Compare software

Screaming Frog SEO Spider vs Seodisias: catalog facts
Screaming Frog SEO Spider	Seodisias
Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.	Free The developer says the core crawler and analysis features are free.
Windows, macOS, Linux	Windows, macOS, Linux
Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates	Checks for more than 30 technical issues Can render JavaScript-heavy pages
Free version limited to 500 URLs Advanced features need a paid yearly licence	Windows and Linux builds are not code-signed
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	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 October 8, 2026

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