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Screaming Frog SEO Spider vs SortSite: catalog facts
Screaming Frog SEO Spider	SortSite
Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.	Freemium The online demo is free for 10 pages; SortSite Desktop and OnDemand are paid.
Windows, macOS, Linux	Web
Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates	Accessibility, links, compatibility and SEO in one scan Over 1200 checkpoints
Free version limited to 500 URLs Advanced features need a paid yearly licence	Free demo covers only the first 10 pages Full site scans require a paid product
Downloadable app	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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.