DR, DA, and Trust Flow: Comparing Backlink Authority Metrics

Introduction

Anyone shopping for backlinks eventually runs into an alphabet soup of scores: DR, DA, PA, TF, CF, UR, and more. Two of these, Domain Rating (DR) from Ahrefs and Domain Authority (DA) from Moz, get compared constantly, and most buying guides stop there. But there is a third metric that deserves equal attention: Trust Flow, developed by Majestic. Trust Flow approaches link authority from a fundamentally different angle than either DR or DA, and ignoring it means making backlink decisions with an incomplete picture.

If you have already read a guide that only compares DA and DR, this article picks up where that conversation leaves off. DR and DA are both primarily link-quantity-weighted scores - they look at how many links point to a domain and how authoritative those linking domains are, then compress that into a 0-100 number. Trust Flow asks a different question: how closely connected is this domain, through its link neighborhood, to sites that are widely considered trustworthy? That distinction matters more than it sounds, because it means Trust Flow can catch patterns that pure link-counting metrics miss, such as a domain with plenty of links but from a neighborhood of low-quality or spammy sites.

This matters directly for anyone buying backlinks through a marketplace like Akua Adforce. Every third-party metric has blind spots. A site can have an impressive DR because it accumulated links from hundreds of smaller blogs, while its DA sits lower because Moz's index and algorithm weigh things differently, while its Trust Flow is modest because many of those linking blogs sit several hops away from a trusted seed set. None of these three numbers is "wrong" - they are measuring overlapping but distinct things, built from different crawl data, different algorithms, and different definitions of what counts as a meaningful link.

The goal of this article is not to declare a winner. It is to explain what each metric actually measures, how Trust Flow's logic differs from DR and DA's logic, and how to combine all three (along with non-metric judgment) into a decision framework you can actually use when evaluating a backlink opportunity. By the end, you should be able to look at a listing showing DR 42, DA 38, and TF 25 and understand what story those three numbers are telling together, rather than just reacting to whichever one looks the most impressive.

What Is DR (Ahrefs)?

Domain Rating is Ahrefs' proprietary metric, scored on a logarithmic scale from 0 to 100, that estimates the overall strength of a website's backlink profile relative to other websites in Ahrefs' index. It is explicitly described by Ahrefs as a relative metric: a DR of 70 does not mean a site has some fixed, absolute quality score; it means that, based on the backlinks pointing to it, the site ranks higher in link strength than a large proportion of other domains Ahrefs has crawled.

The underlying calculation is link-graph-based. Ahrefs crawls the web and builds a massive graph of which domains link to which other domains. DR is calculated using a variant of the same mathematical family as Google's original PageRank algorithm, distributing "authority" across that graph based on how many domains link in, and how strong those linking domains are themselves. Importantly, DR counts backlinks at the domain level, not the page level - one domain linking to you counts once for DR purposes regardless of how many individual pages on that domain link to you. This is different from Ahrefs' page-level metric, URL Rating (UR), which does account for page-specific link signals.

Because DR is logarithmic, the jump in actual link strength needed to move from, say, 20 to 30 is much smaller than the jump needed to move from 70 to 80. This is a crucial and frequently misunderstood detail: a site moving from DR 10 to DR 20 might only need a handful of decent links, whereas a site moving from DR 80 to DR 90 needs an enormous and sustained link-acquisition effort. Buyers who assume DR scales in a straight line often misjudge how impressive a given DR number really is.

DR is also sensitive to a domain's total link profile, including toxic or spammy links, unless Ahrefs' crawler excludes them from its graph. A site can inflate its DR somewhat through aggressive, lower-quality link building, which is one reason DR should never be the only number consulted before buying a placement. It is a useful, widely recognized signal of backlink-based strength, but it reflects Ahrefs' specific index and algorithm, not an objective, universal truth about a domain's authority.

What Is DA (Moz)?

