Top 8 Backlink Checker Tools for 2026 (Free & Paid, Tested)

Every backlink checker will happily tell you a number. The hard part is knowing whether that number means anything — and whether the tool that produced it is the right one for the job you are actually doing.

Backlinks still separate page one from page two. In Backlinko's study of 11.8 million Google results, the #1 result had 3.8× more backlinks than positions 2–10. And links do not stay put: Ahrefs sampled 2,062,173 websites and found that 66.5% of the links pointing to them since 2013 have rotted away. A backlink checker is how you find out what you have, what you lost, and what your competitors have that you do not.

I tested the 8 best backlink checker tools for 2026 — free and paid — on the things that decide a real decision: how big and how fresh the index is, which authority metric it speaks, whether it tracks new and lost links, whether it flags toxic ones, and exactly how much you get before the paywall. Every price below was read from the vendor's own pricing page in August 2026, and where I could not verify something first-hand, I say so instead of guessing.

Those four numbers frame the whole category. Links correlate with rankings, so you need to measure them. Links rot, so a one-off snapshot ages badly. Link authority now correlates with being cited in AI answers too (Pearson 0.65 across 1,000 domains), so the stakes went up in 2026. And Ahrefs' own disavow experiment cost one page about 18% of its search traffic in the first month — which is the best argument going for not trusting any single toxicity score blindly.

How we tested and chose these tools

There are dozens of backlink checkers. Every tool below was judged on the same seven things:

• Index size and freshness. How many links the vendor claims to know about — and, more importantly, how often that index is refreshed.
• Authority metric and scale. Which score it reports, on what scale, and whether that score is the one your market speaks.
• New and lost link tracking. Can it tell you what changed, or only what exists today?
• Toxicity and disavow. Does it flag risky links, and can it build a disavow file?
• Competitor analysis. Link gap, link intersect, or nothing at all.
• The free tier ceiling. How many rows you actually see before the paywall — and whether you need an account to see any.
• Honest price. The real entry price today, monthly and annual, not the number a two-year-old listicle remembers.

The 8 best backlink checker tools at a glance

Most comparison articles publish a table of prices. The two columns that actually decide your choice — which authority metric the tool speaks and what the free tier really gives you — are the two nobody prints. So they lead here.

And the capability matrix — the yes/no questions that eliminate a tool before price ever enters the conversation:

The 8 best backlink checker tools, ranked

1. UNmiss Backlink Analyzer: Best Free Profile Check With No Signup (Our Pick)

Most free backlink checkers show you three numbers and a "sign up to see the rest" wall. UNmiss shows you the profile.

Type a domain and you get 12 profile metrics in one screen: total backlinks, referring domains, referring IPs, referring subnets, the dofollow/nofollow split, Domain Trust, plus .edu and .gov link counts, homepage links, text-vs-image links, unique anchors and how many of your own pages carry links. No account, no email, no card. The data is live from SE Ranking's commercial link index — the same paid dataset behind the rest of the platform.

That sample-size line is the detail I would point to first. Every free backlink checker limits how many rows it returns; almost none of them tell you. UNmiss puts "Showing 50 of 5,920,989" directly above the table, so you always know the difference between the profile and your slice of it.

The table itself gives you the referring page and its parent domain, an authority score with a visual bar, the anchor text, whether the link is dofollow or nofollow, which of your URLs it points at, and the date the link was first seen. You can sort by authority, copy every URL to the clipboard, or export to CSV — all free.

Below the table sit four distribution panels that turn a list into a diagnosis: top anchor texts, most-linked pages, referring TLDs and referring countries. This is where you spot an over-optimised anchor profile, a single page hoarding all the equity, or a link profile that is 90% one country.

Two honesty details worth naming, because they are the reason to trust the rest. The Domain Trust score is labelled as SE Ranking's InLink Rank on a 0–100 scale, with an explicit warning that it is not Moz DA or Ahrefs DR and should not be compared across tools. And when the index has nothing for a field, the tool prints "no data" rather than a zero that looks like a measurement.

Best for: anyone who wants a fast, honest read on any domain's link profile without creating an account.

Not best for: ongoing link monitoring. If you need to know which links you gained or lost this week, or you need a disavow file, this is not the tool — buy one of the paid suites below.

