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Serpstat vs Semrush Site Audit: catalog facts
Serpstat	Semrush Site Audit
Freemium Free access to start, with paid plans for fuller use.	Freemium A limited free crawl is available; larger audits require a paid Semrush plan.
Web, Browser extension	Web
Site audit with prioritized issues and scheduled checks Keyword data for 230 countries	Issues ranked by severity with fix suggestions Covers AI search visibility as well as classic SEO
Hosted service; data stays on Serpstat's servers Free tier is limited compared with paid plans	The free crawl is limited Full use requires a paid Semrush subscription
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
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.