Domain Authority is Moz's answer to the same basic question DR tries to answer: how strong is this domain's backlink profile, expressed as a single score from 0 to 100? Like DR, DA is a relative, predictive metric. Moz built DA originally to estimate how well a domain is likely to rank in search results compared to other domains, based primarily on link data, though Moz has repeatedly cautioned that DA is not something Google itself uses or sees, and it is not a guarantee of ranking position.

DA's calculation draws on Moz's own Link Explorer index and uses a machine-learning model that considers dozens of factors extracted from the link graph, including the number of linking root domains and the overall quantity and quality of links, to produce a score correlated with search performance across a large training set of domains. Because Moz periodically retrains this model and updates its index, DA scores can shift for a domain even when nothing about that domain's own backlink profile has changed - a point that frequently confuses site owners who see their DA move without any corresponding changes on their side.

One practical difference buyers should know: Moz's crawler and index are simply a different dataset from Ahrefs' crawler and index. The two companies do not share raw crawl data, so they inevitably "see" a different, overlapping-but-not-identical slice of the web's link graph. That is a major reason the same domain can show noticeably different DR and DA scores - it is not that one tool is right and the other wrong, it is that they are counting from different inventories of discovered links and weighting them with different formulas.

Moz also publishes Page Authority (PA), the page-level counterpart to DA, similar in spirit to Ahrefs' UR. When evaluating a specific article placement rather than a whole domain, PA (or UR) can sometimes be more relevant than the domain-level score, since what matters for a single backlink is often the specific page it will live on, not just the domain's reputation as a whole.

What Is Trust Flow (Majestic), and How Does It Relate to Citation Flow?

Trust Flow is Majestic's signature metric, and it works on a meaningfully different principle than DR or DA. Instead of primarily counting links and weighting them by the authority of the linking domain, Trust Flow starts from a curated "seed set" of websites that human reviewers have identified as trustworthy. It then measures how many link "hops" away from that trusted seed set a given domain sits. The fewer hops, and the stronger the paths back to trusted sites, the higher the Trust Flow score. A domain that is linked to directly by well-regarded, trustworthy sites will tend to have a high Trust Flow; a domain that is many hops removed, or that mostly receives links from other low-trust domains, will score lower, even if it has a large raw number of backlinks.

Majestic pairs Trust Flow with a companion metric called Citation Flow, which is much closer in spirit to DR and DA: Citation Flow predicts influence or strength based primarily on the quantity of links pointing at a domain, largely independent of the quality or trustworthiness of those links. A domain can have a high Citation Flow (lots of links) but a comparatively low Trust Flow (those links come from a low-trust neighborhood), and this gap is informative in its own right.

This is exactly where the practical value of Trust Flow shows up for backlink buyers: the ratio between Trust Flow and Citation Flow (often called the TF/CF ratio) is widely used as a rough signal of link-profile quality versus quantity. A domain with Citation Flow dramatically higher than its Trust Flow often indicates a link profile built from a large volume of low-trust, low-relevance, or spam-adjacent sources - the kind of profile that can occur with aggressive, poorly targeted link building or historical link-scheme participation. A domain where Trust Flow and Citation Flow sit closer together generally suggests a link profile built more organically from reputable sources, even if the absolute numbers are more modest than a DR or DA score might suggest.

In other words, Trust Flow does not simply duplicate what DR and DA already tell you. It adds a distinct lens: proximity to trusted sources, rather than sheer volume-adjusted authority. This is why experienced buyers who rely only on DR or DA sometimes get surprised by a site that "looks" strong on paper but underperforms, or by a site with a modest DR/DA that nonetheless sits in excellent company trust-wise and performs well as a link source.

Comparing the Three Metrics Side by Side

Looking at these side by side, a pattern emerges: DR and DA are closer cousins to each other than either is to Trust Flow. Both DR and DA are fundamentally built around link graphs weighted by the authority of linking domains, and both are expressed on a comparable 0-100 relative scale designed to approximate "how strong is this domain's backlink profile compared to others." Trust Flow, by contrast, asks a qualitatively different question centered on trust-network proximity rather than authority-weighted volume. This is precisely why pairing Trust Flow (and its sibling Citation Flow) alongside DR or DA gives a more rounded picture than looking at any single number.

