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SEOnaut vs Screaming Frog SEO Spider: catalog facts
SEOnaut	Screaming Frog SEO Spider
Free Free and open source with no paid tier.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Web, Self-hosted	Windows, macOS, Linux
Self-hosted, so crawl data stays on your server Docker Compose setup	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
Focused on technical audits, with no keyword or backlink data Requires running and maintaining your own server	Free version limited to 500 URLs Advanced features need a paid yearly licence
Self-hosted	Downloadable app
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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