Moz’s Domain Authority (DA) and Page Authority (PA) have served as the primary shorthand for site strength for over a decade. However, relying on a single metric from a single provider creates a strategic blind spot. DA and PA are proprietary scores calculated by Moz based on their specific web index, which may not always reflect the most recent link acquisitions or the nuances of specific regional markets. Furthermore, Moz’s crawl frequency can lag behind competitors, leading to "stale" scores that do not reflect recent SEO efforts or penalty recoveries.
For SEO professionals, the need for alternatives arises from the demand for higher data granularity and better correlation with actual search engine results pages (SERPs). Different tools use different algorithms to weigh link quality, "do-follow" versus "no-follow" ratios, and the topical relevance of referring domains. Moving beyond DA and PA allows marketers to cross-reference multiple data points, ensuring that a backlink prospect or a competitor’s site is as influential as the numbers suggest. This comparison focuses on tools that provide their own proprietary authority metrics, backed by independent web crawls and distinct data processing logic.
What to Look For in an Alternative
When evaluating a replacement for Moz’s metrics, the most critical factor is the size and freshness of the tool’s link index. A metric is only as good as the data feeding it; if a tool’s crawler misses 30% of the web’s active backlinks, its authority score will be fundamentally flawed. Look for providers that update their index daily and offer a "live" view of links rather than a monthly snapshot.
Secondly, consider the logic behind the score. Some tools, like Majestic, split authority into two distinct categories: volume and quality. Others, like Semrush, incorporate traffic data into their authority scores to ensure the metric isn't easily manipulated by spammy, low-traffic link farms. An alternative should also offer bulk checking capabilities via API or CSV upload, as manual checking is inefficient for large-scale link building or competitive audits. Finally, verify the correlation between the tool’s metric and actual organic traffic. A high authority score on a site with zero organic visits is a red flag that the metric is being gamed.
1. Ahrefs
Ahrefs provides the most widely used alternative to DA/PA in the form of Domain Rating (DR) and URL Rating (UR). DR is a logarithmic scale from 0 to 100 that measures the strength of a website’s overall backlink profile. Unlike some metrics that factor in various on-page elements, DR focuses purely on link popularity. It is calculated by looking at the quantity and quality of unique domains linking to a site. Ahrefs operates one of the world's most active commercial web crawlers, often discovering new links faster than any other third-party SEO tool. This makes DR a highly reactive metric for tracking the immediate impact of link-building campaigns.
Key Features: The platform offers a "Site Explorer" that breaks down DR alongside organic traffic estimates and keyword rankings. It also provides a "Link Intersect" tool to find sites linking to competitors but not to you. The UR metric provides a more granular look at individual page strength, which is essential for auditing specific high-value content pieces.
Pricing: Plans start at approximately $99 per month for the Lite tier, though most professional SEOs require the Standard plan at $199 per month to access historical data and more extensive reporting limits.
Best For: Serious link builders and agencies who require the most comprehensive and frequently updated backlink index available.
Pros:
- Massive link index that is updated every 15-30 minutes.
- DR is difficult to "game" compared to older versions of DA.
- Excellent visualization of DR growth over time.
Cons:
- The pricing structure has become more restrictive with "per-credit" usage models.
- Does not factor in traffic or "spamminess" directly into the DR score.
2. Semrush
Semrush uses "Authority Score" (AS) as its primary metric for measuring domain strength. What sets AS apart from Moz’s DA is its multi-layered calculation. Semrush doesn't just look at the number of backlinks; it uses machine learning to evaluate the "naturalness" of the link profile. The score incorporates backlink data, organic search data, and website traffic data. This holistic approach is designed to resist manipulation. If a site has thousands of backlinks but zero organic traffic, Semrush will suppress the Authority Score, signaling that the links are likely from a low-quality or "dead" network.
Key Features: The "Backlink Audit" tool is a standout feature, allowing users to identify "toxic" links that might be inflating authority scores artificially. The Authority Score is also integrated into the "Keyword Overview" tool, helping users judge the difficulty of ranking for specific terms based on the AS of the current top-ranking pages.
Pricing: The Pro plan starts at $129.95 per month. Higher tiers, such as Guru ($249.95) and Business ($499.95), offer more historical data and increased limits for bulk analysis.
Best For: Marketing managers who want a metric that correlates closely with actual search visibility and traffic rather than just link counts.