Consider a hypothetical comparison. Site A shows DR 55, DA 48, Trust Flow 12. Site B shows DR 35, DA 30, Trust Flow 28. On DR and DA alone, Site A looks like the stronger buy. But Site A's very low Trust Flow relative to its DR/DA suggests its link profile may be built from a large volume of links that are not well-trusted - potentially low-quality directories, link exchanges, or a spam-adjacent neighborhood. Site B, despite lower DR and DA, has a Trust Flow that is proportionally much closer to its other scores, suggesting its smaller link profile is built from more trustworthy sources. Neither number alone tells the full story; the pattern across all three is what is informative.

It is also worth noting that these three tools do not crawl identical slices of the web. Ahrefs, Moz, and Majestic each maintain independent crawlers and indexes, discovering and valuing links differently. A backlink that one tool's crawler has indexed might not yet be indexed by another, and a link that one algorithm weighs heavily might be weighed lightly by another. This is a normal, expected consequence of using three separate measurement systems - not a sign that one tool is "more accurate" than the others. Buyers should treat all three as independent, imperfect instruments pointed at the same underlying reality, each catching a slightly different angle of it.

Finally, remember that none of these metrics measures referral traffic, topical relevance, or editorial placement quality directly. A backlink from a site with excellent DR, DA, and Trust Flow, placed in a footer or an unrelated category, still delivers far less practical value than a contextual, relevant link from a site with more moderate scores across the board. Metrics are a screening tool, not a replacement for judgment about fit and context.

None of These Are Official Google Ranking Factors

This point deserves direct and repeated emphasis: DR, DA, and Trust Flow are all third-party metrics, created by SEO tool companies, and none of them are used by Google's own ranking systems. Google has stated publicly, on multiple occasions, that it does not use Domain Authority, Domain Rating, Trust Flow, or any other third-party "authority score" as an input to its search algorithms. These scores are useful approximations built by Ahrefs, Moz, and Majestic respectively, based on their own independent crawls of the web, designed to help SEO professionals and marketers get a rough, comparative sense of backlink strength. They are correlation tools, not causation levers - buying a link specifically to move a DR or DA number, without regard to its real-world relevance or quality, misunderstands what these metrics are for.

What actually matters for how Google evaluates a site and its content sits much closer to Google's own publicly documented framework: Experience, Expertise, Authoritativeness, and Trustworthiness, commonly abbreviated E-E-A-T. This framework, described in Google's Search Quality Rater Guidelines, is about whether content demonstrates genuine firsthand experience, subject-matter expertise, recognized authority in its field, and overall trustworthiness - assessed by human quality raters and reflected (imperfectly, and alongside hundreds of other signals) in Google's actual ranking systems, not by any single external number.

Here is where backlinks and E-E-A-T genuinely connect, without needing a third-party score as the middleman: a link from a genuinely authoritative, topically relevant, trustworthy source is itself a real-world signal of trust and relevance that search engines are designed to recognize, independent of what any DR, DA, or Trust Flow number says about it. A relevant mention from a respected industry publication, a trade association, or a well-established niche site communicates credibility in a way that is substantive, not just numerically convenient. DR, DA, and Trust Flow are reasonable proxies for trying to estimate that credibility at scale without manually reading every linking site - but they are proxies, not the thing itself.

This distinction should change how buyers frame their goals. The goal of acquiring a backlink should not be "raise my DR by three points" or "find anything with Trust Flow over 20." The goal should be building genuine relevance and trust signals that happen to be partially, imperfectly visible through these metrics. When you optimize for the proxy instead of the underlying reality, you risk ending up with a portfolio of technically impressive-looking links that do little for actual rankings, actual referral traffic, or actual brand credibility - the things that matter in practice.

A Practical Decision Framework for Buying Backlinks

Given that no single metric tells the whole story, a more reliable approach treats DR, DA, and Trust Flow as three inputs into a broader evaluation, rather than a single pass/fail gate. Start by checking all three scores together rather than just the one your marketplace happens to surface most prominently. If a listing on Akua Adforce or elsewhere shows DR, DA, and Trust Flow side by side, look for consistency: scores that broadly agree with each other, scaled appropriately for the niche and site age, are generally more reassuring than one standout high number alongside two much lower ones.

