Link Gap Analysis / Link Intersect
Link gap analysis, or link intersect, finds websites that link to your competitors but not to you. These sites make strong prospects because they already link within your niche.
How the Analysis Works
Link gap analysis compares backlink profiles. You take your own site and a set of competitors, collect the referring domains linking to each one, and look for overlaps. The sites that appear in your competitors’ profiles but not in yours form the “gap.”
The value lies in the intersect. A site linking to one competitor might have a specific reason, such as a partnership, a client relationship or a paid placement. A site linking to three or four competitors is a different story. It is likely a resource page, a review site, an industry publication, a directory or a journalist who covers your space. It has already shown that it links to businesses like yours, so it is a far warmer prospect than a site found at random.
Most SEO tools offer this feature. Ahrefs calls it Link Intersect. Semrush calls it Backlink Gap. Moz and other platforms have similar reports. You enter your domain and several competitor domains, and the tool returns a list of referring domains that link to one or more competitors but not to you, often with a count of how many competitors each one links to.
Link gap analysis is one of the most practical steps in competitor backlink analysis. Where a broader review studies how competitors earned their links, a link gap report turns that study into a ready-made prospect list.
The method also works for individual pages. Comparing a competitor’s top guide with your own guide on the same topic shows which sites link to their page and not yours, which is useful for targeted outreach.
Running a Link Gap Analysis
Start by choosing competitors carefully. Your business rivals and your search competitors are not always the same. Search competitors are the sites ranking for your target keywords, which may include publishers, review sites and niche blogs. Pick three to five sites that rank consistently for the terms you care about most. A wider SEO competitive analysis helps identify who those sites are.
Next, run the report. Enter your domain as the target and your competitors as comparison sites. Choose whether to compare whole domains or specific URLs. Domain-level comparison gives the widest list. URL-level comparison is better when you want links for a specific page.
Set useful filters. Most tools let you show only domains that link to at least two or three competitors. That single filter removes much of the noise and surfaces the strongest opportunities. You can also filter by authority metrics, dofollow links, language or country.
Export the results to a spreadsheet. Add columns for the domain, its authority, how many competitors it links to, the type of site and the specific pages where competitor links appear.
Then review the referring pages, not just the domains. Clicking through to the page that links to a competitor shows how the link was earned, whether through a guest post, a resource list, a news article or a directory listing. That context tells you how to approach the site.
Repeat the analysis every few months. Competitors keep earning links, so new gaps appear over time.
Prioritizing Results
A link gap report can return hundreds or thousands of domains. Prioritizing turns that list into a plan.
Start with intersect count. Domains linking to several competitors come first, since they have the clearest track record of linking in your space.
Check quality next. Look for real organic traffic, editorial standards and relevance to your niche. Remove sites that sell links widely, sit in unrelated niches or show signs of being part of a network.
Assess how attainable each link is. Some competitor links come from partners, clients, sponsorships or the competitor’s own other sites, and you cannot replicate them. Others come from open opportunities, such as resource pages, guest post programs and journalists who quote experts. Focus on the second group.
Group domains by link type. Common groups include resource pages, guest post targets, directories and associations, news coverage, review sites and partner pages. Each group needs a different approach, so grouping makes outreach much more efficient.
Consider effort against value. A directory listing might take minutes. A guest post takes hours. A digital PR placement might take a full campaign. Balance quick wins with high-value targets.
Finally, look for patterns. If many competitor links come from one type of content, such as a statistics page or free tool, that is a sign to create a similar or better asset. A content gap analysis often reveals the pages you are missing.
Converting to Links
The final step is outreach, tailored to each type of opportunity.
For resource pages, suggest your most relevant resource, explain briefly why it fits alongside what is already listed and make it easy to add. Resource page link building often draws directly on link gap results.
For guest post targets, pitch specific article ideas that fit the publication’s audience and fill a gap in their existing content. Mention that you noticed they cover your industry.
For directories and associations, apply for a listing or membership where it makes sense for your business.
For news coverage, look at the journalists who quoted your competitors and offer them data, expert commentary or a fresh angle for future stories.
For review and comparison sites, ask to be included in relevant roundups, and offer a trial, demo or product details that make reviewing easy.
Personalize every pitch with what you learned from the analysis. Pointing to the exact article or list where your resource would fit gets far better responses than a generic request.
Track results by opportunity type, so you learn which kinds of competitor links you can win. Over time, closing the link gap helps your referring domain count catch up with, and eventually pass, the sites ahead of you.
Link gap analysis turns competitor data into a focused list of sites that already link in your niche. Choose the right competitors, prioritize domains that link to several of them, and tailor your outreach to how each competitor earned its link.