linux, Command line
No signup or download required Shows both inbound and outbound broken links	Recursive, multithreaded crawling of whole sites Many output formats including CSV, XML, SQL and sitemap graphs
Deeper reports need a paid Ahrefs account Results depend on Ahrefs' index rather than a fresh crawl of your site	Command-line only, no graphical interface The PyPI release may lag behind the latest code
Web application	Downloadable app
Closed source	Open source
License not stated	License: GPL
No account 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.