Ahrefs Domain Rating vs Semrush Authority Score: Which Metric Matters

If you track Ahrefs Domain Rating in one tab and Semrush Authority Score in another, you've probably noticed they rarely agree. A site can show DR 45 in Ahrefs and Authority Score 32 in Semrush — or the reverse. Founders waste hours trying to reconcile two numbers that were never designed to match. This guide explains what each metric measures, why they diverge, and how to improve both with the same foundational tactic.

What Ahrefs Domain Rating Measures

Domain Rating (DR) is Ahrefs' measure of the strength of a website's backlink profile on a 0–100 logarithmic scale. It looks at the quantity and quality of dofollow links pointing at a domain, weighted by the DR of the linking domains. Crucially, DR considers the link graph — it measures how authoritative the sites linking to you are, and how authoritative their linkers are. It is purely a backlink-strength metric; it does not factor in traffic, content, or rankings directly.

What Semrush Authority Score Measures

Authority Score (AS) is Semrush's compound metric, also on a 0–100 scale, but it blends three signals:

Link power — the quality and quantity of backlinks (similar to DR's core).
Organic traffic — estimated visits from search, which DR ignores.
Spam factors — signals of manipulative link building that can suppress the score.

Because AS folds in traffic and spam, a site with strong links but weak organic traffic can score lower in Semrush than in Ahrefs, and vice versa.

Key Differences at a Glance

Dimension	Ahrefs DR	Semrush AS
Core input	Backlink strength	Links + traffic + spam
Scale	0–100, logarithmic	0–100
Traffic included?	No	Yes
Spam penalty	Implicit via link quality	Explicit factor
Update frequency	Continuous crawl + periodic recalc	Regular updates

The takeaway: DR answers "how strong are your links?" while AS answers "how authoritative and healthy is your domain overall?"

Why the Numbers Diverge

Several forces push them apart:

Traffic differences. A site with great links but little organic traffic looks strong in Ahrefs, weaker in Semrush.
Spam modeling. Semrush may discount manipulative patterns Ahrefs weights more neutrally.
Crawl differences. The two tools index different portions of the web, so link counts differ.
Recalculation timing. Updates land on different schedules, creating temporary gaps.

None of this means one is "wrong." They are measuring related but distinct things.

Which One Should You Trust?

Trust the one that matches your goal:

If you care about link-building progress (the foundation of rankings), DR is the cleaner signal because it isolates backlink strength.
If you care about overall domain health and visibility, AS adds traffic and spam context that DR misses.
Best practice: track both, but treat DR as your link-building KPI and AS as a holistic health check.

Neither replaces rankings and conversions — those are the outcomes that actually pay you.

How to Improve Both at Once

The shared core of both metrics is backlink quality. Improve your link profile and both scores rise:

Earn dofollow links from authoritative, relevant domains. This lifts DR directly and boosts the link-power component of AS.
Avoid spam patterns. Clean, curated placements satisfy both tools' quality filters.
Build a diversified profile. 50+ distinct referring domains is resilient across both models.
Plant the baseline fast. Submit across a vetted network of 50+ indexed, dofollow directories — plans from $30 (5 links) to $150 (50 dofollow backlinks) — so both metrics start climbing together.

Because directories are indexed and dofollow, they feed the link-graph inputs both tools rely on.

The Traffic Link

Since Semrush weights traffic, the second lever is actual organic visits — which your DR-driven rankings help produce. The sequence is: build DR via dofollow directories → pages rank → traffic grows → Authority Score rises further. The two metrics are connected by the same engine; you just start the engine with links.

FAQ

Why is my DR higher than my Authority Score? Usually because Ahrefs weights your links more favorably while Semrush discounts for low traffic or spam factors.

Which matters more for rankings? Neither directly; Google uses its own signals. DR and AS are diagnostic proxies for the authority that supports rankings.

Can I have a high AS and low DR? Yes, if you have strong organic traffic but a thinner backlink profile — Semrush rewards the traffic Ahrefs ignores.

Do directories help both? Yes — indexed dofollow directory links feed the shared backlink-strength input of both metrics.

Should I report one or both to stakeholders? Report both with context: DR for link progress, AS for health, and rankings/traffic as the real outcomes.

A Side-by-Side Scoring Example

Consider a fictional SaaS, "Acme", with 200 dofollow backlinks from 40 distinct domains averaging DR 35, plus 8,000 monthly organic visits. In Ahrefs, Acme might show DR 42 — strong links, no traffic considered. In Semrush, the same links plus the 8,000 visits and a clean spam score might yield Authority Score 48, or if traffic were thin, 36. The gap is not an error; it is the traffic and spam factors doing their job. Reading both numbers together tells a fuller story than either alone.

Which Tool for Which Team

SEO and link-builders lean on Ahrefs DR for a clean read on backlink strength and campaign progress.
Founders and marketers favor Semrush AS for a holistic health score that includes visibility.
Agencies report both to clients with context, since stakeholders often have a preferred tool.

Neither is "right"; they answer different questions. Pick based on the decision you are making, not tribal loyalty.

Tracking Both Without Losing Your Mind

Create one simple dashboard: DR (Ahrefs) as your link KPI, AS (Semrush) as your health check, and rankings/traffic as the outcomes. Update weekly. When both metrics rise together, your foundation is solid; when they diverge sharply, investigate the traffic or spam factor driving the gap. This two-metric view catches problems a single tool hides.

The Underlying Truth

Both DR and Authority Score are proxies for one thing: how much search engines trust your domain. They approximate it differently, but the lever that moves both is the same — quality, relevant, dofollow backlinks from diverse domains. Master that, and the metric debate becomes background noise. The work is identical regardless of which column your stakeholder reads.

Common Misreading Traps

Founders fall into three traps: (1) obsessing over a 2-point gap between tools as if it were a bug; (2) switching tools mid-campaign and thinking progress reversed; (3) reporting only the higher number to look good, which collapses under scrutiny. Avoid all three by fixing the metric you track, reporting both with context, and letting rankings and revenue be the final arbiter. Metrics inform; they do not decide.

A Practical Recommendation

If you can only watch one, watch DR for link-building momentum and glance at AS quarterly for health. If you watch both weekly, you will notice that the fastest way to lift the shared link-strength core is a batch of curated dofollow directory placements — the tactic that feeds the input both models rely on most. The debate over which tool wins is less useful than the discipline of building authority both agree on. Do that consistently, and the numbers take care of themselves.

Using Both to Report Progress

When communicating with stakeholders, lead with outcomes — rankings and signups — then show DR and AS as supporting evidence. Presenting only metrics invites arguments about which tool is "right." Instead, say "our dofollow placements lifted DR from 18 to 27 and Authority Score from 22 to 31 in one quarter, and organic signups followed." Both numbers then tell the same story: the foundation is working. That narrative beats any single-score debate.

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