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SEOquake vs Detailed SEO Extension: catalog facts
SEOquake	Detailed SEO Extension
Free The extension is a free download; the linked web checker allows three free checks a day.	Free Free, with no paid tier according to the developer.
Web, Browser extension	Browser extension
On-page SEO audit directly in the browser Internal link inspection and URL comparison	Heading structure shown at a glance Checks X-Robots headers as well as meta tags
Homepage now redirects to a Backlinko page that promotes Semrush Deeper site-wide audits are pushed toward paid Semrush tools	Closed source Page-level insights only, not a full site crawl
Web application, Browser extension	Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
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.