The 15 Best Backlink Checker Tools, Explained in Full

Run your domain through three backlink checkers this afternoon and you will get three different answers, and not slightly different ones. One might report 4,200 referring domains, another 3,100, a third 5,800. None is lying. There is no single true backlink count, because every tool crawls the web with its own crawler and maintains its own index, so coverage, freshness, and even the definition of a live link differ between platforms. Once you accept that, the category becomes easy to navigate: you stop hunting for the tool with the "right" number and start picking the one that fits the job in front of you.

The fifteen tools below are the ones working SEOs actually reach for, chosen to cover every real job rather than to pad a list: seeing your own links completely, researching competitors, finding link opportunities, catching links that quietly disappear, judging a prospect in one second, and protecting your profile. Each entry explains what the tool does, who it suits, where it is strong, where it falls short, when it launched, and what it costs. If you want the wider picture of outreach and digital PR alongside link data, our guide to off-page SEO tools covers it.

The free-data cap nobody mentions. Google Search Console is the most authoritative free backlink source there is, because it reports what the search engine itself recorded. But its links report shows your top linking sites, not all of them, and once your profile grows past that ceiling you are reading a truncated view with no warning that data is missing. For a site with two hundred referring domains this is irrelevant; for one with five thousand you are deciding on a sample. That is the exact moment a paid database stops being a luxury. And judge any tool less by its headline index size (the leaders now advertise 35 trillion-plus links, a self-reported, unaudited number) than by how fast it finds a link you know exists and how reliably it tells you when one disappears. Run that test yourself during a trial.

1. Google Search Console Links report (start here, free)

This is the correct starting point for your own site and the right tiebreaker when two paid tools disagree, because it is the only backlink data that comes from the source rather than an estimate. It reports your top linking sites, your most-linked pages, and your most common anchor text, straight from Google's own records. The limitations are scope and completeness: it only covers domains you can verify ownership of, so you cannot research a competitor here, and as noted above it is sampled and capped rather than exhaustive. Read it before spending a penny, then reach for a paid database only when you outgrow it. Pair it with our website audit tools guide for the wider site-health check.

Best for: a free, authoritative view of your own link profile  ·  Launched: 2015  ·  Pricing: Free

2. Ahrefs (best overall backlink database)

Ahrefs began life as a backlink tool, and for link work specifically it is still the practitioner's default. It runs its own continuously updated crawler, its index refreshes very quickly for newly discovered links, and its Link Intersect report (the domains linking to several competitors but not to you) is the cleanest prospecting workflow in the category. Its Domain Rating metric has become an industry shorthand for link strength. The honest trade-offs are price and the recent shift away from a traditional free trial: paid access now starts at a higher tier, though a lower-cost Starter plan has been added, and the deepest data still sits behind the top plans. If link building is your main activity, this is the one to build around. To check whether new links actually moved anything, pair it with our keyword rank checker tools guide.

Best for: serious backlink research and competitor link analysis  ·  Launched: 2011  ·  Pricing: From $129/mo (plus a $29/mo Starter plan)

3. Semrush (best all-in-one, with outreach built in)

Semrush reports one of the largest indexes and wins when you want a single platform covering keyword research, content, paid search, and links together rather than a link specialist. Its Backlink Analytics, Backlink Gap, and Backlink Audit modules cover research, opportunity-finding, and toxicity in one place, and its Link Building Tool adds outreach sending that Ahrefs does not offer, so you can go from finding a prospect to emailing them without switching apps. The trade-off is that the link index, while strong, is not the platform's single sharpest feature, and the entry price sits at the higher end. If you need breadth across marketing rather than link depth alone, this is the pick. Our guide to off-page SEO tools covers the outreach side in more detail.

Best for: teams wanting links plus a full marketing suite and outreach  ·  Launched: 2008  ·  Pricing: From $139.95/mo

4. Majestic (best dedicated link index)

Majestic does one thing and has done it since 2004: maintain a large, independent link index with no keyword or rank-tracking distractions. Its signature metrics, Trust Flow and Citation Flow, remain trusted shorthand for link quality versus link quantity, and its split of a Fresh index (recently crawled) and a Historic index (everything ever seen) is genuinely useful for spotting links that have decayed. It is a specialist, so it lacks the surrounding keyword and content tooling of the suites, and its interface feels more utilitarian than the newer platforms. For pure link analysis at a lower price than the all-in-ones, it is a long-standing, respected choice.