Pros:
- Includes traffic data in the authority calculation.
- Integrated spam detection helps filter out low-quality sites.
- Very high correlation with actual Google rankings.
Cons:
- The interface can be overwhelming for beginners.
- Authority Score can be slower to change than Ahrefs' DR.
3. Majestic
Majestic takes a unique approach by splitting authority into two distinct metrics: Trust Flow (TF) and Citation Flow (CF). Citation Flow refers to the "power" or volume of links, similar to the traditional concept of PageRank. Trust Flow, however, measures the quality of those links by looking at how close a site is to a set of "seed" sites known to be trustworthy. By comparing the ratio of TF to CF, SEOs can quickly identify sites that have a high volume of links but very little "trust," which is a classic hallmark of a site using automated link-building software or PBNs.
Key Features: The "Topical Trust Flow" feature is arguably the most useful aspect of Majestic. It categorizes the authority of a site by niche (e.g., Health, Society, Technology). This allows you to see if a site is authoritative specifically in your industry, rather than just having a high general score from unrelated links.
Pricing: Majestic is one of the more affordable professional options, with the Lite plan starting at $49.99 per month. The Pro plan, which includes the full "Fresh Index," is $99.99 per month.
Best For: Technical SEOs performing deep link audits and those looking for niche-specific authority metrics.
Pros:
- The TF/CF ratio is the best indicator of link profile health.
- Topical Trust Flow provides context that other metrics lack.
- Extremely deep historical index reaching back several years.
Cons:
- The user interface feels dated compared to Semrush or Ahrefs.
- Does not provide organic traffic estimates, focusing solely on links.
4. SE Ranking
SE Ranking offers "Domain Trust" (DT) and "Page Trust" (PT) as its alternatives to DA and PA. These metrics are calculated based on an aggregate of the quality and quantity of a domain's referring domains and total backlinks. SE Ranking is positioned as an all-in-one SEO platform that provides a more budget-friendly entry point for small to medium-sized agencies. While its index may not be as massive as Ahrefs, it is highly accurate for mid-market competitive analysis and offers a very clean, intuitive way to track authority changes over time.
Key Features: The platform includes a "Backlink Checker" that provides a detailed breakdown of do-follow vs. no-follow links, anchor text distribution, and the Domain Trust of every referring page. It also features a "Backlink Gap" tool to compare your DT against up to five competitors simultaneously.
Pricing: SE Ranking is highly flexible. The "Essential" plan starts around $55 per month, with pricing scaling based on the frequency of keyword ranking updates and the number of tracked keywords.
Best For: Small agencies and in-house marketers who need a reliable authority metric without the enterprise-level price tag of Semrush.
Pros:
- Excellent value for the price.
- Very user-friendly reporting and dashboarding.
- Reliable data for most mainstream niches and regions.
Cons:
- The link index is smaller than the "Big Three" (Ahrefs, Semrush, Majestic).
- Fewer advanced filtering options for bulk link analysis.
5. Serpstat
Serpstat uses "Serpstat Domain Trust" (SDT) and "Serpstat Page Trust" (SPT). These are calculated using a proprietary algorithm that mimics the logic of Google’s original PageRank, focusing on the transmission of authority through the link graph. Serpstat is particularly strong in Eastern European and some Asian markets, where its crawlers often pick up localized data that US-centric tools might miss. The SDT metric is updated regularly and is integrated into their broader competitive analysis suite.
Key Features: Serpstat offers a "Batch Analysis" tool that allows you to compare the Domain Trust of up to 200 domains in a single click. It also provides a "Tree View" of site structure, showing which specific subfolders or pages carry the most Page Trust.
Pricing: The "Individual" plan starts at $59 per month. For teams requiring API access and more robust domain auditing, the "Agency" plan is priced at $479 per month.
Best For: SEOs working on international projects or those who need a robust batch-processing tool for domain metrics.
Pros:
- Strong data coverage in non-US markets.
- Fast batch analysis for large lists of domains.
- Clear visualization of how authority is distributed across a site.
Cons:
- The link index can be inconsistent for very small, niche US sites.
- SDT can sometimes fluctuate more wildly than DR or AS.
