Best Backlink Checker Tools in 2026 (Free and Paid, Compared)

You can't fix what you can't see. And when it comes to backlinks, flying blind means wasting months building links that don't move the needle while ignoring the ones that do.

I've been through this. Spent three months doing outreach for a client's site, feeling pretty good about it, then finally ran a proper backlink audit and realized half the links I was chasing were from domains with a DA of 8. Meanwhile the site had lost two genuinely good Wikipedia links and I hadn't noticed. That was an expensive lesson about checking your backlinks before you do anything else.

The problem is there are dozens of tools claiming to be the best. Prices range from free to $500/month. And the data quality varies wildly between them. I've spent years testing these across different sites - small business sites with 50 backlinks, large ecommerce stores with thousands - and I have opinions.

What actually matters when picking a backlink checker

Before I get into specific tools, here's what separates useful from useless:

Index size is the big one. How many pages and links does the tool's crawler know about? Bigger index means a more complete picture. Ahrefs and Semrush crawl billions of pages. Smaller tools straight-up miss links.

Data freshness matters more than people think. Some tools update daily, others lag weeks behind. If you're actively building links and your tool is showing you month-old data, what's even the point.

Referring domain count over total backlinks, always. One link from 100 sites beats 100 links from one site. Total backlinks is a vanity metric.

Then there's the usual stuff: link quality metrics (Domain Authority, Trust Flow, Authority Score - different names, same idea), competitor analysis capabilities, and whether you can actually export and filter the data. You'll need CSV exports and dofollow filters for real campaigns.

Revised Free Backlink Checker

I'm biased, obviously. But Revised's free backlink checker is genuinely where I'd start before spending money on anything.

No signup. No credit card. No "free trial" that conveniently expires before you've done anything useful. Plug in a domain and you get total backlinks, referring domains, dofollow ratio. The stuff that matters.

I use it constantly for quick-checking domains before outreach, vetting potential link partners, getting a snapshot of my own profile. The thing that bugs me about most free tools is the artificial limits - 3 searches per day, or they hide the good data behind a paywall. This one just... gives you the data.

It also ties into the Revised directory, where you can browse expired domains carrying contextual links from authoritative sources like Wikipedia, Reddit and Hacker News, each one spam-screened on its site history before it is listed. So once you've found gaps in your profile you have somewhere to look instead of cold-pitching strangers for months. More on that later.

Ahrefs

Starting at $129/month for Lite. They do have a free backlink checker but it's pretty limited.

Look, there's a reason Ahrefs is the default recommendation in every SEO community. Their crawler indexes roughly 493 billion pages with 35 trillion external backlinks from nearly 500 million domains. Data refreshes every 15-30 minutes. That's about as close to real-time as backlink data gets.

The Site Explorer is where I spend most of my time. Complete backlink profile for any domain - referring domains, anchor text distribution, new and lost links, dofollow vs nofollow. Link Intersect is probably my favorite feature anywhere though. Shows sites linking to your competitors but not to you. That's where the actual strategy happens, not in some generic "top 10 link building tactics" blog post.

Content Explorer is underrated too. Finds the most-linked content in your niche. Good for understanding what actually earns links vs. what you think should earn links. (These are often very different things.)

The downside. $129/month for Lite and you'll hit limits fast if you're running serious campaigns. Standard at $249/month adds historical data beyond 6 months. For agencies and in-house SEO teams living in this data daily, hard to beat. For a solo founder checking links once a week? Probably overkill. You're paying for a Ferrari to drive to the grocery store.

Semrush

$129.95/month for Pro. Limited free account available.

Semrush is a different animal. It's not really a backlink checker - it's an entire SEO toolkit with 55+ tools, and backlink analysis is one piece of that. Whether that's a good thing depends on what you need.

Backlink Analytics, Backlink Audit, Backlink Gap, Link Building tool. The names are self-explanatory. The Backlink Gap tool is particularly nice - compares your profile against up to five competitors at once, color-coded so you can spot opportunities fast. I used to do this manually in spreadsheets. Took hours. This takes seconds.

