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Ahrefs Free vs SEOptimer: catalog facts
Ahrefs Free	SEOptimer
Freemium Free for verified websites; paid Ahrefs plans add more tools and data.	Freemium Free single audits; white-label reports and the full toolset need a paid plan with free…
Web, Browser extension	Web
Technical site audit at no cost Backlink and keyword ranking data from Ahrefs' index	Instant audit from a single URL Prioritised, plain-language recommendations
Requires an account and site ownership verification Full data for other people's sites needs a paid plan	Report branding and deeper features are paid Scores are a summary rather than a full crawl
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 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.