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LinkChecker vs Screaming Frog SEO Spider: catalog facts
LinkChecker	Screaming Frog SEO Spider
Free Free and open source under the GPL.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Windows, macOS, Linux, Command line	Windows, macOS, Linux
Recursive, multithreaded crawling of whole sites Many output formats including CSV, XML, SQL and sitemap graphs	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
Command-line only, no graphical interface The PyPI release may lag behind the latest code	Free version limited to 500 URLs Advanced features need a paid yearly licence
Downloadable app	Downloadable app
Open source	Closed source
License: GPL	License not stated
No account needed	No account needed
Not stated if it works offline	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.