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