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

← All guides · 11 min read · Published July 2026

TL;DR:

• DR (Ahrefs) scores backlink strength only; DA (Moz) predicts ranking likelihood via a machine-learning model.
• The same site shows different DR and DA numbers because each tool has its own crawler, index, formula, and update cycle.
• Neither metric is a Google ranking factor.
• The link building industry has standardized on DR; DA is mainly useful inside the Moz ecosystem.
• Both scores can be inflated by links Google ignores — always pair the score with organic traffic before paying for a link.

People quote DR and DA as if they were the same number. They aren't. The same site can show DR 62 and DA 38 on the same day, and both tools are "right" by their own definitions. Here's how each works, why they diverge, and why neither should be the only thing you check before paying for a link.

What is Domain Rating (DR)?

DR is a pure backlink metric. Ahrefs calculates it from its own crawl of the web, and the score reflects roughly three things:

• How many unique websites link to the domain — referring domains, not raw backlink counts. A thousand links from one site count far less than links from a hundred different sites.
• The DR of those linking sites — links from strong domains pass more weight than links from weak ones, so the calculation is recursive.
• How many other sites each linker points to — a domain's "voting power" is split across everything it links out to. A followed link from a site that links to 50 domains passes more equity than one from a site linking to 5,000.

The scale is logarithmic. Climbing from DR 10 to DR 20 takes a modest amount of link growth; climbing from DR 70 to DR 80 takes a very large one. That's why new sites move fast early and then plateau.

Just as important is what DR ignores: traffic, content quality, keyword rankings, domain age, and spam signals. It is a links-only calculation, by design — which makes it transparent (you can open the referring domains report and see exactly what's driving the score) but also easier to inflate with manufactured links. We've covered the metric in more depth in our guide to what Domain Rating is, including realistic benchmarks by site age.

What is Domain Authority (DA)?

DA takes a different approach. Instead of scoring the backlink profile directly, Moz uses a machine-learning model that predicts how often a domain should appear in Google's search results relative to other domains. Link data from Moz's index — linking root domains, total links, and Moz's own link-quality signals — feeds the model, but the output is a ranking prediction, not a link-strength score.

Two practical consequences follow from that design:

1. DA is explicitly comparative. Moz recalibrates the model against real search results, so your DA can drop even when you did nothing wrong — the sites you're being compared against simply gained ground, or the model was retrained.
2. DA is harder to reverse-engineer. Because it runs through a machine-learning layer with dozens of inputs rather than a direct formula, you can't cleanly attribute a DA change to a specific batch of links the way you often can with DR.

Moz also publishes a separate Spam Score, and its Domain Authority documentation is upfront that DA is a comparative tool, not a grade Google assigns.

What's the difference between Domain Rating and Domain Authority?

The short version: DR measures how strong a site's backlink profile is; DA estimates how likely the site is to rank. Everything else follows from that split.

Other tools publish equivalents — Semrush's Authority Score, Majestic's Trust Flow. Same idea, same caveat: each is a proprietary estimate from a proprietary index, and none transfer across tools.

Why does the same site get different DR and DA scores?

When a client asks why their site is DR 55 but DA 32, the answer is almost always some combination of these four factors:

Different crawlers, different indexes. Ahrefs and Moz each run their own crawler and link database — both huge, neither a complete map of the web, and they don't overlap perfectly. A chunk of your backlinks may exist in one index and not the other.

Different formulas. DR is a recursive link-equity calculation. DA is a machine-learning prediction trained against SERPs. They aren't computing the same thing, so there's no reason the outputs should match.

Different scaling curves. Both are 0–100 and logarithmic, but the curves aren't calibrated to each other. DR 50 and DA 50 are not equivalent milestones.

Different update cycles. The scores refresh on different schedules, so one tool may have already counted links the other hasn't crawled yet.

The mistake to avoid: comparing your DR against a competitor's DA. Cross-tool comparisons are meaningless. Pick one tool and compare within it.

Is DR or DA a Google ranking factor?

No. Google does not use Domain Rating or Domain Authority. Google's representatives have repeatedly said there is no single site-wide "authority score" in the ranking systems that works the way these third-party numbers do. DR and DA are estimates made by SEO software companies looking at the web from the outside.

That doesn't make them useless — the scores correlate reasonably well with ranking ability in aggregate, because strong backlink profiles influence both the scores and the rankings. But correlation at the population level tells you little about one specific site. A domain can carry a high DR earned from a link scheme, an expired-domain rebuild, or a PBN network, and Google may have already discounted every one of those links. The score stays high; the ranking power doesn't.

What is a good DR or DA score?

There's no universal "good" number — both scales are relative, and what's strong in one niche is average in another. That said, these are the working conventions most SEOs use:

Two cautions. First, benchmark against your actual SERP competitors, not the global scale — a DR 35 site can dominate a local niche where every competitor sits at DR 20. Second, a score band says nothing about whether the links behind it are real; in our vetting work we regularly see DR 60+ domains built mostly on links Google has long since discounted.

How do you check DR and DA?

