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Semrush Site Audit vs Screaming Frog SEO Spider: catalog facts
Semrush Site Audit	Screaming Frog SEO Spider
Freemium A limited free crawl is available; larger audits require a paid Semrush plan.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Web	Windows, macOS, Linux
Issues ranked by severity with fix suggestions Covers AI search visibility as well as classic SEO	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
The free crawl is limited Full use requires a paid Semrush subscription	Free version limited to 500 URLs Advanced features need a paid yearly licence
Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	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.