## What Are Authority Scores in SEO?

Authority scores are proprietary metrics that SEO platforms use to estimate the relative authority and ranking potential of a website. They're based on each platform's own backlink data and scoring models. Search engines do not publish or use these scores as direct ranking factors.

Instead, authority scores provide a standardized way to:

- Compare websites within your industry
- Evaluate backlink opportunities
- Benchmark competitors
- Measure SEO progress over time

## How Authority Scores Are Calculated

Every authority score uses a **proprietary methodology**. Most scoring systems analyze factors such as:

- Backlink quantity and quality
- Number of referring domains
- Spam indicators and link health
- Other domain authority signals

Most platforms use a **0 to 100 scale**, though the calculation method differs between providers. Because each tool weighs these factors differently and maintains its own link index, the same website can receive different authority scores depending on which platform you use.

## Why Authority Scores Vary Across Platforms

The same domain can receive dramatically different scores from different SEO tools because:

- Each platform crawls and indexes backlinks at different frequencies
- Scoring models weigh backlinks, domain age, and other signals differently
- Some metrics incorporate ranking and traffic data; others focus solely on link profiles
- Update cadence varies—some refresh monthly, others weekly or daily

Choosing an authority metric is less about finding the "correct" score and more about selecting a methodology that stays **consistent across your reporting**. Without understanding how each metric is calculated, comparing websites or measuring SEO progress over time becomes unreliable.

## What to Look for in an Authority Tracking Tool

When evaluating an authority score tracking tool, prioritize these criteria:

- **Metric transparency:** The tool should clearly document how its authority score is calculated, what signals it weighs, and how often it updates. Unexplained score shifts create confusion in client reporting.
- **Multi-domain tracking:** Agencies managing multiple clients need to pull authority scores in bulk without opening each domain individually. Batch analysis and portfolio dashboards cut reporting time significantly.
- **Update frequency:** A score that refreshes once per month provides a different baseline than one that updates every two weeks. Match update cadence to your reporting cycle.
- **Backlink index quality:** Authority metrics are only as reliable as the backlink data behind them. Larger, more frequently crawled indexes produce scores that reflect current link profiles.
- **Integration with ranking and traffic data:** Tools that combine authority scores with keyword rankings and organic traffic give a fuller picture of domain health than link-only metrics.

## Best Tools for Tracking Authority Scores

The following tools are widely used for tracking authority scores and evaluating domain strength:

- **Search Atlas:** Provides a Domain Authority score built on its own backlink index, with bulk domain analysis and portfolio-level dashboards suited for agencies. Scores are integrated alongside keyword rankings and site audit data in a single platform.
- **Ahrefs:** Uses a Domain Rating (DR) metric based on the quantity and quality of referring domains. Ahrefs maintains one of the largest backlink indexes and updates DR frequently, making it a reliable benchmark for link-building campaigns.
- **Moz:** Offers Domain Authority (DA), one of the most widely recognized authority scores. DA is calculated using a machine-learning model trained to correlate with Google search rankings. Moz also provides Page Authority (PA) for individual URLs.
- **Semrush:** Uses an Authority Score that combines backlink data with organic traffic signals and spam detection. This blended approach means the score reflects both link profile strength and real-world search visibility.
- **Majestic:** Offers Trust Flow and Citation Flow as complementary metrics. Trust Flow emphasizes link quality from trusted seed sites, while Citation Flow reflects raw link volume. Using both together gives a more nuanced view of backlink health.

No single tool is objectively correct. The best approach is to select one platform as your primary authority benchmark and use it consistently across all reporting periods and client accounts. If you track multiple metrics, document which tool's score is being referenced in each report to avoid confusion.

If you need further assistance, open the chat widget in the bottom-right corner of the platform and type **human teammate** to be connected with a member of our team.