Best for: focused link analysis with Trust Flow and Citation Flow  ·  Launched: 2004  ·  Pricing: From $49.99/mo

5. Moz Link Explorer (best for a usable free tier)

Moz created the original Domain Authority metric, and Link Explorer remains a solid way to check a link profile, compare domains, and read a Spam Score, with the advantage of a small monthly allowance of free queries that makes it handy for occasional competitor spot-checks without a subscription. Its Link Intersect and discovered-and-lost views cover the core jobs. The trade-off is index size and refresh speed: Moz's crawler is smaller and slower to update than the market leaders, so treat its counts as directional rather than definitive. As an affordable entry point or a free second opinion, it earns its place.

Best for: affordable checks and a genuine free query allowance  ·  Launched: 2008  ·  Pricing: Free / from $99/mo

6. Ahrefs Webmaster Tools (best free tool for your own site)

This is the most generous free offer in the market, and it deserves a separate mention from paid Ahrefs because it is a distinct product. Verify your domain, the same way you would with Search Console, and you get the full backlink profile for your own site drawn from Ahrefs' index, plus an unrestricted site audit, at no cost. That combination gives a small site owner a near-complete view of their own links without paying anything. The deliberate limitation is that it only works for domains you own and verify: you cannot enter a competitor's domain here, and the wider Site Explorer data is capped, which is where the paid plans begin. For monitoring your own profile for free, nothing else comes close.

Best for: a complete, free backlink profile of your own verified site  ·  Launched: 2020  ·  Pricing: Free

7. Mangools LinkMiner (best budget checker)

LinkMiner, part of the affordable Mangools suite, is the friendliest way into paid backlink data for solo bloggers and small businesses. It scores link strength, filters by attribute, and (its nicest touch) previews the link in the context of the page hosting it, so you can judge quality without opening a dozen tabs. As part of a bundle it also brings keyword research and rank tracking, which stretches a small budget further. Its index is smaller than the leaders and its data less exhaustive, so it suits spot analysis and small-site work rather than enterprise competitor research. For the price, it covers the everyday link-checking job well.

Best for: affordable link checking for solo owners and small teams  ·  Launched: 2016  ·  Pricing: From $29/mo

8. Ahrefs SEO Toolbar (best browser extension for fast triage)

Extensions are what SEOs actually use most often, and this free one is the fastest way to judge a prospect without opening a platform. Land on any page and it shows Domain Rating, backlink and referring-domain counts, and highlights the outbound link attributes on the page, so you can tell in a second whether a domain is worth pitching and whether its links pass value. MozBar does a similar job with Moz's authority metrics if you prefer that ecosystem. The limitation is inherent to the format: an extension is for quick reads, not deep analysis, and each one you install makes network requests on the pages you visit, so keep it to three at most. As an instant quality gauge, it is indispensable.

Best for: one-second prospect quality checks while browsing  ·  Launched: 2018  ·  Pricing: Free

9. Linkody (best affordable monitoring and lost-link alerts)

Earning a link is the hard part; keeping it is the part nobody watches. Pages get rewritten, sites redesigned, editors clean up outbound links, and a link you worked weeks to earn can vanish with no notification. Linkody checks your known backlinks on a schedule and emails you when one changes status or disappears, giving you a window to contact the site owner while the relationship is warm and the removal was probably accidental. It also handles competitor tracking and tidy client reports at a low price. It is a monitoring specialist rather than a research database, so pair it with one of the indexes above. Relative to the value it protects, this is the cheapest and most-skipped category here.

