Ahrefs Acquires Detailed: What It Means for 450k Detailed SEO Extension Users

Key Details

The acquisition covers the Detailed website, the browser extension, and related domains. Financial terms were not disclosed.

• Glen Allsopp is joining Ahrefs to work on marketing, research, and product.
• All current Detailed SEO Extension functionality remains free, according to Allsopp.
• There are no current plans for paid tiers. If premium capabilities are added, existing features will stay free.
• The extension will keep the Detailed SEO Extension name.
• Detailed will operate as "Detailed, an Ahrefs brand".
• Users do not need to take any action for updates.
• Updates will continue through existing Chrome and Firefox listings.
• The Chrome version reports over 450,000 weekly users.
• The Firefox version reports about 7,000 weekly users.

What the Extension Does

The Detailed SEO Extension aggregates page-level data to speed up audits and competitive reviews, displaying key elements in one panel to reduce manual checks.

• Surface title and meta tags, headings, robots directives, and schema markup.
• Highlight nofollow links and inspect hreflang.
• View status codes and extract People Also Ask results.
• Switch the user agent to Googlebot for quick checks.
• Open the current URL in other research tools.

Background

Detailed.com launched in 2020 and publishes SEO research and practitioner guides. Over the past year, it recorded 970,000 unique visitors.

The brand is known for long-form SEO research, including analyses of company-owned networks of ranking sites, and will continue under Ahrefs. Allsopp said he aims to help companies reach their audiences and has used Ahrefs tools in his own business for years.

Sources

Information in this report comes from official company communications and direct statements:

• Ahrefs public announcement of the Detailed acquisition, September 2025.
• Statements from Glen Allsopp regarding branding and access.
• Chrome Web Store and Mozilla Add-ons listings for user counts.