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Asqatasun vs SiteOne Crawler: catalog facts
Asqatasun	SiteOne Crawler
Free Free and open source.	Free Free and open source.
Self-hosted	Windows, macOS, Linux, Command line
Audits whole sites, not just single pages API for use in continuous integration	Broad audit covering SEO, security, accessibility and performance Both a desktop GUI and a scriptable CLI
Rules follow the French RGAA standard Requires running your own server	The large number of CLI options takes time to learn Crawling large sites can put load on the target server
Self-hosted	Downloadable app
Open source	Open 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 24, 2026	Official website Full listing and sources Checked September 24, 2026

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