Referring Domains Tool: Track Unique Domains Linking to You
Enter any domain and see how many unique websites link to it in seconds, plus how that number has trended, so you can track real link profile growth.
Free with a Brainito account. No credit card required.
Count Unique Linking Domains
One number that matters more than raw backlink totals: how many distinct sites link to you.
Spot Growth and Drops
Trend data shows whether your link profile is expanding, staying flat, or quietly losing domains.
Compare Any Two Sites
Check your domain and a rival's back to back to see who is earning new links faster in 2026.
Frequently Asked Questions
Why do referring domains matter more than backlinks?
Ten links from ten different sites usually signal more trust than a hundred links from one site. Search engines weigh the diversity of your linking domains heavily, so this count is a strong indicator of authority.
What counts as a referring domain?
A referring domain is a unique website that links to the site you check at least once. If the same blog links to you from five different articles, it still counts as one referring domain in your total.
Is the Referring Domains Tool free?
Yes. It is free after creating a Brainito account, and you can check your own site or any other domain as often as you like once you are signed in, with no usage caps to plan around.
See how many unique domains link to any site in seconds
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