Pricing: free, with 3 checks a day and 50 links per check. A UNmiss plan raises that to 10 checks a day and 100 links per check. The wider platform (audits, AI fixes, AI-search visibility) starts at $24/month.

2. Ahrefs: Best for Freshness and Prospecting Filters

Ahrefs is the tool most link builders reach for, and the reason is speed of data. You enter a domain, URL, subfolder or subdomain into Site Explorer and land on an overview carrying Domain Rating, Ahrefs Rank, referring domains and backlink counts. The Backlinks report then lists every linking page with its anchor, target URL, DR, UR and — unusually — an estimate of the organic traffic reaching the linking page itself. That single column changes how you prioritise outreach: a DR 80 link on a page nobody visits is worth less than a DR 50 link on a page with real readers.

The standout mechanic is Link Intersect, which turns a set of competitors into a ranked list of domains linking to them but not to you. Filters cover dofollow, nofollow, UGC and sponsored, DR bands, platform and link status, and each row has a "Show history" dropdown that replays when the link first appeared, changed or broke. Ahrefs states its backlink index is updated with fresh data every 15 minutes across 35 trillion external backlinks, 493 billion pages and 500 million domains.

Best for: serious link builders and agencies who need the freshest index and the deepest prospecting filters.

Not best for: anyone doing competitor backlink analysis on a small budget — real research starts at the $129/month Lite plan, and Starter's 200 monthly credits will not carry you.

Pricing: Starter $29/mo, Lite $129/mo, Standard $249/mo, Advanced $449/mo, Enterprise $1,499/mo. Ahrefs advertises up to 17% off on annual billing but does not print per-plan annual prices — check at checkout.

Try Ahrefs' free backlink checker →

3. Semrush: Best for Toxicity Cleanup and Link Gaps

Semrush publishes the largest index of the majors — more than 43 trillion backlinks and 390 million referring domains, refreshed at least hourly. Enter a domain in Backlink Analytics and you get an overview with Authority Score, total backlinks, referring domains and a dofollow split, then tabs for Backlinks, Referring Domains, Anchors, Referring IPs, Indexed Pages, Outbound Domains and Competitors.

The differentiator is Backlink Audit. It scores every link 0–100 for toxicity against 45+ documented toxic markers and builds a Google-ready disavow file at URL or domain level. Backlink Gap is the other one: it compares you against up to five competitors at once and sorts the result by authority and relevance. Authority Score itself blends link power, organic traffic and spam factors across eight weighted signals, which makes it a broader read than a pure link metric — for better and worse.

Best for: marketing teams who want backlink analysis, toxicity cleanup and a full SEO suite on a single bill.

Not best for: teams that only want backlink data — you are paying for a fifty-tool marketing suite whether or not you open the rest of it.

Pricing: SEO $139/mo ($117.33/mo annual), Starter $199/mo, Pro+ $299/mo, Advanced $549/mo. Free account: 1 project, 10 reports/day, no card.

Try Semrush's free backlink checker →

4. SE Ranking: Best Big Index With Monitoring Included

SE Ranking is the tool most often left out of these lists and most often deserving of a slot. You drop in a domain or URL, choose whether to include subdomains, and get an overview with Domain Trust, Page Trust, total backlinks, referring domains and the dofollow/nofollow split. The Backlink Checker grades each link against 15+ parameters — target URL, anchor, link type (text or image), HTTP status, domain and page trust — across Domains, Anchors, Pages, IPs/Subnets and Disavow tabs.

Two things set it apart. First, SE Ranking publishes a data-freshness figure almost nobody else does: 58% of backlinks updated every 90 days, against an index it describes as 2.9 trillion backlinks and 411 million referring domains. Second, Backlink Monitor is included rather than sold separately — you add the links you built by hand, by CSV, or by importing from Google Search Console, and it rechecks them weekly and emails you when one breaks. For an in-house team that builds links and needs to know when they die, that is the whole job in one plan.

Best for: agencies and in-house teams who want a big, fresh index plus link monitoring and disavow without paying Ahrefs or Semrush rates.

Not best for: solo bloggers and side projects — once the trial ends, $129/month is agency pricing.

Pricing: Core $129/mo ($103.20/mo annual), Growth $279/mo ($223.20/mo annual), Enterprise custom. 14-day trial, no card.

