Domain Authority vs Domain Rating: Which One Should You Trust?

If you've spent more than five minutes in SEO, you've heard people throw around "DA" and "DR" like they're interchangeable. "This site has DA 50!" "I need links from DR 60+ sites!" They sound similar, they're both scored 1-100, and they both claim to measure website authority.

But they're built by different companies, use different data, and measure fundamentally different things. Treating them as the same number is a mistake that costs people money — especially when buying backlinks.

Domain Authority (DA) — By Moz

Domain Authority is Moz's metric. It predicts how likely a domain is to rank in Google search results. The score goes from 1 to 100, with higher numbers meaning a better chance of ranking.

What DA considers:

• The number and quality of backlinks pointing to the domain (using Moz's own link index)
• The number of linking root domains (unique sites linking to you)
• A machine learning model trained against actual Google search results

DA is a comparative metric. It's not a score Google uses — Google doesn't look at your Moz DA when deciding where to rank you. It's a prediction tool that says, roughly, "sites with this DA tend to rank at this level."

Domain Rating (DR) — By Ahrefs

Domain Rating is Ahrefs' metric. It measures the strength of a website's backlink profile. Also scored 1 to 100.

What DR considers:

• The number of unique domains linking to the site (using Ahrefs' own link index, which is larger than Moz's)
• The DR of those linking domains (high-DR sites passing more value)
• The number of sites each linking domain links to (a site that links to millions of sites passes less value per link)

The critical difference: DR only looks at backlinks. It doesn't consider content, traffic, or how well the site actually ranks. A site could have DR 70 from spammy links and still rank for nothing.

Where They Disagree

You'll frequently see sites where DA and DR give very different scores. A site might have DA 35 but DR 60, or DA 55 but DR 20. This happens because:

• Different link databases. Ahrefs crawls more of the web than Moz. A site might have links that Ahrefs found but Moz hasn't.
• Different calculations. DA factors in ranking probability using machine learning. DR is purely about backlink quantity and quality.
• Spam sensitivity. DR is easier to inflate with cheap links because it only measures link profiles. DA's machine learning component can sometimes detect when links aren't translating into actual ranking ability.

Which One Is More Reliable?

For evaluating whether a site you're getting a link from is worth anything, neither is perfect. But here's a practical guide:

Use DA when: You want a rough prediction of ranking ability. DA 40+ sites generally rank for at least some keywords and have real traffic. It's better at filtering out link farms that have inflated their DR.

Use DR when: You want to assess the backlink strength of a page. DR is better at showing the raw power of a link profile. It's also more responsive to recent link building — DA updates less frequently.

Use both when: Buying backlinks. If a site has DR 60 but DA 15, that's suspicious — it probably inflated its backlinks but doesn't rank for anything. If DA and DR are within 10-15 points of each other, the site is likely legitimate.

The Metric Backlink Sellers Love to Abuse

Here's something the backlink industry doesn't talk about openly: DR is easier to manipulate than DA. A new site can reach DR 40+ in 2-3 months by building thousands of automated links from other sites. It looks impressive on paper but means nothing for ranking.

When a seller says "links from DR 50+ sites," ask to see the sites. Check if they actually rank for any keywords. Check their traffic in Ahrefs. A DR 50 site with zero organic traffic is essentially worthless as a link source — you're paying for a number, not actual authority.

DA is harder to manipulate because Moz's machine learning component checks whether the backlink profile correlates with actual ranking performance. Sites with inflated link profiles but no rankings tend to get lower DA scores.

What Google Actually Cares About

Here's the thing: Google uses neither DA nor DR. These are third-party metrics. Google has its own internal scoring systems (PageRank was the original one, and they use more sophisticated versions now) that are not public.

The best proxy for whether a site is truly authoritative is organic traffic. A site that ranks for real keywords and gets real visitors from Google has genuine authority in Google's eyes, regardless of what its DA or DR says. When evaluating link opportunities, check the organic traffic estimate alongside DA/DR.

Bottom Line

DA and DR are useful directional indicators, not definitive measures. Use them together, cross-reference with traffic data, and don't get fooled by high numbers alone. A backlink from a DA 25 blog with real traffic in your niche is worth more than 50 links from DR 60 sites that nobody visits.

You can check any site's basic metrics using our free tools — the Meta Tag Analyzer and Domain Age Checker give you quick signals about whether a site is worth your attention.