One thing Semrush has that Ahrefs doesn't: toxic backlink detection. The Backlink Audit tool identifies spammy links dragging your rankings down and recommends which to disavow. Had a client once whose rankings tanked after a negative SEO attack. Semrush flagged the toxic links within minutes. With Ahrefs I would've been eyeballing thousands of rows in a spreadsheet.

The recent Semrush One update added AI visibility tracking across ChatGPT, Google AI Overviews, Perplexity, and Gemini. Useful if you care about getting a new site visible in AI search. And honestly, you should.

The way I think about it: Semrush makes sense if you want one subscription covering keyword research, site audits, rank tracking AND backlinks. Most SEOs consider Ahrefs slightly better for pure link analysis. But most SEOs also end up subscribing to both at some point, trying them side by side for a few months, then canceling whichever one they use less. That's just how it goes.

Moz Link Explorer

From $49/month on the Starter plan. Free limited checks available.

Moz invented Domain Authority. That's kind of their whole thing. The metric the entire SEO industry uses as shorthand for "how strong is this site?" originated here.

Link Explorer gives you DA and Page Authority scores, Spam Score for flagging harmful backlinks, linking domains sorted by DA, anchor text analysis. It's solid. Not flashy. Solid.

The database is smaller than Ahrefs or Semrush. Moz doesn't crawl as many pages, so you will miss some links. I ran the same domain through all three tools last month. Ahrefs found 2,400 referring domains. Semrush found 2,100. Moz found about 1,600. That's a meaningful gap if you're trying to get a complete picture.

The $49/month entry point is the cheapest of the big three but you only get 75 backlink queries per month. That disappears fast. The Standard plan at $99/month is more realistic for anyone doing this regularly.

If Domain Authority is your primary metric for evaluating links - and for many people it is - Moz is the original source. Everyone else is reverse-engineering their own version.

Majestic

$49.99/month for Lite. Free limited checker.

Majestic does one thing. Just backlinks. No keyword research. No rank tracking. No site audits. Just links. I kind of respect that honestly.

Their proprietary metrics are what set them apart. Trust Flow measures link quality on a 0-100 scale. Citation Flow measures quantity. High Citation Flow with low Trust Flow? Spammy link profile. It's a quick gut check that I use all the time.

But the real gem is Topical Trust Flow. It categorizes your links by topic, which matters because a link from a relevant site in your niche carries way more weight than a random link from some unrelated domain. I've never seen another tool do this as well.

The Lite plan gets you the Fresh Index (updates several times daily). Pro at $99.99/month adds the Historic Index for seeing how profiles evolved over years.

Majestic is the tool I'd recommend for dedicated link builders and agencies who need depth that the all-in-one platforms don't provide. For everyone else, the lack of other SEO features makes it hard to justify as your only subscription. Good supplementary tool though.

Ubersuggest

Starts at $12/month. Lifetime deal available. Free tier gives you 3 checks per day.

Neil Patel's budget option. I'll be honest, I was skeptical of this one for a long time. Felt like a marketing play. But at $12/month it does more than it has any right to.

Total backlinks, referring domains, dofollow vs nofollow, domain score, historical data, new and lost links tracking. The basics are covered. The lifetime deal makes it even cheaper long-term if you trust that the product will stick around. (It's been around for years now so... probably fine.)

Trade-offs are real though. Smaller database, less granular data, no competitor gap analysis or toxic link detection. You're getting maybe 60% of what the premium tools offer for 10% of the price. For a small business owner or solo marketer who needs basic monitoring, the math works out. For anyone running serious campaigns, you'll outgrow it fast.

Three free checks per day is actually not bad for spot-checking domains during outreach.

Google Search Console

Free. Always. Forever.

Google Search Console is different from everything else on this list. It's not estimating your backlink data. It IS your backlink data. Straight from Google's index. What Google actually sees when it looks at your site.

The Links section shows top linking sites, top linked pages, and top linking text. That's it. No fancy metrics. No authority scores. Just: here's who links to you, here are your most-linked pages, here's what anchor text they're using.

Obvious limitation: your own site only. Can't check competitors. Caps at top 1,000 linking sites. If you have a massive profile you won't see the full picture.