Visit SE Ranking →

5. Majestic: Best Link-Only Specialist

Majestic does links and nothing else, and it has done so since 2006. You enter a domain, URL or even a search phrase, and — uniquely — you pick Fresh Index or Historic Index before anything loads. Fresh is a rolling window of roughly four months; Historic reaches back nearly two decades. As of 6 August 2026 the live counters on Majestic's own page read 193.2 billion URLs crawled in the Fresh index and 4.5 trillion in Historic, with 614 billion and 21.7 trillion unique URLs found respectively.

Every row carries Trust Flow and Citation Flow, the oldest and most-cited two-axis authority model in the category. Citation Flow measures how much link equity points at a page; Trust Flow measures quality, derived from a human-curated seed set. The gap between them is the technique worth learning: a site with Citation Flow 60 and Trust Flow 8 has bought or spammed its way to volume. Majestic has no toxicity score, and it does not need one — that gap is the toxicity read. Topical Trust Flow then places each link in one of 800+ topic pools, so you can tell a relevant link from a merely powerful one.

Best for: link builders and forensic SEOs who want the deepest, longest-running link-only dataset at the lowest serious price.

Not best for: anyone wanting one platform for everything — you will still buy keyword research, rank tracking and site audit elsewhere.

Pricing: Lite $49.99/mo ($41.67 annual, 5,000 Site Explorer rows), Pro $99.99/mo ($83.33 annual, 30,000 rows), API $399.99/mo. No permanent free plan, but the demo profile, the first 5 rows of the Bulk Backlink Checker and the Majestic Million CSV all work with no login.

Try Majestic's free tools →

6. Moz Link Explorer: Best for Speaking Domain Authority

Moz earns its slot on a social fact rather than a technical one. Domain Authority is the metric outreach targets quote, guest-post sellers price by, and clients ask about — so even if you run your day-to-day analysis elsewhere, you will eventually need a DA number that came from Moz itself.

Link Explorer takes a domain, subdomain or exact page and returns Domain Authority, Page Authority and Spam Score alongside linking domains, inbound links, anchor text and top pages. Reports split into Discovered and Lost linking domains, so recent wins and silent losses sit side by side, and Link Intersect finds sites linking to several competitors but not to you. Spam Score is the genuinely differentiated piece: it reports the percentage of sites with similar features that were penalised, which is a native risk read that neither Ahrefs nor Majestic offers.

Best for: teams whose clients and outreach partners speak in Domain Authority and who want Spam Score risk checks.

Not best for: link prospecting at volume — the Starter plan's 75 queries a month runs out in a single afternoon of real research.

Pricing (third-party sourced): Starter $49/mo ($39 annual, 75 queries), Standard $99/mo ($79 annual, 5,000), Medium $179/mo ($143 annual, 20,000), Large $299/mo ($239 annual, 70,000). Free tier: 10 queries/month with an account.

Visit Moz Link Explorer →

7. Mangools LinkMiner: Best Budget Prospecting Interface

LinkMiner is the cheapest full backlink tool here and, for prospecting specifically, the fastest to read. Type a domain — or a URL pattern like example.com/blog/*, which no other tool on this list accepts — and you get a table with Link Strength, Citation Flow, Trust Flow, external link count, referring IPs and anchor text, tagged dofollow, nofollow or deleted. All / New / Lost tabs sit across the top, and a "one link per referring domain" toggle collapses site-wide noise into genuine opportunities.

The mechanic that earns it a slot is that preview pane. Click any row and the referring page renders on the right, auto-scrolled to the link with the anchor text ringed in orange. Judging a link in its actual page context, without opening a tab, is meaningfully faster than everything else here. You star prospects into a Favorites list as you scan, then export just the shortlist. The honest caveat: LinkMiner licenses Majestic's index rather than running its own crawler, so it is not an independent second opinion on a link profile — it is a better interface onto data you can also get from Majestic.

Best for: freelancers and small teams who want fast, readable link prospecting on the lowest possible budget.

Not best for: enterprise link forensics, or anyone who needs a second opinion independent of Majestic's crawler.

Pricing: Basic $30.50/mo ($18.85 annual, 100k rows), Premium $40.50/mo ($26.35 annual, 500k rows), Agency $70.50/mo ($48.85 annual, 1.2M rows). Annual billing is 35% off. The old $19.90 Entry plan no longer appears on the pricing page.