Best for: automated lost-link alerts on the links you already have  ·  Launched: 2014  ·  Pricing: From $14.90/mo

10. LinkResearchTools (best for audits and disavow diagnosis)

LinkResearchTools aggregates more than twenty link data sources into one combined profile, which makes it the specialist's choice for penalty recovery and deep audits where seeing every possible link matters. Its Link Detox risk classification is built for the narrow but serious cases: a manual action, a history of purchased links, or an inherited domain with an unknown past. A caution that applies to this whole job, though: search engines say they ignore most spam links automatically, and disavowing aggressively can remove links that were quietly helping you, so use the risk scores to investigate by hand, never to bulk-disavow. It is expensive and aimed at professionals, which is exactly who needs it. The wider infrastructure side sits in our technical SEO tools guide.

Best for: multi-source audits and penalty/disavow diagnosis  ·  Launched: 2009  ·  Pricing: From $329/mo

11. Netpeak Checker (best bulk domain metrics checker)

When you have a list of four hundred prospect domains and need to know which are worth a pitch, checking them one by one wastes a day. Netpeak Checker takes the whole list at once and returns authority scores, referring-domain counts, and spam indicators from several data providers in a single pass, turning an undifferentiated list into a ranked shortlist in minutes. This bulk triage is one of the highest-leverage moves in outreach. The important caveat is that authority scores are third-party estimates invented by tool vendors, not search-engine ranking factors, so use them to sort and filter, never as the final word. Clean your list first with a duplicate line remover to avoid wasting credits on repeats.

Best for: ranking large prospect lists by authority in one pass  ·  Launched: 2015  ·  Pricing: From $23/mo

12. BuzzStream (best outreach CRM with built-in metrics)

A backlink checker finds the opportunity; a link-building CRM helps you pursue it. BuzzStream is a relationship-first outreach platform that enriches your prospect list with link metrics and discovers contact details, so you can filter a thousand targets by authority before writing a single email, then track conversations and follow-ups in one place. Its relationship-led philosophy suits genuine, considered outreach rather than high-volume automated blasting; use a volume tool for relationship building and you produce exactly the generic pitches everyone ignores. It is not a link database, so it sits downstream of the tools above. For the sending side, our guide to AI email tools and Chrome extensions pairs well with it.

Best for: relationship-led outreach with link metrics attached  ·  Launched: 2010  ·  Pricing: From $29/mo

13. DataForSEO Backlinks API (best developer data source)

If you are building dashboards, enriching a database, or running checks across thousands of domains, the interface is the wrong product and an API is the right one. DataForSEO provides raw referring-domain and anchor data priced per request rather than per seat, which is dramatically cheaper when you only need numbers flowing into a system, and it is the route agencies take to put live link metrics into client reports without buying everyone a login. The trade-off is that it is a developer tool: you build the reporting layer yourself, and credit models differ enormously between providers, so read the per-request pricing carefully before you scale. When parsing responses by hand, our free JSON formatter makes them readable in a click.

Best for: developers piping link data into custom systems at scale  ·  Launched: 2016  ·  Pricing: Pay as you go

14. Screaming Frog SEO Spider (best for verifying placements)

A backlink a search engine has never crawled does nothing for you, yet placements routinely get published on pages nobody links to and sit there doing nothing while the report counts them as wins. Screaming Frog's list mode closes that loop: paste your placement URLs and it bulk-crawls them to confirm each link is live, returns a healthy status code, has no redirect in the way, and actually contains the link you were promised. It is the practitioner's standard for verification and for crawling location and content pages generally. Being a desktop crawler, it has a learning curve and is not a backlink database, so it complements the indexes rather than replacing them. Run it before you count any placement as delivered.

Best for: verifying that earned links are live, clean, and indexed  ·  Launched: 2010  ·  Pricing: Free / from £199/yr

15. AgencyAnalytics (best for agency backlink reporting)

At scale the question stops being "what links do we have" and becomes "can I prove this month's work to a client without spending a day in spreadsheets." AgencyAnalytics pulls live backlink data alongside rankings, traffic, and reviews into automated, branded reports delivered on a schedule, which removes hours of manual assembly every month and is the layer clients actually judge you on. It is a reporting platform rather than a link source, so it sits on top of the databases you already pay for. A single-site owner does not need it, but for an agency the reporting layer alone often justifies the cost. Teams scripting their own workflows should also look at our SEO automation tools guide.

