Free Backlink Gap Tool
See every site that links to your competitors but not to you — your ready-made link building prospect list. Compare up to 5 competitors free. No signup, no credit card.
How it works
- 1 Enter your domain and up to 5 competitors.
- 2 We compare their backlink profiles.
- 3 Get every domain linking to them but not you — ranked by overlap.
Why the gap is your best prospect list
A backlink gap is the set of websites that link to your competitors but not to you. These are the warmest outreach targets in link building. A site that already links to two or three of your competitors has shown it publishes links to companies like yours — so your pitch starts from relevance, not a cold ask.
The more competitors a domain links to, the stronger that signal, which is why this tool ranks prospects by competitor overlap first and domain authority second. Working the gap turns the vague question "who might link to me?" into a finite, prioritized list you can actually clear.
Free vs. paid backlink gap tools
| Tool | Competitors | Full results + CSV | Price | Account |
|---|---|---|---|---|
| Linkody — Free Backlink Gap Tool | Up to 5 | ✓ Free | Free | Not needed |
| Semrush Backlink Gap | Up to 4 | On paid plan | from ~$139/mo | Required |
| Ahrefs Link Intersect | Up to 10 | Paid, row-limited | from ~$129/mo | Required |
Competitor pricing as of mid-2026 — plans change, check current pricing.
Frequently asked questions
What is a backlink gap?
A backlink gap is the set of domains that link to your competitors but not to you. It's your most qualified prospect list for link building, because every domain in it already links to sites like yours. The more competitors a domain links to, the warmer the prospect.
How do I find backlinks my competitors have that I don't?
Enter your domain and up to five competitors above, then run the free analysis. The tool compares each site's backlink profile and returns every referring domain that links to your competitors but not to you — ranked by overlap and authority. No account or export credits needed.
Is this really free?
Yes. You can run the tool, see the full list of results, and export everything to CSV with no account, no credit card, and no trial. It's a free tool from Linkody, a backlink monitoring company.
Where does the backlink data come from?
We pull live data from a large commercial backlink index — the same class of data behind paid tools like Ahrefs and Semrush. For each site we analyze the strongest referring domains by authority, so the prospects you see are the ones actually worth pitching.
What's the difference between a backlink gap tool and a link intersect tool?
They're the same thing. "Backlink gap" is the common term; "link intersect" is Ahrefs' name for it. Both find the domains that link to several of your competitors but not to you.
How many competitors can I compare?
Up to five, plus your own domain. Five is the sweet spot: enough to surface the domains linking to multiple rivals — your strongest prospects — without diluting the list with one-off links.
What do I do with the gap list once I have it?
Start with the domains linking to the most competitors and pitch them for a link. Once you win those links, monitor them so you know if they stay live — that's what Linkody does.
You've found the gap. Now close it.
Win the links, then know the moment each one goes live — or quietly disappears. Linkody monitors your backlinks 24/7, so the links you work for don't slip away unnoticed.
Start monitoring — free 30-day trial