Domain Authority vs Domain Rating

Quick Summary

Domain Rating (DR): Ahrefs metric (0-100) that measures backlink profile strength based on the quantity and quality of backlinks.
Domain Authority (DA): Moz metric (0-100) that predicts how well a domain will rank, using a machine learning model with multiple factors.
Key difference: DR focuses purely on backlinks, while DA uses a predictive model with multiple ranking factors.
Which to trust: DR is generally more accurate for backlink analysis, while DA is a broader ranking predictor. Most SEO professionals prefer DR for domain evaluation.
Why it matters: Understanding the difference helps you choose the right metric for evaluating domains and making purchasing decisions.

Domain Authority vs Domain Rating: What's the Difference?

Domain Authority (DA) and Domain Rating (DR) are two popular metrics for measuring domain strength, but they work very differently. Understanding the difference is crucial for evaluating domains and making informed purchasing decisions.

While both metrics use a 0-100 scale and measure domain strength, they calculate scores using completely different methods. Domain Rating (DR) from Ahrefs focuses exclusively on backlink profile strength, while Domain Authority (DA) from Moz uses a machine learning model to predict ranking potential.

What is Domain Rating (DR)?

Domain Rating is Ahrefs' metric that measures the strength of a domain's backlink profile:

Scale: 0-100 (logarithmic scale)
Focus: Purely based on backlink quantity and quality
Calculation: Based on the number and quality of backlinks, considering the DR of linking domains
Updates: Updated regularly as Ahrefs crawls the web
Accuracy: Highly accurate for measuring actual backlink profile strength

What is Domain Authority (DA)?

Domain Authority is Moz's metric that predicts how well a domain will rank in search results:

Scale: 0-100 (logarithmic scale)
Focus: Predictive ranking model using multiple factors
Calculation: Machine learning model considering backlinks, content quality, user signals, and other ranking factors
Updates: Updated periodically as Moz's model evolves
Accuracy: Predictive model, not a direct measurement of backlink strength

Key Differences Between DR and DA

Aspect	Domain Rating (DR)	Domain Authority (DA)
Provider	Ahrefs	Moz
Focus	Backlink profile strength	Overall ranking potential
Calculation	Based on backlink quantity/quality	Machine learning model with multiple factors
Accuracy for backlinks	Highly accurate	Less precise for backlink analysis
Use case	Evaluating backlink strength	Predicting ranking potential
Industry preference	Preferred by most SEO professionals	Less commonly used for domain evaluation

Which Metric Should You Trust?

For domain evaluation and purchasing decisions, Domain Rating (DR) is generally more reliable:

More accurate for backlinks: DR directly measures backlink profile strength, which is what you're buying when purchasing domains
Industry standard: Most SEO professionals and domain marketplaces use DR for evaluation
Consistent measurement: DR is based on actual backlink data, not predictions
Better for domain evaluation: When purchasing domains for their backlinks, DR tells you exactly what you're getting

However, DA can be useful for:

Broad ranking predictions: If you want a general sense of ranking potential
Quick comparisons: When you need a fast overview of multiple domains
Complementary data: As additional context alongside DR

Why Domain Rating is Preferred for Domain Evaluation

When evaluating domains for purchase, DR is preferred because:

Direct measurement: DR directly measures what you're buying - the backlink profile strength
Transparent calculation: Based on actual backlink data from Ahrefs' extensive index
Industry standard: Most domain marketplaces and SEO professionals use DR
Better correlation: DR correlates more closely with actual link equity and referring domains
More actionable: DR tells you exactly what backlink strength you're acquiring

Other Domain Metrics to Know

Beyond DR and DA, there are other metrics worth understanding:

URL Rating (UR): Ahrefs' metric for individual page strength (0-100)
Page Authority (PA): Moz's metric for individual page ranking potential (0-100)
Trust Flow (TF): Majestic's metric measuring trustworthiness of backlinks
Citation Flow (CF): Majestic's metric measuring quantity of backlinks
Spam Score: Various tools measure spam indicators in backlink profiles

Using Multiple Metrics Together

While DR is preferred, using multiple metrics together provides better context:

DR as primary: Use DR as your primary metric for backlink evaluation
DA for context: Check DA for additional ranking potential insights
Referring Domains count: Always check actual RD count alongside DR
Backlink profile quality: Review actual backlink quality, not just metrics

Tip: When evaluating domains for purchase, prioritize Domain Rating (DR) as your primary metric. DR directly measures backlink profile strength, which is what you're buying. At Brutal Domains, we use DR as our primary metric for all domain evaluations, ensuring you get accurate information about the backlink strength you're acquiring. Always verify DR alongside actual referring domains count and backlink profile quality for the most accurate domain evaluation.