DA and DR: two scores, two logics
Domain Authority and Domain Rating answer the same question — how strong is this domain? — but with two different philosophies. Neither belongs to Google. They are inventions of tool vendors, designed to give a quick benchmark.
Ahrefs' Domain Rating (DR) is the easiest to understand: it measures the power of the backlink profile, full stop. The more links a domain receives from sites that are themselves powerful, the higher its DR climbs. It is a link metric, and nothing else.
Moz's Domain Authority (DA) is more ambitious. It aggregates dozens of link-related signals, then runs them through a model trained to predict the probability of ranking well in Google. DA therefore attempts to answer "will this domain rank?", not just "does this domain have links?".
This nuance changes everything in how you read them. DR is descriptive. DA is predictive — and therefore more exposed to model errors.
How each metric is calculated
Both scores rest on a logarithmic scale from 0 to 100. Going from 20 to 30 takes far less effort than going from 70 to 80. This logarithmic nature explains why the first points climb quickly, and then why everything stalls.
Ahrefs' DR relies on the volume and, above all, the quality of unique referring domains. A link from a high-DR site transmits more value, and that value is distributed across the pages that site points to. Understanding the mechanics of inbound links is essential here: for that, start with what a backlink really is before interpreting a score.
Moz's DA starts from a distinct link index (Moz's own, smaller than Ahrefs') and adds a machine learning model that is regularly recalibrated against real search results. The direct consequence: your DA can move without a single link changing, simply because Moz has retrained its algorithm.
| Criterion | Domain Rating (Ahrefs) | Domain Authority (Moz) |
|---|---|---|
| What is measured | Link profile power | Probability of ranking well |
| Nature of the score | Descriptive | Predictive (ML model) |
| Scale | 0–100 logarithmic | 0–100 logarithmic |
| Index source | Ahrefs index (very large) | Moz index (more limited) |
| Stability | Moves with links | Can move without a new link |
Remember the practical consequence: comparing one site's DA to another's DR makes no sense. The two scales do not measure the same thing and are not calibrated the same way.
The limits nobody tells you about
These scores have three structural flaws that link sellers prefer to keep quiet.
First limit: they are manipulable. An artificial link profile — site networks, mass purchases, injected links — can inflate a DR or DA with no real value. A DR 60 site can be a house of cards. Conversely, a healthy site can suffer a polluted profile: that is where you need to know how to identify and handle toxic backlinks before they skew both your reading and your search ranking.
Second limit: they ignore topical relevance. A link from a large general-interest media outlet raises the score, even if it has nothing to do with your sector. Yet Google values semantic coherence between linked sites. The score does not see it.
Third limit: they measure neither traffic nor conversions. A DA 70 with no visitors is worth nothing commercially. The score is a proxy for link notoriety, not a business performance indicator.
According to an Ahrefs analysis of 200,000 domains (Dec. 2025), Domain Rating correlates only weakly with citations in AI answers. Off-site brand mentions carry far more weight.
The lesson is clear: optimizing to push up a number in a dashboard means mistaking the thermometer for the fever. The score is a consequence, never an objective.
What you should really track in 2026
Stop aiming for a DR. Track what produces revenue and lasting visibility. The landscape has shifted: more than 50% of Google queries now trigger an AI Overview, and ChatGPT exceeds 900 million weekly users. Your metrics must follow that shift.
Here are the truly actionable signals, in order of priority.
The number of sessions coming from search, segmented by intent. It is the only link-related metric that converts into customers.
Not the raw number of backlinks, but the number of topically coherent domains that cite you. Quality beats volume.
Your position on commercial-intent keywords, not the overall average. 92% of AI Overview citations come from the top 10, but 47% of positions 5–10 are mobilized: aiming for the top 10 remains decisive.
Unlinked citations on Reddit, YouTube, Wikipedia and specialized forums. These are the ones that correlate most with citations in ChatGPT and AI Overviews.
The ability of your content to be reused as-is by an LLM: self-contained passages of 134 to 167 words, static HTML in SSR (LLMs do not execute JavaScript), FAQPage schema in place.
This last point is often ignored. Only 11% of domains are cited by both ChatGPT and AI Overviews: AI visibility is still a lightly contested arena, and it is not won with a high DR. It is won with structured content and brand mentions. This is exactly the job of an SEO agency that thinks of links, content and AI citability as a single system.
A 4-step reading method
Here is how to make use of DA and DR without falling into the trap of the all-powerful number. A simple method, applicable starting today.
1. Use the scores in comparison, never in absolute terms
A DR 45 means nothing on its own. Compared to the DR 30 to 70 of your competitors on a given query, it becomes usable information. Always stay within the same tool to compare.
2. Cross-reference the score with relevance and traffic
Before accepting a link on the strength of its DR, check the site's topic, its real organic traffic and the quality of its pages. A high DR on an off-topic site is worth less than an average DR perfectly aligned.
3. Monitor trends, not point-in-time values
The evolution of your DR over six months is more telling than a snapshot at a single moment. A sudden drop may signal a loss of links or a recalibration of the tool — check the cause before panicking.
4. Make the score a secondary indicator
Place qualified traffic, business positions and brand mentions at the center of your dashboard. DA and DR come in support, to add context, never to steer.
To structure your link profile and your AI citability without drowning in misleading metrics, start from a concrete foundation: our 40-point Checklist covers the signals that truly matter, from relevant backlinks to citable passages.
Get a free GEO audit: we measure what truly drives your visibility, in Google as well as in AI engines.
Questions fréquentes
Is Domain Authority a Google ranking factor?+
No. DA is a proprietary score published by Moz, not by Google. Google has confirmed several times that it does not use any overall domain authority score. DA remains useful for comparing sites against one another, but it has no direct bearing on your position in the results.
Should you favor Ahrefs' DR or Moz's DA?+
It depends on the use case. Ahrefs' DR more faithfully reflects the raw power of the link profile. Moz's DA incorporates more ranking signals. To evaluate backlink opportunities, DR is more readable. For a view correlated with ranking, DA can complement the analysis.
Does a high DR or DA guarantee a good ranking?+
No. A high score indicates a strong link profile, but ranking depends on page relevance, search intent, content and user experience. Sites with a modest DR regularly outrank DR 80 sites on precise, well-targeted queries.
Do these scores mean anything for visibility in ChatGPT or AI Overviews?+
Very little. An Ahrefs analysis of 200,000 domains (Dec. 2025) shows that Domain Rating correlates only weakly (0.266) with AI citations, far behind off-site brand mentions. For visibility in AI engines, DA and DR are secondary indicators.
