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LinkChecker vs Ahrefs Broken Link Checker: catalog facts
LinkChecker	Ahrefs Broken Link Checker
Free Free and open source under the GPL.	Free The checker is free; it is a lead-in to Ahrefs' paid SEO platform.
Windows, macOS, Linux, Command line	Web
Recursive, multithreaded crawling of whole sites Many output formats including CSV, XML, SQL and sitemap graphs	No signup or download required Shows both inbound and outbound broken links
Command-line only, no graphical interface The PyPI release may lag behind the latest code	Deeper reports need a paid Ahrefs account Results depend on Ahrefs' index rather than a fresh crawl of your site
Downloadable app	Web application
Open source	Closed source
License: GPL	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 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.