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Screaming Frog SEO Spider vs Siteliner: catalog facts
Screaming Frog SEO Spider	Siteliner
Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.	Free Free scans are available from the website; account sign-up is optional.
Windows, macOS, Linux	Web
Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates	Finds duplicate content within a site Reports broken links and redirections in the same scan
Free version limited to 500 URLs Advanced features need a paid yearly licence	Web service only, so the site must be publicly reachable Focuses on content and links rather than speed or accessibility
Downloadable app	Web application
Closed 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 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.