Referring Domains vs Backlinks: The Difference and Which to Track

What is a referring domain?

A referring domain is a website that has at least one link pointing to your site. Each website counts once, no matter how many pages on it link to you. A backlink is each individual link. So 50 links from one blog equal 50 backlinks but only 1 referring domain. Referring domains measure how many different sites vouch for you.

The word "domain" here means the root domain, such as example.com. Subdomains like blog.example.com are usually rolled into the same referring domain by most tools, though not all of them do this the same way. If the term is new to you, our post on what a root domain is covers it in two minutes.

You will also see the same idea called "linking domains", "linking root domains", or "ref domains". Google Search Console calls them "Top linking sites". They all mean the same thing.

Referring domains vs backlinks: the difference in one example

Picture a small bakery site with links from three places. A local newspaper wrote one article and linked once. A food blog linked from four recipe posts. A city directory lists the bakery on every one of its 200 neighborhood pages, in the footer.

The bakery has 205 backlinks and 3 referring domains. If you looked only at backlinks, the directory would seem to be 97 percent of the link profile. In reality it is one weak vote. The newspaper link, a single backlink, is probably worth more than all 200 directory links together.

That is the whole difference. Backlinks count links. Referring domains count sources. Google is trying to judge how many independent sources trust a page, so the number of sources is the closer match to what Google cares about.

When you see referring domains vs backlinks side by side in a tool, read them together. Backlinks tell you how often you are linked. Referring domains tell you by how many sites. A big gap between the two points to a few sites linking many times, which is worth a closer look.

Why referring domains matter more than total backlinks

Each additional link from the same site adds less than the one before it. The first link from a domain tells Google "this site trusts that site". The second and third add a little. The two hundredth adds almost nothing. SEOs call this diminishing returns, and it is why a sitewide footer link does not make you 200 times stronger.

Studies back this up. Backlinko's analysis of 11.8 million Google search results found that the number of referring domains to a page had a stronger tie to rankings than the total number of backlinks. Ahrefs and others have published similar findings over the years. None of these prove cause, but the pattern is consistent.

There is a second reason. Total backlink counts are easy to inflate. A single widget, a blog roll, or a sitewide sponsor badge can add thousands of links overnight. Google's spam policies list widget links and sitewide paid links among the patterns it treats as link spam. Referring domains are much harder to fake at scale, which is exactly why they are a better signal.

How many referring domains do you need?

There is no universal number. The honest answer is "about as many as the pages already ranking for your keyword". A local plumber might rank with 10 relevant domains. A page targeting "best credit cards" competes with pages that have thousands.

Here is the method we use. Search your target keyword, take the top 10 results, and check the referring domains for each ranking page, not the whole site. Write the numbers down and sort them. The median (the middle value) is your realistic target. The lowest number tells you the floor. If you are far below the floor, links are likely the gap. If you are above the median and still not ranking, the problem is probably content or relevance instead.

Two caveats. Page-level numbers matter more than site-level numbers, because Google ranks pages. And relevance beats count. Fifteen domains from sites about home offices will do more for that desk article than 50 domains from random blogs.

How to check referring domains and backlinks for any site

Every backlink tool reports both numbers. The steps below work with Google Search Console for your own site and with a referring domains checker for anyone else's. For a fuller walkthrough of the tools, see how to check backlinks.

1. 1

   Start with Google Search Console

   Open the Links report and look at Top linking sites. That table is your referring domain list, straight from Google. The count at the top is your referring domain total, from Google's sample. Export it.

2. 2

   Run the domain through a backlink tool

   Type your domain into a backlink checker. It will show total backlinks and referring domains side by side. Note both numbers and the date. This is your baseline.

3. 3

   Filter to dofollow links

   Links marked nofollow, sponsored, or UGC (user generated content) pass less trust. Filter them out and check the referring domain count again. The dofollow count is the number that most closely tracks ranking power.

4. 4

   Sort referring domains by backlinks per domain

   Domains sending you dozens or hundreds of links are sitewide links, widgets, or footers. Look at each one. Some are fine, such as a partner site. Others are the kind Google may ignore or flag.

5. 5

   Check the same numbers for two competitors

   Repeat steps 2 to 4 for the sites ranking above you. Compare referring domains, not backlinks. The gap in domains is the gap you need to close.

6. 6

   Look at the trend, not just the total

   Most tools chart referring domains over time. A flat or falling line means you are losing sources as fast as you gain them. A rising line, even a slow one, is what you want.

7. 7

   Set up monitoring

   Add the domains to a backlink monitoring tool so you get told when a referring domain appears or drops off. A lost domain is easiest to win back in the first few weeks.

What makes one referring domain worth more than another

Not all referring domains carry the same weight. Once you have the count, judge the quality of each source with a few simple questions.

• Is it on your topic? A link from a site about your industry counts more than a link from an unrelated site of the same size.
• Does it have its own traffic and links? In the backlinks vs referring domains debate, this is where domain count wins. A site nobody visits and nobody links to passes little trust. Tools show this as domain authority, domain rating, or a similar score.
• Is the link editorial? A link an author chose to add inside an article beats a directory listing, a comment, or a profile page.
• Is it dofollow? Links with nofollow, sponsored, or UGC tags are hints to Google to discount them.
• Is it new? Your first link from a domain is the valuable one. Chasing a fifth link from a site that already links to you is usually wasted effort.
• Is it clean? A domain that exists only to sell links, or that links out to hundreds of unrelated sites, adds nothing. Our guide on toxic backlinks explains what to do with those.

On authority scores: Moz's Domain Authority, