📚 Ahrefs Review Series, Part 2 of 3
← Part 1: Main Review, Overview, pricing, quick pros/cons
Part 2: Every Feature and Metric (You're here), Detailed analysis of Ahrefs' tools and data
→ Part 3: Cons & Alternatives, Reddit feedback, Search Atlas comparison
Ahrefs features cover backlink and keyword research, technical auditing, content discovery, AI visibility tracking, and a developer API, and this Part 2 of our Ahrefs review series breaks down what each one actually does. It also covers how Ahrefs' core metrics are calculated and what changed in Ahrefs' plans and data since last year. For pricing and the overall verdict, see Part 1. For Reddit feedback and a full Search Atlas comparison, see Part 3.
What is Ahrefs?
Ahrefs is an SEO data platform that crawls the web to build its own index of backlinks, keywords, and ranking pages, then surfaces that data through a set of research tools. Founded in 2011, Ahrefs runs its own web crawler (AhrefsBot) rather than relying on Google's index or third-party APIs for its core datasets. That distinction matters for how to read every number the platform produces: Ahrefs measures what its own crawler has found and modeled, not what Google Search Console or a site's real analytics report.
Ahrefs' current plan lineup, verified against the live pricing page in September 2026, runs five tiers: a $29 a month Starter plan aimed at solo users and light competitor checks, Lite at $129 a month, Standard at $249 a month, Advanced at $449 a month, and Enterprise starting at $999 a month (monthly billing) or $9,990 a year (annual billing). Annual billing on the four main tiers saves up to 17%. The $29 Starter tier is new since early 2026 and did not exist when this page was last checked, it gives Ahrefs a genuine low-cost entry point it lacked before.
Ahrefs feature vs. Ahrefs metric: what is the difference?
An Ahrefs feature is a tool or workflow you actively use, while an Ahrefs metric is a number that tool produces. Site Explorer is a feature because it is a piece of software you open and interact with. Domain Rating is a metric because it is a score Site Explorer calculates and displays. Keeping the two separate matters because a feature can improve (a faster crawl, a new report) without the underlying metric's formula changing at all, and a metric can be recalibrated (as Domain Rating was in September 2025) without any feature being added or removed.
This guide covers Ahrefs' features first, then its metrics, then the API that exposes both to developers, so each concept can be checked on its own terms.
| Ahrefs feature | Metric(s) it produces |
|---|---|
| Site Explorer | Domain Rating, URL Rating, referring domains |
| Keywords Explorer | Keyword Difficulty, Traffic Potential, search volume |
| Rank Tracker | Average position, share of voice |
| Site Audit | Health Score |
| Content Explorer | Organic traffic estimate, referring domains |
Start with your question
Which Ahrefs feature answers your question?
Pick what you want to find out. Each answer is the opening line of the section that covers it.
Site Explorer
Ahrefs Site Explorer is a domain and URL analysis tool that shows a site's backlink profile, referring domains, organic keyword rankings, and estimated traffic in one dashboard.
Read the Site Explorer sectionAhrefs' core research tools
Ahrefs organizes most of its value around five tools that appear on every paid plan starting at Lite: Site Explorer, Keywords Explorer, Rank Tracker, Site Audit, and Content Explorer. Each one answers a different question about a domain, a keyword set, or a page.
Site Explorer
Ahrefs Site Explorer is a domain and URL analysis tool that shows a site's backlink profile, referring domains, organic keyword rankings, and estimated traffic in one dashboard. Enter a domain, subdomain, or exact URL and Site Explorer returns:
- Backlinks gained and lost over a chosen date range
- Top organic pages by estimated traffic
- Paid keyword activity where Ahrefs has data
- A Backlinks report filterable by dofollow, nofollow, UGC, or sponsored link type, and by referring domain traffic or Domain Rating
That filtering is what makes the report useful for prioritizing outreach or spotting a toxic link pattern rather than just eyeballing a raw backlink count.
Site Explorer's paid search visibility (the Ads Position History and Paid Keywords data) is a secondary feature built on the same crawl, not a dedicated PPC platform, so treat it as a directional signal rather than a full ad-intelligence source. Search Atlas covers the same domain-level job through its own Site Explorer, which layers a traffic-weighted Domain Power score and Holistic SEO pillar scoring (Experience, Authority, Content, Technical) on top of the backlink and keyword data, rather than reporting link-graph size alone.
Keywords Explorer
Ahrefs Keywords Explorer is a keyword research tool that returns search volume, keyword difficulty, traffic potential, and SERP data for any seed keyword. It draws from Ahrefs' Keyword Index, which the company reports at 28.7 billion filtered keywords across 217 locations as of its most recent published figures. Keywords Explorer clusters related terms by SERP overlap, shows a position history chart for tracked terms, and includes a parent topic suggestion meant to group near-duplicate queries under one target page.
The tool's keyword difficulty score is calculated from the backlink profiles of ranking pages, not from content quality, search intent, or SERP feature competition, so a low-difficulty score does not guarantee an easy ranking if the query triggers a featured snippet or an AI Overview instead of ten blue links. Rank Tracker and Standard-tier keyword-tracking caps (2,000 tracked keywords on Standard, up from 750 on Lite) limit how much of that research can be monitored continuously without upgrading.
Rank Tracker
Ahrefs Rank Tracker is a position-monitoring feature that tracks keyword rankings across locations, devices, and search engines over time. It reports share of voice, average position, and SERP feature ownership (featured snippets, sitelinks, image packs), and its Competitors Overview compares up to ten rival domains against the same keyword set.
Tracked-keyword caps scale by plan:
- Lite ($129/mo): 750 keywords
- Standard ($249/mo): 2,000 keywords
- Advanced ($449/mo): 5,000 keywords
- Enterprise: negotiated per contract, no published cap
Unlimited keyword tracking is not available on any standard tier. Position data also updates on a schedule tied to plan tier rather than in real time, so a volatile SERP can shift between refreshes without Rank Tracker catching the movement immediately.
Site Audit
Ahrefs Site Audit is a technical SEO crawler that identifies crawl errors, broken links, page speed issues, and on-page problems across a site, then scores overall site health. It covers JavaScript rendering for modern frameworks, lets teams customize which of its issue checks count toward the health score, and includes newer additions such as Always-on Audits (continuous background crawling instead of manual re-runs) and direct IndexNow submission from the URL details panel.
Site Audit finds and categorizes issues, it does not fix them. Every flagged problem, from a missing meta description to a broken internal link, still requires a person or a separate system to make the change. This is the clearest capability gap against Search Atlas's OTTO SEO, which crawls a site the same way but deploys the fixes it covers automatically through a lightweight JavaScript layer once approved, with every change logged and reversible, so the audit and the correction happen inside one loop instead of two separate steps. For a full side-by-side of that difference and others, see how Search Atlas compares to Ahrefs.
Content Explorer
Ahrefs Content Explorer is a content discovery tool that searches a database of hundreds of millions of pages to surface content that has earned backlinks, social shares, or organic traffic on a given topic. It is useful for finding link-building targets, spotting content gaps where a topic is under-covered, and identifying sites that publish frequently on a subject for outreach. Content Explorer does not include a writing feature of its own, it is research only, so turning what it finds into a published page happens in a separate tool.
The metrics behind Ahrefs' tools
Every Ahrefs feature above produces one or more of a small set of core metrics. Understanding what each metric measures, and what it does not, matters more than memorizing which report it appears in.
What is Ahrefs Domain Rating?
Domain Rating (DR) is a 0-to-100, log-scaled score that estimates the strength of a website's overall backlink profile relative to other sites in Ahrefs' index. It is not a Google ranking factor, Google has never confirmed using anything like it, DR is Ahrefs' own proprietary estimate of link authority. DR is calculated from the quantity and quality of referring domains linking to a site, weighted so that a link from a high-DR domain counts more than a link from a low-DR one, and scaled logarithmically so the gap between DR 20 and DR 30 is much smaller in real link-equity terms than the gap between DR 80 and DR 90.
Ahrefs recalibrated the Domain Rating and URL Rating algorithm in late September 2025, reducing the influence of low-quality referring domains, tightening the distinction between dofollow, nofollow, UGC, and sponsored links, and adding stricter filters for manipulative linking patterns. Many sites saw DR drop, in some reported cases by several points overnight, without any actual change to their backlink profile, purely because the underlying scoring model shifted. Anyone comparing a current DR figure against a screenshot or report from before that update is not comparing like for like.
What is a referring domain in Ahrefs?
A referring domain is a unique website that links to a given page or domain at least once, counted once regardless of how many individual links it sends. A site with 500 backlinks from 10 referring domains has a much weaker, more concentrated link profile than a site with 500 backlinks from 400 referring domains, because search engines and Ahrefs' own DR model both treat domain diversity as a stronger authority signal than raw link count. Ahrefs' Backlink Index currently reports 35.0 trillion external backlink records and 493.9 billion indexed pages, refreshed on an ongoing crawl cycle rather than a fixed daily batch.
What is Ahrefs Keyword Difficulty?
Keyword Difficulty (KD) is a 0-to-100 score that estimates how hard it would be to rank on page one for a given search query, based on the backlink profiles of the pages currently ranking. KD does not factor in search intent, content quality, or SERP features like AI Overviews, featured snippets, or shopping carousels that can make a "low difficulty" keyword far harder to win in practice than the number suggests.
What is Ahrefs Traffic Potential?
Traffic Potential is a metric that estimates the total organic traffic the current top-ranking page for a keyword receives across every query it ranks for, not just the seed keyword itself. A page ranking first for "email marketing tips" might also rank for dozens of related long-tail queries, and Traffic Potential sums the estimated traffic from all of them, giving a more realistic picture of a keyword's real opportunity than search volume alone.
Ahrefs' AI and brand-visibility features
Two newer feature areas, AI content tools and AI-answer visibility tracking, have expanded the most in Ahrefs' platform over the past year.
AI Content Helper and AI Content Grader
Ahrefs AI Content Helper is a content optimization feature that scores a draft against top-ranking competitor pages and suggests missing subtopics, headings, and terms while writing. It works inside Ahrefs' editor and covers keyword-intent detection and E-E-A-T-aligned content checks across more than 170 languages. Ahrefs AI Content Grader is a newer, lighter version of the same idea, a quick diagnostic that checks a piece of content's topic coverage against three page-one competitors rather than running the full editing workflow AI Content Helper provides. Both are separate paid add-ons layered on top of a standard Ahrefs subscription rather than features covered on every tier.
Brand Radar
Ahrefs Brand Radar is an AI-visibility feature that tracks how often a brand is mentioned or cited across AI answer engines, Google Search, and, as of a December 2025 expansion, YouTube, TikTok, and Reddit as well. The YouTube, TikTok, and Reddit tracking is in beta and available to all paid Ahrefs customers at no extra cost while it remains in that stage.
The bundled version tracks a small number of prompts by plan:
- Lite: 5 tracked prompts
- Standard: 10 tracked prompts
- Advanced: 20 tracked prompts
Standalone access is priced per product: the AI Visibility Index runs $199/mo, and Custom Prompts plans start at $50/mo or cost $699/mo for all models. YouTube, TikTok, and Reddit tracking is free while in beta.
Brand Radar is a genuinely useful signal for teams trying to understand AI-answer visibility, but it is scoped narrowly to mention tracking. It reports where a brand shows up, it does not diagnose why a page is missing from an AI Overview or ship a fix for the gap it finds.
Ahrefs' API and profile fields
The Ahrefs API is a programmatic access layer, currently on version 3 (API v3), that returns backlink, keyword, content, and traffic-estimation data as structured JSON rather than through the web dashboard. It is available starting on the Lite plan and above, and each plan comes with a monthly unit allowance rather than a fixed request count:
- Lite: 100,000 units/month
- Standard: 400,000 units/month
- Advanced: 1,000,000 units/month
- Enterprise: 2,000,000 units/month
Ahrefs' API bills by unit consumption, not by request count, which changes how teams should think about usage limits. Most endpoints charge units based on the number of rows and fields (profile fields such as Domain Rating, referring domains, or organic keywords) returned in a response, with a documented minimum of 50 units per unit-consuming call, so a request pulling many rows or a wide set of profile fields drains the allowance faster than a narrow one. Requests are also rate-limited to 60 per minute by default, with dynamic throttling that can reject calls beyond that even before the monthly unit cap is reached. Cached responses do not consume units, which rewards building a caching layer for any workflow that repeats the same query.
For teams building automated reporting or a custom dashboard, this unit-based structure means the real constraint is usually which profile fields get requested and how many rows come back per call, not simply how many times a script runs per day.
Ahrefs' add-on and workflow features
Beyond the five core tools, Ahrefs bundles a set of narrower features that cover specific workflows rather than standing alone as primary research tools.
Content Gap
Content Gap compares a domain's keyword footprint against one or more competitors and lists keywords the competitors rank for that the target domain does not, filterable by search volume and by how many competitors rank for each term.
Domain Comparison
Domain Comparison benchmarks multiple domains at once, combining Ahrefs Portfolios (aggregated trends across up to 10 tracked domains), the Organic Competitors report, and Batch Analysis into one comparative view.
Batch Analysis
Batch Analysis pulls domain-level and page-level metrics, Domain Rating, referring domains, backlink counts, for up to 200 URLs in a single bulk request. That's faster for large-scale audits than checking domains one at a time, but it still consumes API-equivalent credits on lower tiers.
A handful of smaller add-ons round out the set:
- Ahrefs Alerts notifies on new backlinks, meaningful ranking shifts, or a tracked competitor gaining link equity, monitoring specific domains, keywords, or brand mentions on a schedule tied to plan tier.