But set this up first. Regardless of what paid tool you choose. Takes 15 minutes. The data complements everything else because every other tool on this list is trying to approximate what GSC gives you for free.

Quick comparison table

So which one?

Depends entirely on where you are.

Just starting out? Revised's free checker plus Google Search Console. That's it. Don't pay $129/month before you know what you're looking at. Seriously. I've seen people sign up for Ahrefs on day one, get overwhelmed by the dashboard, and cancel within a week. Get comfortable reading backlink data first.

Running active link building? Ahrefs if backlinks are your primary focus. Semrush if you want one subscription covering links plus keyword research, site audits, rank tracking. Both are good. Most SEOs try both and develop a preference. Mine changes depending on the project honestly.

Agency with multiple clients? Ahrefs or Semrush for the daily workflow. Majestic as a supplement when you need Trust Flow data for a deeper analysis.

Small business, tight budget? Ubersuggest at $12/month paired with the free tools (Revised checker + GSC). Solid low-cost stack that covers the basics.

Obsessed with link quality scoring specifically? Majestic's Trust Flow / Citation Flow framework is the most specialized tool for this. Moz if Domain Authority is your preferred metric.

The tool is only half the equation

Checking backlinks is step one. The harder part is building new ones.

You can spend months doing manual outreach. Cold emailing blog editors. Writing guest posts. Hoping someone notices your content and decides to link. That works, but it's slow and the rejection rate is brutal. I tracked my outreach response rates for six months once. 4.2%. Ninety-six percent of my emails went into the void.

Or you skip the prospecting. Revised catalogues expired domains that already carry links from trusted sources like Wikipedia, Reddit, Hacker News and major publications. You browse the directory, reveal the names that fit your niche, and register them yourself. No pitching. No relationship building. No waiting weeks for a maybe.

Using the Revised directory for this

Every tool above tells you what a profile looks like today. The directory is the other half: a list of domains whose profile already exists, published before the name is.

1. Open the directory. As of 16 September 2026 it holds roughly 11,000 expired domains available to register. Search, filters and every metric are free and need no account.
2. Set Category in Basics to your own niche, and a Referring domains floor of 10 in Quality. Ten distinct linking sites removes most of any list.
3. Set Spam signal to low. Every listing is spam-screened on its site history before it goes up, and 9,541 (84%) sit in the low band.
4. Start from a source hub to filter by who links in rather than how many do: Wikipedia (4,769 listings), .edu (108), .gov (42), or aged domains for names first seen five or more years ago.
5. Read Linked by and the archive timeline on the listing page before spending a reveal. That is the judgement none of the tools above make for you.
6. Verify a revealed name with the free backlink checker and the expired domain checker, then register it yourself at any registrar. We do not sell, hold or register the domains listed.

A domain's existing links are not rankings you inherit. They are pages that already point at a name, and what you publish on it decides whether that matters. What Google's expired domain policy allows sets out the line.

FAQ

What is the best free backlink checker? For a full list of referring domains with source pages and anchors on any domain, with no account and no query cap, ours. For what Google itself found on a site you own, Search Console. Use both: they answer different questions and neither substitutes for the other.

Why do backlink tools show completely different numbers? Because each one crawls a different slice of the web and counts differently. Semrush reports the largest index, Ahrefs filters harder, Search Console reports only what Google found. A 3x spread on the same domain is normal. Compare a tool against itself over time, not against another tool.

Is Ahrefs or Semrush better for backlinks? Ahrefs for link data specifically, Semrush if you want link data alongside keywords, ads and site audit in one subscription. At $129 a month each the real question is whether you need either yet. How to check any site's backlinks for free compares the free routes first.

Can I check a competitor's backlinks? Yes, with any checker that works on an arbitrary domain, which is all of them except Search Console. What you cannot see is what Google itself found for that site, because only the verified owner sees that report.

How do I tell a good backlink from a bad one? Read the referring domain rather than the count, check whether the link is editorial or placed, check the subject matches, check the rel attribute, and confirm the page is still live and still carrying it. How to check backlink quality works through all five.