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Dead Link Checker vs muffet: catalog facts
Dead Link Checker	muffet
Freemium Manual checks are free; scheduled automatic checks require a paid subscription.	Free Free and open source.
Web	Windows, macOS, Linux, Command line
Free manual checks of whole sites or single pages Can check multiple sites in one run	Fast concurrent crawling Fits easily into CI pipelines
Automated checking is paid Scheduling and multi-site reports need an account	Command line only, no graphical interface Focused on links rather than wider SEO or markup checks
Web application	Downloadable app
Closed source	Open source
License not stated	License not stated
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.