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Semrush Site Audit vs SEOnaut: catalog facts
Semrush Site Audit	SEOnaut
Freemium A limited free crawl is available; larger audits require a paid Semrush plan.	Free Free and open source with no paid tier.
Web	Web, Self-hosted
Issues ranked by severity with fix suggestions Covers AI search visibility as well as classic SEO	Self-hosted, so crawl data stays on your server Docker Compose setup
The free crawl is limited Full use requires a paid Semrush subscription	Focused on technical audits, with no keyword or backlink data Requires running and maintaining your own server
Web application	Self-hosted
Closed source	Open source
License not stated	License: MIT
Not stated if an account is needed	Not stated if an account is 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 October 2, 2026

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