Next, weigh topical relevance at least as heavily as any authority score. A backlink from a modestly scored site that is genuinely relevant to your industry, with real editorial standards and an engaged audience, is very often more valuable than a higher-scored but off-topic placement. Relevance signals tie directly back to the E-E-A-T concepts discussed above, and they are something no single metric fully captures.

Third, look past the score to the site itself. Does it have a visible editorial process, real contact information, a plausible publishing history, and genuine traffic rather than a thin shell designed purely to sell links? A quick manual look at the site's homepage, recent articles, and overall design quality often reveals more than any metric about whether a placement will hold long-term value.

Fourth, consider the TF/CF ratio from Majestic specifically as a sanity check against inflated DR or DA. If a site's Citation Flow is dramatically higher than its Trust Flow, treat that as a prompt for closer scrutiny rather than an automatic disqualifier - context matters, including niche, site age, and the kind of content being linked.

Finally, diversify your sources across a reasonable range of scores and site types rather than chasing only the single highest number you can find within budget. A natural-looking backlink profile typically includes a mix of link strengths, built up over time, rather than a cluster of similarly scored placements acquired all at once. This diversification also reduces risk: relying on any single metric, or any single source, concentrates risk in ways that a more balanced approach avoids.

Common Mistakes When Comparing Authority Metrics

• Treating DR, DA, or Trust Flow as an official Google ranking signal. None of these is used by Google's actual algorithms; they are third-party approximations built from independent crawl data, useful for comparison but not a guarantee of ranking impact.
• Comparing DR and DA as if they are interchangeable. Because Ahrefs and Moz crawl different slices of the web and use different algorithms, the same domain can reasonably show different DR and DA values without either tool being "wrong."
• Ignoring Trust Flow and Citation Flow entirely. Skipping Majestic's metrics means missing the one signal in this trio specifically designed to separate link trustworthiness from raw link volume.
• Assuming DR's logarithmic scale behaves like a linear one. A jump from DR 10 to DR 20 represents a much smaller real-world change in link strength than a jump from DR 70 to DR 80, so comparing point differences across different ranges can be misleading.
• Buying a link purely to move a metric number, rather than for relevance and audience fit. Optimizing for the proxy instead of the underlying trust and relevance it is meant to represent tends to produce a link portfolio that looks fine on paper but underperforms in practice.
• Skipping a manual look at the actual site. No score, however reputable, substitutes for checking whether a site has real content, real editorial standards, and a real audience before committing budget to a placement.

Conclusion

DR, DA, and Trust Flow each answer a slightly different question about a website's backlink profile. DR and DA, from Ahrefs and Moz respectively, are both fundamentally link-graph metrics weighted by the authority of linking domains, expressed on comparable relative scales but built from different indexes and algorithms. Trust Flow, from Majestic, takes a distinct approach centered on proximity to a curated set of trusted sites, and pairs naturally with Citation Flow to reveal whether a link profile leans more toward quality or toward sheer volume. None of the three is an official Google ranking factor, and none should be treated as a stand-in for genuine topical relevance, editorial quality, or the broader E-E-A-T principles that actually inform how search engines evaluate trust and authority.

The most reliable way to use these metrics is together, not in isolation: look for consistency across DR, DA, and Trust Flow, weigh relevance and real editorial quality at least as heavily as any single score, and treat outlier patterns - like a high DR paired with a notably low Trust Flow - as a prompt for closer manual review rather than an automatic green or red light. When evaluating backlink opportunities through a marketplace like Akua Adforce, this combined approach gives a far more honest read on a site's real value than chasing whichever single number happens to look most impressive at first glance. Authority metrics are tools for comparison, not guarantees of results, and the buyers who get the most value from them are the ones who understand exactly what each one is, and is not, actually measuring.

You may also find our guide on Transparency in the Backlink and Guest Post Supply Process for Agencies useful.