- Ahrefs Web Analytics is a separate, privacy-focused analytics product on a lightweight, cookie-free script, free for up to one million monthly events on a verified site. It covers real-time visitor behavior, outbound link clicks, and AI-bot visit detection from crawlers like GPTBot and PerplexityBot, a feature area that barely existed in Ahrefs' product two years ago.
- Ahrefs SEO Toolbar is a free browser extension showing Domain Rating, backlink counts, and indexability status for any page while browsing.
- PPC intelligence features surface competitor paid keywords and estimated ad spend, with accuracy limitations users regularly flag since Ahrefs models this from organic crawl data rather than direct ad-platform access.
- Enterprise-tier features add single sign-on, expanded API access, audit logs, and dedicated account management for larger teams managing multiple domains at scale.
For teams weighing Ahrefs against a lighter, crawler-only tool, Ahrefs vs. Screaming Frog covers that comparison directly, and Ahrefs vs. Majestic breaks down the backlink-index-only alternative.
How current is Ahrefs' data?
Ahrefs' organic traffic and keyword-volume estimates are directional, not exact, and independent testing has found meaningful gaps against real data. A widely cited AuthorityHacker study found Ahrefs' traffic estimates carried an average discrepancy of roughly 22.5% against actual Google Search Console data, with search volume estimates landing close to accurate for around 60% of tested keywords. Earlier third-party comparisons found larger swings, with some traffic estimates missing real figures by up to 50%.
This gap exists because Ahrefs models search volume and traffic from clickstream panels and its own crawl data rather than pulling directly from Google, the same limitation every third-party SEO platform shares to varying degrees. Ahrefs' underlying infrastructure crawls fast: AhrefsBot processes roughly 5 million page fetches per minute, the Backlink Index refreshes continuously rather than on a fixed daily cycle, and the Content Index discovers about 10 million new pages and updates roughly 300 million existing ones every 24 hours. Fast crawling narrows the estimation gap but does not close it, so directional trend data (is a keyword's difficulty rising, is a competitor gaining referring domains) remains more reliable than any single absolute number pulled from the platform.
Where Ahrefs' features stop and execution starts
Ahrefs' entire feature set is built for research and diagnosis: it finds backlinks, surfaces keywords, flags technical issues, and tracks AI-answer mentions, but the action on what it finds happens outside the platform. Site Audit lists a broken canonical tag, Content Gap lists a missing keyword, Brand Radar lists a missing AI citation, and in every case a person or a separate system still has to make the fix, write the page, or run the outreach.
That gap is where Search Atlas's approach differs in a specific, verifiable way rather than a general one. OTTO SEO deploys the technical fixes it covers automatically once approved, without a developer editing CMS templates, and every change stays reversible through a rollback log. That is not a claim that Search Atlas's research depth beats Ahrefs' backlink index or keyword database, both platforms draw from genuinely large, independently built datasets. It is a difference in what happens after the data comes back. For the fuller picture on pricing, plan limits, and where each platform fits a given team, Part 1 of this review covers the verdict and Part 3 covers Reddit feedback and the complete Search Atlas comparison.
More Ahrefs features worth knowing
A handful of narrower Ahrefs features round out the platform without needing a full walkthrough each:
- Broken Link Building works through the Broken Links and Best by Links reports inside Site Explorer, surfacing 404 pages and their referring domains so a team can pitch a replacement link to whoever is still linking to the dead page.
- Internal Linking Suggestions, generated from a Site Audit crawl, analyzes the top keywords each page ranks for and recommends where to add internal links using contextually matched anchor text.
- Ahrefs AI Detector scans text and flags sections that read as AI-generated, then offers a rewrite pass aimed at sounding more human, a response to rising concern over AI-content penalties and E-E-A-T scrutiny.
- Historical Keyword Ranking Tracking, available through both Site Explorer and Rank Tracker, plots how a domain's keyword positions moved over time against specific content or technical changes.
- URL Details Panel centralizes every Site Audit finding, crawl errors, structured data problems, hreflang issues, and historical page snapshots, for one specific URL, including a direct IndexNow submission option for faster reindexing after a fix ships.
- Custom Filters and Presets let users save frequently used search criteria across Ahrefs' reports, cutting down repetitive setup on recurring audits or competitor checks.
📚 Continue Reading the Ahrefs Series
← Part 1: Ahrefs Main Review, Overview, pricing breakdown, executive summary
→ Part 3: Ahrefs Cons & Better Alternatives, Reddit user feedback, customer support issues, Search Atlas detailed comparison, and 15+ FAQ answers
