Best Backlink Checker Tools for B2B SaaS in 2026: Ahrefs, Semrush, Moz, Majestic, and SE Ranking Compared

Ahrefs studied roughly 14 billion pages in its index and found that 96.55% of them get zero traffic from Google. Its own top explanation for the gap: the pages that do get traffic tend to have backlinks from other sites, and the ones that don't, mostly don't.

That's why "backlink checker" has been climbing in Google Trends' SEO and Marketing category all year. US search interest in the term roughly doubled from 2025 to 2026 on Google's 5-year view, and it's still rising this quarter. B2B SaaS teams want to know who links to them, who links to their competitors, and which of those links actually move rankings and AI-search citations.

This guide compares the five paid backlink checkers B2B growth teams shortlist most often (Ahrefs, Semrush, Moz Pro, Majestic, and SE Ranking) plus Google Search Console as the free baseline. You'll get index size and freshness as each vendor reports them, current list pricing, free-tier limits, the named downside of each tool, and a decision guide by team type.

Key Takeaways

• Ahrefs starts at $129 a month and refreshes its link index every 15 minutes.
• Semrush reports 43 trillion backlinks, refreshed at least hourly.
• Moz Pro is the cheapest full suite, at $79 a month billed yearly.
• Majestic Lite costs $49.99 a month and is the link-only specialist.
• Search Console is free, but its tables stop at 1,000 rows.

Best backlink checker tools at a glance

Here's the short version. Each row shows who the tool fits, its entry price, the index size the vendor publishes, and what you can do for free.

Why B2B SaaS teams need a backlink checker in 2026

Backlinks still decide which pages earn search traffic. In the same Ahrefs research, only 3.45% of pages got any Google traffic at all, and 1.94% of pages got just one to ten visits a month. For a B2B SaaS company paying for every content piece, that's the difference between a page that compounds and a page that sits there.

A backlink checker answers four practical questions. Which of your pages have earned links? Which referring domains do your top three competitors share that you don't? Which links did you lose last month? And are any links pointing at you the kind Google's spam policies describe as link spam, such as automated link schemes or low-quality directory and bookmark links?

There's a newer reason too. AI answer engines lean on pages that already have authority, so link gaps show up in AI citations as well as in Google. GrowthCentr's guide to AI search visibility for B2B SaaS covers how that plays out, and a backlink checker is usually the first tool used to diagnose it.

It also ties directly to acquisition cost. Organic traffic from earned links is the main lever that pulls blended CAC down over time, which is why the B2B SaaS CAC benchmarks for 2026 separate paid and organic channels. If your organic pages aren't earning links, your blended CAC leans harder on paid.

1. Ahrefs: best overall backlink checker for fresh link data

Ahrefs is an SEO platform built on its own web crawler, which Ahrefs says is the second most active after Google's. Its backlink index holds 35 trillion external backlink records and 493 billion pages, and Ahrefs says it's updated with fresh data every 15 minutes. Site Explorer is where you check backlinks, referring domains, anchors, and Domain Rating (DR), Ahrefs' 0 to 100 score for a site's link strength.

Pricing: Lite is $129 a month, Standard $249, and Advanced $449, with Enterprise at $1,499 a month on an annual commitment. Annual billing saves up to 17%. Lite includes one user, and extra seats cost $40 a month each (up to two). Broken backlinks, Batch Analysis, and Content Explorer start on Standard.

Free option: Ahrefs Free (formerly Ahrefs Webmaster Tools) works on unlimited verified websites and shows 1K backlinks at once in Site Explorer. It's the best free way to see your own links, but it won't show competitors in depth.

The downside: the most useful link-building reports sit on Standard, so a team that wants competitor link gaps and broken-link prospecting is really looking at $249 a month, not $129. Seats add up fast too.

Best for: content-led B2B SaaS teams that run competitor link-gap analysis every month and want the freshest data.

2. Semrush: best backlink checker inside a full marketing suite

Semrush is a marketing platform that combines SEO, PPC research, content, and AI-visibility tools. Its Backlink Analytics database holds more than 43 trillion backlinks and 390 million referring domains, and Semrush says it's refreshed at least hourly. Its link-strength score is Authority Score.

Pricing: the SEO plan is $139 a month, or $117.33 a month billed annually. The SEO + AI Search tiers are $199 (Starter) and $299 (Pro+) a month, and extra users start at $45 a month. A free account gives you 10 reports per day, and paid plans come with a seven-day free trial.

The downside: Semrush makes the most sense when you use the rest of the suite. If you only need backlinks, you're paying for keyword, PPC, and AI-visibility tools you won't open. Per-user pricing also makes it pricey for a five-person marketing team.

Best for: B2B marketing teams that already run paid search and content and want one login for SEO, PPC research, and link audits.

3. Moz Pro: best budget suite for Domain Authority reporting

Moz Pro is the SEO suite behind Domain Authority (DA), the link-strength metric many partners, investors, and link sellers still quote. Link Explorer is Moz's backlink checker, and Moz says it covers 45.5 trillion links, 8.7 trillion URLs, and 1 billion domains.

Pricing: Standard is $99 a month, or $79 a month paid yearly. Medium is $179 ($143 yearly) and includes 20,000 backlink queries a month with up to 40,000 results per query. Large is $299 ($239 yearly) with 70,000 backlink queries. Moz also lists a $49-a-month entry plan for one website, and extra seats are $49 a month.

Free option: a free Moz account gets 10 Link Explorer queries per month, with DA, Page Authority, Spam Score, and linking-domain counts.

