This AI generated image shows a scale with "domain authority" on one side and "authority score" on the other and was created to accompany a blog post whose title is "Are domain authority and authority score the same?".
This entry is part 31 of 44 in the series Topical Authority

The lead post in this series is Mastering Topical Authority: A Comprehensive Guide to Boost Your SEO.


The short answer is no, they’re not, but they’re related, sort of.

But for that answer to be meaningful, it’s necessary to review the concepts, similarities, and differences, for both domain authority and authority score.

Domain authority

This is a proprietary metric created by Moz in the early days of SEO and is reported by their SEO reporting tool Link Explorer.

Authority score

This is also a proprietary metric. This one was created by SEMrush and is reported by their SEO reporting tool which is also named Link Explorer.


Both metrics are are intended to predict how likely pages from a target site are likely to appear in search metrics, and how valuable a backlink from the site is likely to be.


Domain authority is calculated primarily from number of unique linking root domains (.com, .gov, .edu, .uk, etc), and the total number of links.

Authority score is based on a sites backlink profile as well as the estimated monthly traffic levels, and a site’s “spam factor” which is a measure of how much of that is the result of “manipulation”.

In closing

They’re not the same, but they are used in similar ways, and many people do in fact consider them to be “equivalent enough”.

Series Navigation<< Is domain authority important?How do you increase topical authority? >>

Kevin Carney
Kevin Carney

Kevin "fell into" SEO by accident, like many others. The SaaS platform to help writers boost their topical authority came years later after various SEOs said it was something they would like to see.

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