Backlink Gap Analysis: Win the Links Competitors Have
•September 15, 2026•8 min read
Every page that outranks you has a link profile you can read. Competitor backlink gap analysis is the discipline of reading it properly: not "they have more links", but exactly which sites link to two or three of your competitors and not to you, which of those links actually moved their rankings, and which you can realistically earn or buy. Done right it turns link building from guesswork into a shortlist. Done the usual way it produces a spreadsheet of 4,000 domains nobody ever contacts.
TL;DR. Pick three to five competitors that rank for the keywords you want, not the biggest brands in the niche. Run a link-intersect report to find domains linking to at least two of them and not to you. Throw away everything without real traffic, topical relevance or an editorial context. Score what is left by how many competitors it links to and how it links to them. You will end with 30 to 80 domains, split into three lists: earnable (resource pages, citations of data, expert quotes), placeable (sites that publish editorial placements you can order), and ignorable. The gap is the map; the placement layer is how you close it on a schedule.
Why the gap matters more than the total
Backlinko's analysis of 11.8 million Google search results found that the number of sites linking to a page correlated with rankings more than any other factor; the number of referring domains, not the raw count of links. That is the metric a gap analysis measures, and it is why the total is a distraction. A competitor with 900 referring domains and you with 300 tells you nothing actionable. A list of 40 domains that link to three competitors and not to you tells you exactly where the 600-domain difference is concentrated and, more importantly, which of those domains have already shown they link to sites like yours.
That last point is the whole logic. A domain that links to two or three of your direct competitors has demonstrated three things: it publishes content in your topic, it links out to commercial sites in your category, and it can be reached, because someone already reached it. Each of those cuts your outreach failure rate. It is the difference between a warm list and a cold one, which we saw the value of in unlinked mention reclamation.
Step 1: choose competitors by SERP, not by brand
The most common mistake is running the intersect against the three biggest names in the industry. Their profiles are full of links you can never replicate: press about funding rounds, partnerships, Wikipedia. Instead take five keywords you actually want and note who sits in positions 1 to 10 for each. The sites that appear for three or more of them are your SEO competitors, whatever their size. Ahrefs' own guide to competitor link analysis starts the same way: competitors are defined by shared rankings, then their common links are pulled through the Link Intersect report. Include one or two sites that are smaller than you and still outrank you; their links are the most instructive, because they earned a ranking with fewer resources.
Step 2: run the intersect
Every major index has a version of the report: Link Intersect in Ahrefs, Backlink Gap in Semrush, and equivalents elsewhere. Enter your domain plus the competitors and ask for domains linking to at least two of them and not to you. "At least two" is the important setting. A domain linking to only one competitor is often a one-off: a partner, a client, a friend of the founder. A domain linking to two or more is a pattern, and patterns are what you can repeat.
Export with the metrics you will score on: estimated organic traffic of the linking domain, its topical category, the linking page URL for each competitor, the anchor text and the follow attribute. Expect a few thousand rows. That is fine; the next step removes most of them.
Step 3: cut the list, hard
A gap list is only useful once it is short enough to act on. Apply four filters in order and delete, do not "keep for later":
| Filter | Delete when | Why |
|---|---|---|
| Traffic | The domain has no measurable organic visitors | Ahrefs found 96.55% of pages get no Google traffic; a link from a page nobody visits is a link nobody sees |
| Relevance | The site's topic has nothing to do with your buyer | Relevance beats authority, as we showed in Niche-Relevant Backlinks |
| Context | The competitor's link is a footer, sidebar, comment, profile or press-release syndication | Those are the link types Google's link-spam policy singles out; copying them copies the risk |
| Replicability | The link came from an event, a partnership or a news story you cannot recreate | Aspirational rows waste outreach time |
Typically 80 to 90% of the export goes. What remains is a list of real sites, in your topic, that gave editorial links to at least two direct competitors. That list is the asset; everything before it was noise.
Step 4: score what is left
Rank the survivors with a simple score, because a list without an order gets worked from the top of the spreadsheet, which is alphabetical:
- Competitors linked (×3). Three competitors beats two; the domain is a habitual linker in your category.
- Link type (×2). In-content editorial mention or citation scores highest; resource-page listing next; author bio last.
- Traffic to the linking page (×2). Not the domain, the page. A DR 70 site's dead 2019 post is worth less than a DR 40 site's page that still ranks.
- Target page it points to (×1). If the competitor's link points to their commercial page rather than their blog, the site is comfortable linking to money pages, which is rarer and more valuable.
The top 30 by score is the working list. Everything below can wait a quarter.
Step 5: split by how the link can be won
Now read each surviving row and ask one question: how did the competitor get this link? The answer sorts the list into three piles, and each pile has a different playbook.
Earnable
Resource pages, "best tools" lists, citations of a competitor's data, expert quotes. These respond to a specific ask: a better resource for the resource page, a fresher number for the citation, a named expert for the quote. If competitors are cited for statistics, the fix is a linkable asset of your own; the gap analysis has just told you which sites will cite it.
Placeable
A large share of a competitor's in-content links on mid-sized topical sites are editorial placements they ordered. You can usually tell: a standalone article on the site, one commercial link in the body, published within a cluster of similar posts. Those sites accept placements, and the fastest way to close that part of the gap is to order the same kind of placement, with better content, through a vetted marketplace where the donor can be filtered by topic and real traffic. This is the pile that moves on a schedule, which matters when a launch or a season is approaching. Pricing is per link and public, so the cost of closing the placeable gap is a number, not a hope.
Ignorable
Links from the competitor's own network, their agency's other clients, their investors' portfolios, sponsorships you will not buy. Cross them off and do not look back.
How many gap links you actually need
Not the full list. The point of a gap analysis is to close the distance to the pages ranking above you, and we covered the arithmetic in How Many Backlinks Do You Really Need to Rank: compare your target page's referring domains with the pages at positions 3 and 10, not with the whole domain. Often the gap at page level is 8 to 20 relevant domains, and a single quarter of work on the top of the scored list closes it. Our own data study of 9,670 vetted domains shows why page-level comparison matters: referring domains climb steeply by DR band, so a domain-level gap of hundreds can be a page-level gap of a dozen.
Run it quarterly, not once
Competitors keep earning links, and every new common link between two of them is a fresh, warm opportunity. Save the scored list, re-run the intersect each quarter, and diff it: new rows are the priority, rows that dropped mean a competitor lost a link you might now win outright. Log every link you gain from the list with the date, so that in six months you can see which pile, earnable or placeable, actually moved your rankings, and shift the budget toward it.
FAQ
What is a backlink gap analysis?
A comparison of your backlink profile with your competitors' profiles to find domains that link to them but not to you. The useful version restricts the list to domains linking to at least two competitors, then filters for traffic, relevance and editorial context.
Which competitors should I include?
The sites that rank for your target keywords, chosen from the actual SERPs, not the biggest brands in the industry. Include one smaller site that outranks you; its links are the most replicable.
Should I copy every link a competitor has?
No. Footer, sidebar, comment, profile and syndicated press-release links are the types Google's spam policy targets. Copy editorial links in real content on sites with real traffic, and skip the rest.
Can I buy my way through the gap?
Partly. The placeable pile, editorial placements on topical sites, can be ordered and scheduled. The earnable pile needs a resource or data worth citing. Most winning programmes run both.
