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Sitebulb vs Screaming Frog SEO Spider: catalog facts
Sitebulb	Screaming Frog SEO Spider
Paid Paid subscription with a free trial.	Freemium Free for crawls up to 500 URLs; a licence costs £199 per year.
Web	Windows, macOS, Linux
Prioritised hints with built-in explanations JavaScript crawling included	Runs locally as a desktop app on all three major systems Checks over 300 issues including redirects and duplicates
Paid after the trial Desktop crawls capped at 500,000 URLs per audit	Free version limited to 500 URLs Advanced features need a paid yearly licence
Downloadable app, Hosted service	Downloadable app
Closed source	Closed source
License not stated	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 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.