Visit Mangools LinkMiner →

8. Ubersuggest: Best Low-Cost Directional Check

Ubersuggest is the cheapest paid entry point here and the only tool on this list with a lifetime licence option. In the Link Building section you open Backlink Overview, enter a domain or URL, and toggle between Domain and URL mode. You get Domain Authority, total backlinks, referring domains and a trend graph you can hover for daily gains and losses. The Backlink List breaks each link into Domain Authority, Page Authority, Spam Score, link type, anchor text, source page title and First Seen / Last Seen dates.

Two real limits shape what this is good for. Backlink rows cap at 2,000 on the entry plan, 5,000 on Business and 10,000 on Enterprise — an order of magnitude below every rival here. And the new/lost window is only 30 days on every plan, Enterprise included. Ubersuggest also publishes no index size at all; its own FAQ says it uses "multiple data providers" for estimations. That is more honest than inventing a figure, but it means you cannot compare its coverage to anyone else's.

Best for: solo site owners and beginners who want directional backlink data at the lowest possible cost.

Not best for: serious link research — 2,000 rows and a 30-day change window will not support an audit.

Pricing: Individual $12/mo, Business $20/mo, Enterprise $40/mo as displayed, currently carrying a "Save 70%" promotional badge. A lifetime option exists but did not render prices when tested. Free account is permanent, with a handful of searches a day.

Visit Ubersuggest →

Where the paid tools genuinely beat us

Our tool is first on this list because it does one job — a fast, free, honest profile read — better than anything else that costs nothing. It is not first because it is the most capable tool here. It plainly is not, and pretending otherwise would waste your time.

Four things the paid suites do that the UNmiss Backlink Analyzer does not do at all:

• New and lost link tracking. Ahrefs, Semrush, SE Ranking, Moz, Mangools and Ubersuggest all tell you what changed. We show you a snapshot. If your job is knowing which links died this week, you need one of them.
• Toxicity scoring and disavow files. Semrush's 45-marker Toxicity Score, SE Ranking's toxicity panel and Moz's Spam Score have no equivalent here. We would rather ship nothing than ship a risk score we cannot stand behind.
• URL-level analysis and link intersect. We are domain-level only. Comparing three competitors to find the domains linking to all of them is a paid-tool job.
• Monitoring, alerts, saved history and an API. There is no dashboard, no email when a link breaks, no stored past check. Every run starts fresh.

There is also a scale reality. Ahrefs at 35 trillion backlinks, Semrush at 43 trillion and Majestic's 21.7-trillion historic archive are doing something a free tool does not attempt. And Ahrefs' 15-minute refresh cadence is a genuine engineering advantage over anything cached.

The honest recommendation: use the free check to answer "what does this profile look like right now?" — for your site, a prospect, a client pitch, an acquisition target. When the question becomes "what changed, and what should I disavow?", buy the paid tool that matches your budget.

Why two backlink checkers disagree about the same site

Run one domain through three tools and you will get three different backlink counts, sometimes off by an order of magnitude. This is the single most common reason people distrust the whole category, and it is worth understanding, because none of the tools is lying.

They crawl different webs. Every vendor runs its own crawler on its own budget and priorities. Ahrefs, Semrush, Majestic and SE Ranking each maintain independent indexes. Mangools LinkMiner licenses Majestic's, so LinkMiner and Majestic will broadly agree with each other and disagree with the rest — which makes them a poor pair to "cross-check" with. Ubersuggest licenses from unnamed providers and publishes no index size at all.

They define "a backlink" differently. Does a site-wide footer link on a 50,000-page site count as 50,000 backlinks or as one? Does an image link count? A redirected link? A link inside a canonicalised duplicate? Each vendor answers differently, and those answers alone can produce a tenfold gap on the same domain.

They forget at different speeds. When a link disappears, how long does it stay in the index? Majestic makes this explicit by splitting Fresh from Historic. Everyone else bakes a retention policy into one number, so a tool with a long memory reports a bigger profile than a tool with a short one — for the same site, on the same day.

They refresh at different cadences. Ahrefs claims fresh data every 15 minutes. Semrush says at least hourly. SE Ranking publishes 58% of backlinks updated every 90 days. A link earned yesterday may exist in one index and not another for weeks.

What to do about it: pick one tool as your system of record and track the trend inside it. A backlink count is only meaningful compared to the same tool's number last month, or to a competitor measured by the same tool on the same day. Comparing an Ahrefs DR to a Moz DA, or a Semrush total to a Majestic Fresh total, is comparing two different questions.

