Link Intersect

What Is Link Intersect?

Link intersect is a backlink analysis that finds sites linking to several of your competitors but not to you, the logic being that if a site links to two or three rivals in your space, it's demonstrably willing to link to a site like yours. Ahrefs and Semrush both ship a "Link Intersect" tool for exactly this, and it's one of the highest-hit-rate ways to build a targeted outreach list.

The stakes: instead of guessing which sites might link to you, you get a list of prospects that have already proven they link to your type of content. That turns cold, spray-and-pray outreach into warm, evidence-based prospecting.

A Real Example

You run a project-management SaaS. You drop three competitors, say Asana, Trello, and Monday, into a link intersect tool and set it to show domains linking to at least two of them but zero to you. Out comes a list: a "best PM tools" roundup, a productivity blog's resource page, a university's remote-work guide.

Every one of those already links to two rivals and skipped you, often just because they didn't know you existed. That's your outreach list: relevant, proven linkers, ranked by how many competitors they already point to.

Reading a Link Intersect Report

The more competitors a domain links to, the stronger the signal it'll link to you, but always weigh authority and relevance alongside the overlap count.

How to Run a Link Intersect Analysis

1. Pick genuine competitors. Choose 2 to 4 sites that compete for your actual keywords, not just big names in the industry. Better matches mean better prospects.
2. Open a link intersect tool (Ahrefs' Link Intersect or Semrush's Backlink Gap) and enter your competitors plus your own domain in the "doesn't link to" slot.
3. Sort by overlap. Domains linking to the most competitors go to the top of your list, they've shown the strongest willingness to link.
4. Filter for quality and relevance. Drop scraped directories and off-topic sites. You want prospects that are both authoritative and on-topic.
5. Find the linkable page. For each prospect, see why they linked to competitors, a roundup, a resource page, a citation, so you know what to pitch.
6. Reach out with a reason. Give them a concrete case for adding you: you belong in that roundup, your data is more current, your tool fills a gap. Relevance closes these.

Why Link Intersect Beats Cold Prospecting

Most link outreach fails because it starts from a guess: you decide a site might want to link to you and fire off an email. Link intersect flips that. Every prospect on the list has already, with their own hands, added a link to a site that competes with you, sometimes two or three. That's not a hunch that they link to your kind of content; it's proof. You're not asking "would you ever link to a tool like mine?" You're asking "you linked to two of my rivals in this exact roundup, here's why I belong there too."

That evidence changes the economics of outreach. A cold campaign might convert a low single-digit percentage of contacts; a well-filtered intersect list, pitched with a genuine reason, converts far better because the willingness is already established. It also protects you from wasting time on sites that simply don't give editorial links, if they've never linked to any competitor, they're probably not going to start with you.

Common Mistakes (and How to Fix Them)

• Picking the wrong competitors. Fix: use sites that rank for your keywords, not the biggest brand you can think of. A giant's links are often unreachable.
• Treating the list as final targets. Fix: it's a prospect list, not a link list. Each domain still needs vetting for quality and a real outreach angle.
• Ignoring why the link exists. Fix: match your pitch to the page type. A resource page, a roundup, and a data citation each need a different ask.
• Chasing overlap count alone. Fix: a relevant, authoritative domain linking to one competitor beats a junk site linking to all three. Weigh quality, not just the checkmarks.
• Running it once. Fix: competitors earn new links constantly. Re-run the analysis quarterly to catch fresh prospects.

Frequently Asked Questions

What's the difference between link intersect and a backlink gap analysis?

They're essentially the same idea under two names, Ahrefs calls it "Link Intersect," Semrush calls it "Backlink Gap." Both find domains linking to competitors but not to you.

How many competitors should I enter?

Two to four works best. Too few and the overlap signal is weak; too many and the list balloons with low-relevance domains. Pick close competitors for the cleanest prospects.

Do I need a paid tool for this?

The dedicated intersect tools live inside Ahrefs and Semrush, which are paid. You can approximate it manually by exporting each competitor's backlinks and finding the common domains, but it's slow and messy compared to the built-in reports.

Are link intersect prospects guaranteed to link to me?

No, they're proven linkers, not sure things. The tool tells you who's willing to link to sites like yours; converting them still takes a relevant page and a good pitch.

How does link intersect fit with my other link building?

It's the gap-filling piece. Pair it with reclaiming unlinked mentions and earning fresh citations via the HARO-style tactic, and you cover reclaim, gap, and net-new links.

Related Reading

• Competitor Backlink Gap Analysis
• Link Intersection Analysis
• Unlinked Mentions
• HARO / Connectively