Technorati Authority FAQ

What is Technorati Authority?

  • Technorati Authority measures a site's standing & influence in the blogosphere. With the October 2009 redesign of, we’ve changed the Technorati Authority calculations to better reflect the continually changing attention of the blogosphere.
  • We have also added a new measure of Technorati Authority, which is topical by content category, i.e., technology, movies, automotive, etc.

How is Technorati Authority calculated?

  • Authority is calculated based on a site’s linking behavior, categorization and other associated data over a short, finite period of time. A site’s authority may rapidly rise and fall depending on what the blogosphere is discussing at the moment, and how often a site produces content being referenced by other sites.
  • The new Authority calculation differs from the past version, which measured linking behavior over a longer 6 month timeframe. Please note that links in blogrolls don’t count towards Authority, as they are not indicative of interest in relevant content; we stopped including blogroll links in August 2008.
  • Authority is on a scale of 0-1000. 1000 is the highest possible authority.

How does topical Technorati Authority work?

  • Topical Authority measures a blog’s influence within its subject category.
  • Blogs will appear ranked by topical authority within Technorati’s blog directory.
  • Factors include linking behavior from blogs and posts in the same category, how well a blog's overall content matches the category in question, and other associated data.
  • It’s possible for a blog to have authority in several different categories. The authority in each category may be different.

What is Technorati Rank?

  • Technorati Rank is a site's rank among the Technorati Authority of all sites. 1 is the highest rank.
  • We also determine topical ranks within categories, based on the topical Technorati Authority.
  • As sites' Technorati Authority changes over time, ranks will also change. You can see the top-ranked sites in the overall Blogosphere at Technorati Top100 and the top sites in each category in the Blog Directory.

Also see Technorati's Support Page