Compare software

Sitechecker vs Ahrefs Free: catalog facts
Sitechecker	Ahrefs Free
Freemium The single-page SEO checker is free; crawling, monitoring and rank tracking are paid…	Freemium Free for verified websites; paid Ahrefs plans add more tools and data.
Web, Browser extension	Web, Browser extension
Free page audit with a score, status code and indexation status Crawler, monitoring and rank tracking in the same platform	Technical site audit at no cost Backlink and keyword ranking data from Ahrefs' index
Most features beyond the single-page checker are paid Aimed at marketers, so reports focus on SEO rather than general site health	Requires an account and site ownership verification Full data for other people's sites needs a paid plan
Web application, Browser extension	Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.