You don't need a paid subscription to see the headline numbers:

• DR: Ahrefs' free Website Authority Checker returns any domain's DR plus a snapshot of its backlink profile.
• DA: Moz's free Domain SEO Analysis tool (part of Link Explorer) shows DA, linking root domains, and Moz's Spam Score after a free account signup.

The free views are fine for a quick read. For actual link vetting you need the data behind the score — referring domains, organic keywords, traffic history — because the headline number is exactly what score-inflation schemes are built to game. Our guide to checking backlink quality walks through that inspection.

How do you increase DR and DA?

Both scores respond to the same input — followed links from more unique, stronger referring domains. There is no separate "DR strategy" and "DA strategy." What moves the needle:

1. Earn links from new referring domains. Both metrics weight unique linking sites far above repeat links from the same site. Fifty links from fifty domains beat five hundred from one.
2. Prioritize stronger, real sites. One link from an established publication outweighs a stack of directory links — the logic behind guest posting and niche edits on genuinely trafficked sites.
3. Keep the profile clean. Manufactured link networks pump the number short-term while Google discounts the links. The score rises; the rankings don't follow.
4. Be patient with the curve. A jump from DR 10 to 30 in a year is normal; DR 60 to 80 takes years of sustained earning.

Treat score growth as a byproduct of a real link acquisition program, not the goal. Chasing the number directly is how sites end up with impressive DR and no traffic.

When should you use DR vs DA?

Use DR when you're evaluating link opportunities. The link building industry has largely standardized on Ahrefs — sellers list guest post sites by DR, agencies set quality floors in DR, and industry surveys such as Aira's State of Link Building have consistently found more SEOs evaluate links with DR than with DA. For vetting prospects, DR plus Ahrefs' traffic data is the working standard.

Use DA when your reporting lives in Moz. If a client's existing dashboards, historical data, and agency reports are built on Moz, switching metrics mid-stream just creates confusion. DA is fine for tracking direction over time within one tool.

Use either for trends, neither for absolutes. "Our DR went from 20 to 35 in a year" is meaningful. "We need DA 50 to rank" is not — no threshold of either metric guarantees anything, because Google reads neither.

One more nuance: both are domain-level scores, and rankings happen at the page level. Ahrefs' own URL Rating correlates more strongly with rankings than DR does — a strong page on a modest domain beats a weak page on a strong one more often than domain scores suggest.

Why organic traffic is the better third signal

DR and DA share the same blind spot: both can be inflated by links Google ignores. Organic traffic can't be faked the same way. If Ahrefs shows a site ranking for hundreds of keywords and pulling steady organic visitors, that's third-party evidence Google itself trusts the domain. A DR 70 site with 200 monthly organic visits is a walking red flag — in our vetting work, that pattern usually means an expired domain rebuilt for link selling or a site that's been quietly hit by an update.

So the practical vetting stack looks like this:

1. DR (or DA) — a fast first filter to remove obviously weak sites.
2. Organic traffic and its trend — is Google actually rewarding this site right now, and is the line flat, growing, or collapsing?
3. Manual review — real content, real topical relevance, sane outbound linking patterns, and clean anchor usage.

A genuinely strong site passes all three. Plenty of DR 60+ domains fail at step two, which is exactly why "DR 60 guaranteed" offers are priced the way they are. This is the core of how we vet placements for authority backlinks: every site is checked in Ahrefs for referring domains, traffic, and traffic trend before it's ever proposed — and you see the live metrics before you pay. If you want the fuller picture of what makes a linking domain valuable beyond its score, our guide to referring domains breaks it down.

FAQ

Is DR or DA more accurate?

Neither is "accurate" in the sense of matching Google, because Google uses neither. DR is more transparent (you can trace it to specific referring domains) and is the de facto standard in link buying. DA is a reasonable comparative benchmark inside the Moz ecosystem. For vetting link prospects, DR plus organic traffic is the more useful combination.

Is DR 50 the same as DA 50?

No. The two scales aren't calibrated to each other, so the same number means different things in each tool. The same site often shows a 15–25 point gap between its DR and DA. Compare DR against DR and DA against DA — never across tools.

Why did my DA drop when I didn't lose any links?

DA is recalibrated against other domains and periodically retrained. If competing sites gained links or Moz updated its model, your score can slide with no change on your end. It's a relative metric, not an absolute one.

What is a good DR or DA for a website that sells links?

There's no magic number, but many buyers set a floor around DR 30–40 for paid placements. The floor only matters alongside traffic: a DR 40 site with solid, stable organic traffic beats a DR 65 site with none. Score without traffic is the most common trap in buying backlinks.

Can I increase DR or DA quickly?

Only by earning links from more unique, stronger referring domains — there's no shortcut that moves the real thing. Schemes that pump the score without earning genuine links (link farms, expired-domain redirects) inflate the number while Google discounts the links behind it, and the logarithmic scale means gains slow sharply past the mid-range anyway.

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Want to see the actual Ahrefs numbers — DR, traffic, and trend — for every site before you spend a dollar? That's how LinkVetted works by default: proof first, payment after.