Backlink Gap Analysis: A 7-Step Method to Find and Prioritize Links (2026)

Quick quiz

How should you get links from other websites?

Question 1 of 425%

Does your site already have useful content?

Very littleSome good pagesLots of articles and guides

Links still count. Google states in its guide to ranking systems that PageRank, its link analysis system, "continues to be part of our core ranking systems". The hard part is knowing which links to chase. A backlink gap analysis answers that question with evidence: instead of guessing who might link to you, you start from sites that have already linked to pages like yours.

This guide gives a seven-step method that works with any of the large suites, a scoring grid to prioritize the results, the mistakes that waste most of the time spent on this exercise, and the link between backlink gaps and visibility in ChatGPT, Gemini and Perplexity.

What is a backlink gap analysis?

A backlink gap is the set of referring domains that link to your competitors and not to you. The analysis compares several link profiles side by side and isolates those domains, sorted by how many competitors each one links to. It is a branch of competitor analysis focused on off-page signals.

It is easy to confuse with three neighboring analyses. Each answers a different question:

A single-domain review, like the one our free backlink analysis tool produces, describes your own profile. The gap analysis is comparative: it only makes sense with competitors, and it pairs well with a keyword gap analysis, since the pages that win links are often the same pages that win rankings.

Why run a backlink gap analysis?

Most link building starts with cold prospecting: lists of blogs, guest post platforms, generic outreach. Response rates are low because nothing tells you the site cares about your topic. A gap analysis reverses the logic. A domain that already links to three of your competitors has shown three times that it publishes about your subject and that it links out. Overlap is the strongest prospecting signal you can get from public data.

The analysis also explains ranking differences. If the pages ahead of you have 60 referring domains and yours has 12, content improvements alone rarely close the distance. The gap shows the size of the deficit and, more usefully, where the missing links come from: industry media, resource pages, partner pages, statistics roundups, comparison articles or local associations.

Finally, it reveals the tactics behind a competitor's growth. When a dozen gap domains link to the same competitor study, you know a data asset worked in your market. When most of them are podcasts or event pages, you know where the competitor spends its time.

How to run a backlink gap analysis in 7 steps

1. Pick search competitors, not business competitors

Compare yourself with the domains that rank for your target keywords, which are not always the companies you lose deals to. Take your 5 to 10 most important queries, note who holds the top positions, and keep the 3 to 5 domains that appear most often. Exclude giants like Wikipedia, Amazon or national newspapers: their profiles are too large and too broad to be replicated, and they flood the results with irrelevant domains.

2. Choose the comparison level

Compare whole domains to find sites that cover your industry in general. Compare exact URLs when you are trying to rank one specific page: put your page against the 3 to 5 URLs that outrank it for its main keyword. Page-level gaps are smaller but far more relevant, because every prospect has linked to an article on your exact subject.

3. Run the intersect in a backlink suite

Every large suite has a dedicated report. Semrush Backlink Gap compares a site with up to five competitors at once (Semrush, checked October 2026). In Ahrefs, the Link Intersect report (part of the Competitive Analysis tool) lists domains that link to the competitors you enter but not to your site. Moz Link Intersect and Majestic Clique Hunter do the same job on their own link indexes. Export the full list to a spreadsheet rather than working inside the interface.

4. Remove the noise

A raw export usually contains a majority of domains you should never contact. Delete scraper sites, auto-generated statistics pages, low-quality directories, link farms and sites with no organic traffic. Also remove links you cannot or should not replicate: links from a competitor's own network of sites, sponsorships, and paid placements. Google's spam policies list "buying or selling links for ranking purposes" as link spam, so copying a competitor's paid links copies its risk. Our guide to toxic backlinks details the patterns to drop.

5. Classify each remaining domain by link type

Open the linking page, not only the domain, and tag how the link was earned: editorial mention, resource page, guest article, product review, comparison, interview, partner or integration page, event, association membership. The tag tells you which approach to use, and the counts per tag show which tactics dominate your market.

6. Score and prioritize

Score each domain with the grid in the next section and sort by total. In practice, a domain that links to all your competitors is a high priority, one that links to two is medium, and one that links to a single competitor is low, unless it is exceptionally relevant. Ahrefs uses the same three-level logic in its published link gap method (January 2025).

7. Reach out with a reason, then track

For each prospect, decide which of your pages deserves the link and why it is better or newer than what the site already cites. A resource page needs a resource, a statistics roundup needs a figure, a comparison needs a product worth comparing. Write a short, personal message following the rules in our email outreach guide, log the date and status, and re-run the gap analysis every quarter to measure progress and catch new competitor links.

How to prioritize link gap opportunities

A long list of prospects is useless without an order. Score each domain from 0 to 3 on five criteria and work from the top of the list:

A domain scoring 12 or more deserves a tailored pitch. Between 8 and 11, a lighter approach works. Below 8, keep it for later. The criteria mirror those in our guide to quality backlinks: relevance and real traffic weigh more than any third-party authority score, which is an estimate built by each tool, not a Google metric.

Common mistakes in a backlink gap analysis

• Choosing the wrong competitors. Comparing a local business with a national brand produces thousands of prospects with no connection to your market.
• Stopping at the domain list. Without opening the linking page, you do not know why the link exists, so your pitch has no angle.
• Filtering only on an authority score. A small, very relevant blog with real readers often beats a high-score generalist site.
• Copying what cannot be copied. Sponsorships, a founder's personal network or a competitor's sister sites are not opportunities for you.
• Pitching without an asset. If no page on your site is worth citing, outreach fails whatever the prospect quality. Build the page first.
• Running it once. Link profiles change every month; a quarterly rhythm catches new links while the publishers are still active on the topic.

Backlink gaps and AI visibility

The same analysis now feeds visibility in AI answers. In a study of 75,000 brands, Ahrefs found that branded web mentions correlated with visibility in Google AI Overviews at 0.664, against 0.218 for the raw number of backlinks (Ahrefs, May 2025). Correlation is not causation, but the message is consistent: AI assistants reward brands that are discussed on many relevant sites, which is what a gap analysis helps you achieve.

Two adjustments make your gap analysis useful for GEO as well as SEO. First, keep the domains that mention competitors without linking: an unlinked brand mention still counts for AI. Second, cross the link gap with a citation gap: the pages that ChatGPT or Perplexity cite when they recommend your competitors are prospects of the highest value, because they influence both rankings and AI answers. Our study of the platforms AI cites most shows which types of sites to target first.

Sorank's SEO Competitor Spy shows which competitors AI assistants cite for the questions you track, so you know whose profile to study. On the link side, Sorank's backlinks acquisition feature obtains natural backlinks automatically from the sites of its 5,000+ users, which closes part of the gap without manual outreach.

From gap list to links

A backlink gap analysis is a short exercise with a long tail: one afternoon of comparison and filtering gives you a prospect list for the whole quarter. Start with the domains that link to all your competitors, open every linking page, and pitch only when you have a page worth citing. For the wider set of tactics, from digital PR to resource pages, read our backlink strategies guide and the definition of link building. To combine content, AI tracking and automatic backlinks in one tool, see Sorank's plans, from $49 per month billed annually, with a 3-day free trial.