Best for: automated, white-label client reporting  ·  Launched: 2010  ·  Pricing: From $79/mo

Quick comparison

Pricing reflects publicly listed entry plans at the time of writing, and this category re-prices often. Several platforms changed their plans and credit models during 2026, and enterprise tiers quote only on request. Treat every figure as a shopping guide, not a quote, and confirm the current plan before you buy.

How to choose from these fifteen

Match the tool to your one real gap rather than buying the biggest database first. Start free and stay free longer than most articles suggest: verify your site in Search Console and Ahrefs Webmaster Tools for a complete, authoritative view of your own profile, add the Ahrefs SEO Toolbar for quick prospect reads, and use Moz Link Explorer's free queries for the occasional competitor spot-check. The moment you find yourself repeatedly wanting a rival's full link profile, that is the signal to pay for a database, and not before, in which case choose Ahrefs if link building is your focus or Semrush if you need breadth and built-in outreach. Layer in Linkody so you never quietly lose a hard-won link, and reach for LinkResearchTools only in the narrow cases that genuinely warrant an audit. Remember that measurement is not the fix: relevance beats raw authority almost every time, and the internal linking you fully control is covered in our guide to on-page SEO tools.

Frequently asked questions

What is a backlink checker tool?

A backlink checker shows which pages across the web link to a given domain or URL. It typically reports the number of backlinks, the number of unique referring domains, an authority estimate for each linking site, the anchor text used, whether the link passes value or carries a nofollow-style attribute, and when it was first discovered; better tools also track whether each link is still live. The category spans web platforms, desktop software, browser extensions, CMS plugins, and APIs, all drawing on a relatively small number of underlying link databases.

What is the best free backlink checker?

For your own site, Search Console paired with Ahrefs Webmaster Tools. Search Console shows the links the search engine actually recorded, and Ahrefs Webmaster Tools gives verified owners a genuine backlink profile from a major index at no cost, which is the most generous free offer in this market. Add Bing Webmaster Tools for a second first-party view. For domains you do not own, the free tiers of Ahrefs, Semrush, Moz, and Majestic each show a capped sample, usually the top hundred or so links, which is enough for a quick quality judgment on a prospect.

Why do backlink checkers show different numbers?

Because each one runs its own crawler and index, discovering different links at different times and applying different rules about when a link counts as live. One tool may keep reporting a link for months after it vanished while another drops it within days. There is no single true count, only different measurements of the same web. Pick one platform as your consistent benchmark for tracking growth and ignore the absolute differences between tools.

Is Ahrefs or Semrush better for backlink checking?

For backlink work specifically, most practitioners choose Ahrefs: it began as a backlink tool, its index refreshes very quickly, and its link intersect report is the cleanest prospecting workflow available. Semrush reports a larger total index and wins when you want one platform spanning keyword research, content, paid search, and links, and its link building tool includes outreach sending that Ahrefs does not. Entry pricing is similar. If link building is your main activity, choose Ahrefs; if you need an all-in-one marketing platform, choose Semrush.

What is the difference between backlinks and referring domains?

Backlinks count every individual link; referring domains count the unique websites those links come from. If one blog links to you forty times, that is forty backlinks from a single referring domain. Referring domains is by far the more meaningful metric, because the fortieth link from the same site adds very little compared with a first link from a new one. When comparing your profile against competitors, compare referring domains: a big backlink total built from a handful of sites is a much weaker profile than the headline suggests.

Can an AI assistant check my backlinks?

No. AI assistants have no backlink index and cannot crawl the web on demand, and asked directly they will sometimes produce plausible-looking numbers that are simply invented. Where they genuinely help is interpretation: paste an exported report and an assistant will summarise the anchor distribution, group referring domains by type, flag patterns worth investigating, and draft the outreach email. Use real tools for the data and an assistant for turning a thousand rows into a decision. For grouping messy anchor exports, our free text sorter helps, and you can browse the full library of guides or our free online tools for adjacent tasks.

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