Practical guideUpdated

Backlink gap analysis: finding the sites that link to competitors but not you

A backlink gap analysis compares your referring domains with your competitors' to find sites that link to one or more of them but not to you. Those sites already cover your topic and link out to products like yours, so they are the most realistic outreach targets. Run it with a backlink tool such as Ahrefs, Semrush, Moz, or SE Ranking, then filter the list for relevance, quality, and the reason each site links.

Backlink gap analysis is one of the most efficient ways to find link and mention opportunities, because it starts from sites already proven to link in your space. This guide walks through the method, the filters that remove noise, and how to approach each type of target.

By , Founder, SerionFlow

What we measured ·

What Google shows for "backlink gap analysis" right now

Method: Live Google results (United States, desktop, English) for "backlink gap analysis" retrieved through DataForSEO's SERP API on 2026-10-22. Page types are our own classification of each ranking URL.

The top 8 organic results for "backlink gap analysis" were 4 guides or explainers, 2 product or service pages, 1 free tool, 1 forum or community thread. The first three were moz.com, backlinkgap.com, www.myprofitengine.com. Community threads (www.quora.com) ranked on page one, a sign searchers want first-hand answers, not only vendor pages.

Google showed an AI Overview for this query, citing 6 source domains including www.semrush.com, keywordseverywhere.com, help.seranking.com, www.tapclicks.com. Pages that state the answer directly and early are the ones an Overview can quote.

Top organic results for "backlink gap analysis", 2026-10-22
PositionDomainPage type
1moz.comGuide or explainer
2backlinkgap.comFree tool
3www.myprofitengine.comGuide or explainer
4legiit.comProduct or service page
5www.quora.comForum or community thread
6delante.coProduct or service page
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Step 1: pick competitors

Choose three to five domains that compete with you in search for your important queries, not only direct business rivals. Include at least one competitor of similar size, since its links are the most achievable.

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Step 2: run the gap report

In Ahrefs, use Link intersect; in Semrush, Backlink Gap; in Moz, Link Intersect; in SE Ranking, Backlink Gap Analyzer. Enter your domain and the competitors. Filter to domains linking to at least two competitors but not to you; those are the strongest signals that a site links to your category.

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Step 3: filter for quality and relevance

Remove spam, scraped directories, and sites unrelated to your topic. Check each remaining domain's traffic and whether it is a real publication or community. Open the linking page and note why it links.

Backlink gap target types
Linking page typeWhy it linksApproach
Best tools list or roundupRecommends products in your categoryAsk to be evaluated, with honest facts
Review or comparisonCompares named productsOffer accurate information and access
Resource pageLists useful tools or guidesSuggest your free tool or guide if relevant
Integration or partner pageLists partnersPursue a genuine partnership
News or study coverageCites data or announcementsPitch original research
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Step 4: outreach

Write a short, specific message explaining what you offer the page's readers, not what the link does for you. For lists and comparisons, offer facts, a trial, or a demo so the author can evaluate the product properly. For resource pages, point to a genuinely useful free tool or guide. Track replies and outcomes so you learn which target types respond.

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Backlink gaps and AI citations

The sites that link to competitors are frequently the same comparison and review pages that AI answers cite for category questions. Closing the gap therefore helps twice: links for Google rankings and accurate mentions for AI answers. Pair this analysis with a citation gap analysis of the domains AI answers cite for your prompts. SerionFlow does not run outreach; its free citation gap finder and competitor analysis tools help build the target list.

Clear answers

Frequently asked questions

What is a backlink gap?

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The set of domains that link to your competitors but not to you.

Is there a free backlink gap tool?

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Most full gap reports need a paid backlink tool. Some free tools and suite free tiers show limited data for a quick look.

About the author

· Founder, SerionFlow

Shadrack builds SerionFlow's site research, page generation, and Search Console tooling, and runs the free tools these guides pair with. Search Console figures cited on these pages come from serionflow.com's own property.

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