The downside: backlink query limits matter. The Standard plan is fine for checking your own site, but heavy competitor research pushes you toward Medium, and Moz's link data is generally seen as less fresh than Ahrefs' or Semrush's.

Best for: lean B2B teams that need DA for reporting, partner vetting, or PR, and want a full suite under $100 a month.

4. Majestic: best link-only specialist

Majestic does one thing: links. It scores sites with Trust Flow (link quality) and Citation Flow (link volume), and it keeps two indexes. The Fresh Index lists 187,398,812,175 unique URLs crawled for 24 June to 21 October 2026. The Historic Index covers 4,502,566,935,407 crawled URLs going back to 2006, last updated in May 2024.

Pricing: Lite is $49.99 a month with 5,000 Site Explorer rows per search, Pro is $99.99 with 30,000 rows, and the API plan is $399.99. Only the API plan includes API access. Lite and Pro come with a seven-day money-back guarantee for new customers.

The downside: there's no keyword research, rank tracking, or site audit, so you'll still need another tool. And the Historic Index hasn't been updated since 2024, which limits how far back fresh comparisons go.

Best for: link-building leads and anyone vetting guest-post or partner sites at volume on a small budget.

5. SE Ranking: best value all-in-one

SE Ranking is an SEO and AI-search platform that's built a reputation as the cheaper Ahrefs or Semrush alternative. Its backlink database lists 2.9 trillion backlinks and 6 billion pages crawled daily, and its link-strength score is Domain Trust.

Pricing: Core is $129 a month, or $103.20 a month billed annually, and includes unlimited keyword, competitor, and backlink research, 10 projects, and one manager seat. Growth is $279 ($223.20 annually) with three seats and full historical data. There's a 14-day free trial.

The downside: the index is far smaller on paper than Ahrefs', Semrush's, or Moz's, so expect fewer links reported for small or niche sites. Core keeps only six months of historical data.

Best for: early-stage B2B SaaS teams that want one affordable tool for rank tracking, audits, and backlink checks.

6. Google Search Console: the free baseline

Google Search Console's Links report shows external links Google has found to your own site: top linked pages, top linking sites, and top linking text. It's free and first-party, but Google is clear about the limits. The report is a sample, not a comprehensive list, and its tables are limited to 1,000 rows. It doesn't mark nofollow links, and it can include links that have since been removed.

The downside: you can't see competitors at all. Search Console tells you what Google sees for you, not where your rivals are winning links.

Best for: every team, as a free cross-check against whichever paid backlink checker you choose.

Backlink checker pricing compared

Here's what each tool costs at each step up, from the vendors' pricing pages. Monthly prices are month-to-month unless marked yearly.

Two things stand out. Majestic is the cheapest way into serious link data at $49.99 a month, and Moz's yearly Standard plan at $79 a month is the cheapest full suite. At the other end, a three-person team on Ahrefs Lite pays $129 plus two seats at $40 each, or $209 a month, before any add-ons.

Free backlink checkers: what you actually get

Most teams start free. Here's how far each free option goes before you hit a wall:

• Ahrefs Free: your own verified sites only, up to 1K backlinks visible at once. Best free view of your own profile.
• Semrush free account: 10 reports per day across tools, enough for a quick competitor spot check.
• Moz Link Explorer: 10 queries per month, with DA and Spam Score.
• Google Search Console: free first-party data for your own site, capped at 1,000 rows per table.

How to choose a backlink checker for your B2B team

Match the tool to the job, not to the biggest index number:

• Seed-stage SaaS, one marketer, tight budget: Google Search Console plus SE Ranking Core or Moz Standard.
• Content-led growth team publishing weekly: Ahrefs Standard, for fresh links, broken backlinks, and Content Explorer.
• Marketing team that also runs paid search: Semrush, so SEO, PPC research, and link audits share one login.
• Link-building lead vetting partner or guest-post sites: Majestic Lite or Pro, plus a free Moz account for DA.
• Agency-style reporting to a board or partners on DA: Moz Pro Medium.

Then run one test before you buy. Pick your own domain and two competitors, and check them in two tools during the free trial or free tier. Compare referring-domain counts and, more importantly, whether the top 20 referring domains look like real sites in your market.

A 30-minute monthly backlink audit for B2B SaaS

Whichever tool you choose, this routine catches most of what matters:

• Export new and lost referring domains for the last 30 days and note any lost links from high-authority sites.
• Run a link-intersect or backlink-gap report against your top three competitors and list domains that link to two or more of them but not to you.
• Check your top 10 product and comparison pages for referring domains, and flag any with zero.
• Scan new links for obvious spam patterns (sitewide footer links, auto-generated directories) and decide whether to ignore or disavow.
• Cross-check the totals against Google Search Console's Links report.

The gap list from step two becomes your outreach list. If you're enriching those domains with contacts, GrowthCentr's Clay vs Apollo comparison covers which enrichment tool fits that job.

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GrowthCentr

GrowthCentr's take: which backlink checker to buy

The named downside of this whole category: no backlink checker sees the whole web. Each vendor crawls differently, so link counts for the same domain can differ a lot between tools. Pick one tool as your system of record and track trends inside it, rather than comparing raw numbers across tools.

And don't treat DA, DR, Authority Score, Trust Flow, or Domain Trust as Google metrics. They're each vendor's estimate. Google's own guidance on link spam is a better guide to which links help and which ones carry risk.

Backlink checker FAQ

Next step: run a link gap this week

Start a free trial of the tool that fits your team, run your domain against your three closest competitors, and pull the domains that link to two or more of them. That one list will tell you more about your organic ceiling than any authority score. Then connect it to the AI-search side, because the same link gaps decide which brands get cited in AI answers.