6. Mangools (LinkMiner)
Mangools takes a different approach by aggregating data from other sources, primarily using the Majestic index to power its "LinkMiner" tool. However, it introduces its own metric called "Link Strength" (LS). LS is designed to simplify the evaluation process for beginners. It takes into account the Trust Flow, Citation Flow, and the number of external links on a page to give a single, easy-to-understand score of how valuable a specific link would be for your site. While it uses external data, the way it processes and presents that data makes it a distinct alternative for those who find Majestic’s native UI difficult to navigate.
Key Features: LinkMiner includes a "Website Preview" feature that allows you to see the referring page and the exact placement of the backlink in a side panel without leaving the tool. This is a massive time-saver for manual link vetting.
Pricing: Mangools is one of the most affordable options on the market, with the "Entry" plan starting at approximately $29 per month. The "Premium" plan at $44 per month is usually sufficient for most freelancers.
Best For: Freelancers, bloggers, and SEO beginners who need a simple, visual way to assess link authority.
Pros:
- Most intuitive and well-designed UI in the industry.
- Very affordable pricing for high-quality data.
- The "Link Strength" metric is very practical for outreach vetting.
Cons:
- Relies on third-party data rather than its own crawler.
- Lacks the deep technical features required for enterprise SEO.
7. SpyFu
SpyFu is primarily known for its PPC and competitor keyword data, but it offers a "Domain Strength" metric that serves as a solid alternative for those focused on the intersection of organic and paid search. Domain Strength in SpyFu is calculated by looking at a site’s ranking history, the number of keywords it ranks for, and its backlink profile. It is a "momentum" metric; it rewards sites that are actively growing their footprint in the SERPs, making it useful for identifying "up-and-coming" competitors that might still have a low DA but are gaining significant traction.
Key Features: The "Kombat" tool allows you to see the overlap in authority and keyword rankings between three competitors. SpyFu also provides a 10-year history of a domain’s strength, which is invaluable for identifying sites that have been hit by past Google updates.
Pricing: The Basic plan starts at $39 per month. The Professional plan, which includes more API rows and custom reporting, is $79 per month.
Best For: Marketers who prioritize competitive intelligence and want to see how domain authority translates into actual keyword "real estate."
Pros:
- Excellent historical data going back over a decade.
- Combines SEO and PPC data for a broader view of authority.
- Very competitive pricing for the amount of data provided.
Cons:
- The backlink-specific data is not as deep as Ahrefs or Majestic.
- Domain Strength is more of a "visibility" score than a "link power" score.
How to Choose the Right Alternative
Choosing the right authority metric depends entirely on your specific workflow. If your primary goal is high-end link building and you need the most accurate, real-time data on new backlinks, Ahrefs and its Domain Rating (DR) is the industry standard. The speed at which they update their index is currently unmatched, which is vital for monitoring the success of a PR campaign or a guest posting blitz.
If you are more concerned with the quality and "safety" of a domain, Majestic is the superior choice. The Trust Flow metric is the most reliable way to distinguish between a site that has a high authority score due to spam and one that is genuinely respected in its niche. For those who need a "set it and forget it" tool that balances price with a wide range of features, SE Ranking or Mangools provide excellent value without the steep learning curve. Ultimately, the best practice for professional SEOs is to use at least two of these metrics in tandem—for example, checking a site’s DR for power and its Trust Flow for quality—to get a 360-degree view of website authority.
Frequently Asked Questions
Which metric is the most accurate?
Accuracy is subjective because none of these tools are used by Google. However, Ahrefs' DR and Semrush's AS are generally considered to have the highest correlation with organic search rankings across a broad range of industries.
Why is my DA higher than my DR?
This happens because Moz and Ahrefs have different crawl capacities and use different formulas. Moz might have discovered links that Ahrefs hasn't yet, or Moz might give more weight to certain types of links (like older domains) than Ahrefs does.
Can these metrics be manipulated?
Yes. All third-party metrics can be artificially inflated by "link injections" or redirecting high-authority expired domains. This is why you should always look at organic traffic alongside authority scores to ensure the site is actually "alive" in Google’s eyes.
Do these tools provide free versions?
Most of these tools offer limited free versions or "free tools" (like Ahrefs' Free Backlink Checker) that allow you to check the authority of a single domain at a time, but bulk analysis always requires a paid subscription.
Is Domain Authority still important for SEO?
While Google does not use DA or DR as a ranking factor, these metrics remain essential for SEOs to benchmark competitors and vet link prospects. They are proxies for the "PageRank" system that Google uses internally.