What a backlink checker actually does

A backlink checker queries a link index — a database built by a crawler that walks the web recording which pages link to which — and reports what it knows about the links pointing at a domain or URL you name.

That is worth stating plainly, because it explains both the power and the limits. The power: you can inspect any site's link profile, including competitors, without access to their analytics. The limit: you only ever see what that particular crawler found, on its particular schedule, under its particular definition of a link.

A good checker answers five questions:

• How many links, and from how many sites? Referring domains matters more than raw backlinks — 500 links from 5 sites is a much weaker profile than 500 links from 400 sites.
• How strong are the linking sites? This is what DR, DA, Authority Score, Trust Flow and Domain Trust each try to express, on scales that are not interchangeable.
• What do the links say? Anchor text distribution reveals both what you rank for and whether the profile looks manufactured.
• What changed? New and lost links over time — the question a snapshot cannot answer.
• What looks risky? Spam or toxicity signals, and whether anything needs disavowing.

Free vs paid backlink checkers

Free backlink checkers are genuinely useful, and they are genuinely limited, and it is worth being precise about which is which.

What free tools do well: profile-level metrics (totals, referring domains, follow split, authority score) are usually accurate, because they come from the same index the paid product uses. A free tool's summary numbers are typically the real numbers.

Where free tools stop: row counts. Almost every free checker returns a top slice — 50 rows here, 100 there, sometimes an unpublished cap. If a free tool shows you 50 links out of 5.9 million and does not say so, you can badly misread a profile. That is why a stated sample size matters more than a bigger cap.

A note on Google Search Console. GSC is free, uses Google's own data, and is the most authoritative source for links pointing at your site — but it cannot check anybody else's. Since competitor analysis is the core job of this category, GSC is a complement to a backlink checker, not one of them. Use it to validate what your paid tool tells you about your own profile, then use the paid tool for everything you do not own.

How to use a backlink checker: a 5-step workflow

1. Audit your own profile first. Run your domain and read the distributions before the list. Anchor text that is 60% exact-match, or a profile where referring IPs are a fraction of referring domains, tells you more than the headline count.
2. Find the competitor gap. Run your three closest competitors and look for domains linking to two or more of them and none to you. In Ahrefs this is Link Intersect, in Semrush it is Backlink Gap, in Moz it is Link Intersect. Those domains already link to sites like yours — they are the warmest prospects you will find.
3. Qualify before you pitch. Do not chase a link because the domain score is high. Check whether the linking page gets traffic (Ahrefs shows this directly), whether the topic is relevant (Majestic's Topical Trust Flow), and whether the site's Citation Flow wildly exceeds its Trust Flow.
4. Monitor new and lost. Given that two-thirds of links rot, the links you already earned are worth defending. A weekly lost-link alert often recovers more equity than a month of outreach.
5. Disavow last, and carefully. Ahrefs' own experiment cost a page 18% of its traffic in month one, and it recovered to 99% only after the disavow was lifted. Google handles most spam links on its own. Reserve disavow for links you know are the result of a negative-SEO attack or your own past paid-link buying.

The verdict: which backlink checker should you pick?

Pick the tool that matches the question you are actually asking.

If the question is "what does this profile look like right now?", start free with the UNmiss Backlink Analyzer — 12 metrics, 4 distributions and 50 live rows, no account. If it is "which links can I win from my competitors?", choose Ahrefs for the freshest index and the best filters. If it is "what should I clean up?", choose Semrush or SE Ranking for toxicity scoring and a disavow file — and SE Ranking if you also want link monitoring included. If it is "is this link genuinely trustworthy?", choose Majestic and read Trust Flow against Citation Flow. If it is "what DA will my outreach partner quote?", you need Moz. If it is "how do I prospect quickly on a small budget?", choose Mangools LinkMiner. And if the budget is the binding constraint, Ubersuggest gives you directional data for the price of a coffee.

The smart first move costs nothing: run your own domain, look at the anchor and country distributions rather than the headline count, and see whether your link profile actually looks like the profile of a site that deserves to rank.

This guide was written and tested by RH Fardin. Tool prices and free-tier limits were verified in August 2026 on each vendor's own pricing page — always confirm the current details on the tool's own site before you buy. Last updated August 2026.