The most replicable competitor backlinks are the ones several rivals share
Competitor backlink analysis is the process of pulling the referring domains that point to sites ranking above you, then working out which of those links you can realistically earn too. The mistake most people make is treating a rival's backlink profile as a shopping list to copy top to bottom. It isn't. Their New York Times feature, their founder's podcast tour, their VC's portfolio page: you can't replicate those. What you can replicate is the repeatable stuff, such as niche roundups, resource pages, supplier and partner listings, community profiles, and directory entries. The fastest way to surface those is to find the links that show up across several competitors at once and are missing from your own profile. That overlap is the link gap, and it's where the highest-probability wins live.
The logic is simple. If a publisher has already linked to three companies in your space, they have no editorial reason to refuse the fourth. The placement is proven open. Contrast that with a link only one competitor has: it might be a personal relationship, a paid placement you can't see, or a one-off PR hit. Shared links are inherently more gettable.
What link gap analysis actually is
A link gap analysis (also called link intersect) compares the referring domains of two or more competitors against your own and returns the domains that link to them but not to you. A link intersect tool does the set math for you: feed it three or four competitor URLs plus your own, and it outputs a ranked list of domains you're missing.
The output is only as good as the competitors you choose. Pick sites that rank for the same commercial keywords you're chasing, not just big brands in a loosely related space. Three tightly matched rivals produce a far cleaner gap list than ten random ones. Ahrefs' study of over one billion pages found that the number of referring domains correlates with organic traffic more strongly than almost any other link metric, which is why the gap is measured in domains, not raw link count (Ahrefs referring-domains study).
How to run a competitor backlink analysis, step by step
- Identify 3-5 true competitors. Not your aspirational rivals, but the pages actually outranking you for your target terms. Search your money keywords and note who appears on page one repeatedly.
- Export each competitor's referring domains. Any backlinks tool with a live index will do this. You want domains, deduplicated, not individual URLs.
- Run the intersect. Load your rivals plus your own domain into a link intersect tool inside your backlinks toolset and filter for domains linking to two or more competitors but zero to you.
- Sort by overlap count. A domain linking to four of your five competitors goes to the top. One linking to a single competitor drops down or off the list.
- Score each for editorial openness (see the filter below).
- Build the outreach list from what survives the filter.
Google's documentation is a useful sanity check here. Links only pass signals when they're crawlable and followable, so verify the placements you're targeting aren't nofollowed or buried in JavaScript that Google can't render (Google Search Central on crawlable links).
The filter: which competitor backlinks are worth chasing
Not every gap link is replicable. Sort your list against two axes: how many competitors have it, and whether the placement is editorially open to a newcomer.
| Link type | Shared across rivals? | Editorially open? | Chase it? |
|---|---|---|---|
| Niche roundup / "best X tools" | Often | Yes, if you qualify | High |
| Resource / links page | Often | Yes, pitch to add | High |
| Supplier / partner / integration listing | Sometimes | Yes, if you integrate | High |
| Industry directory | Often | Yes, usually free | Medium |
| Community profile (forum, Slack, subreddit) | Often | Yes, self-serve | Medium |
| Broken page pointing to a dead rival URL | Occasionally | Yes | High |
| Digital PR / news feature | Rarely | No, needs a story | Low (as a copy target) |
| Guest post on a big publication | Sometimes | Conditional | Medium |
Two categories deserve a closer look. Resource pages and roundups are the cleanest replicable links because the publisher's entire intent is to list options: you just need to be a legitimate one and ask. And any gap link that points to a competitor URL returning a 404 is a broken link building opportunity: the page owner has a dead link, you have a working replacement, everyone wins.
Can you find competitor backlinks for free?
Partly. Google Search Console shows your own links but nothing about competitors. Free tiers of the major backlink tools cap you at a handful of results and often hide the referring page. For a one-off spot check that's fine; for a real gap analysis across three or four rivals you need a tool with a full live index. That's a large part of why teams pay for Ahrefs or SEMrush, and where a cheaper Ahrefs alternative that keeps a comparable link index but bills from ₹499/month changes the math, especially for smaller teams doing link building for startups on a fixed budget.
A free-first workflow that genuinely works: use the operators. Searching for phrases like intitle:"resources" plus your niche, or "recommended tools" plus your category, surfaces the same resource and roundup pages that show up in a paid intersect. You just do the overlap check manually across your top competitors instead of automating it. This scales to non-English SERPs too: run the same operators in Hindi, Tamil, or Marathi and you surface the vernacular roundups your English-only competitors never think to pitch.
Turning the gap list into links
Finding replicable links is half the job. Earning them is how to get backlinks at scale, and the tactic follows the link type. Roundups and resource pages take a short, specific pitch: reference the exact page, explain why you belong on it, done. Integration and partner listings usually require you to actually build or use the product first. Community profiles are self-serve. For the higher-effort gaps, guest posting and digital PR come into play, but treat those as inspiration for the kind of story that earns links in your space rather than placements to copy one for one.
Watch your anchor text distribution as you build. A batch of replicated links landing with identical exact-match anchors looks engineered; let the anchors vary the way genuine editorial links do. And run the discovered domains through a quick quality check before you pitch. A link gap will occasionally surface spammy or link-farm domains that link to everyone, and chasing toxic backlinks is worse than doing nothing.
Competitor analysis is one input into a complete link program. For the full framework covering strategy, tactics, and measurement, see the pillar on link building, and pair this gap work with a periodic backlink audit of your own profile so you know exactly which domains you already have before you go looking for the ones you don't. Feeding the winners back into your internal linking structure ensures the equity you earn actually flows to the pages you want to rank.
A quick worked example
Say you run a project-management SaaS. You pull referring domains for Asana, Monday, and ClickUp, intersect them against your own, and the gap surfaces a "27 best project management tools" roundup linking to all three, a startup-directory listing on two of them, and a university career-services resources page linking to one. Priority order writes itself: the roundup (three of three, editorially open) first, the directory (two of three, self-serve) second, the single-competitor university page last, if at all. You've turned an overwhelming export of thousands of links into a five-item outreach list, ranked by probability of success. That's the entire point of doing competitor backlink analysis as a gap exercise instead of a copy exercise.
Backlinko's analysis of competitor backlink techniques makes the same case from a different angle: the links worth studying are the patterns that repeat, not the outliers (Backlinko backlink analysis). Repetition across competitors is the signal. Chase the signal, skip the noise.