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Ahrefs Free vs Sitechecker: catalog facts
Ahrefs Free	Sitechecker
Freemium Free for verified websites; paid Ahrefs plans add more tools and data.	Freemium The single-page SEO checker is free; crawling, monitoring and rank tracking are paid…
Web, Browser extension	Web, Browser extension
Technical site audit at no cost Backlink and keyword ranking data from Ahrefs' index	Free page audit with a score, status code and indexation status Crawler, monitoring and rank tracking in the same platform
Requires an account and site ownership verification Full data for other people's sites needs a paid plan	Most features beyond the single-page checker are paid Aimed at marketers, so reports focus on SEO rather than general site health
Web application, Browser extension	Web application, Browser extension
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 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.