Domain Authority measured influence in search rankings. The Authority Index measures influence in AI responses. It's the definitive metric for AI visibility.
Example Authority Index display
The Authority Index is a weighted composite of five key factors that determine how influential your content is in AI responses.
How often do you appear in AI responses? We measure your presence across ChatGPT, Claude, Perplexity, and Google AI.
Are you cited as the primary source or just a supporting reference? Primary citations carry more weight.
How many related queries do you appear for? Broader coverage means stronger topical authority.
Is your presence growing, stable, or declining? Recent momentum matters for predicting future visibility.
Who are you cited alongside? Being co-cited with authoritative sources transfers credibility.
You're a leading source in AI citations for your space. AI systems consistently choose you as the authoritative reference.
Well-established presence with frequent citations. You're recognized as a trusted source in your domain.
Solid visibility with room to grow. You appear in AI responses but aren't yet the go-to source.
Building presence and gaining traction. AI systems are starting to recognize your content.
Limited AI visibility. Significant opportunity to establish authority through citation-optimized content.
For over a decade, Domain Authority was the benchmark for SEO success. Moz created a metric that everyone used to measure search influence—and it shaped how the industry thought about rankings.
But Domain Authority measures link-based authority for traditional search. As AI increasingly answers questions directly, a new metric is needed—one that measures influence in AI responses, not just search rankings.
The Authority Index fills this gap. It's built on our Citation Graph—the largest database of AI citation patterns—and provides a single, comparable metric for AI visibility.
"60% of searches now end without a click. If you're not being cited by AI, you're invisible to a growing majority of information seekers."
See where you stand in AI visibility. Track your score over time. Get actionable recommendations to improve.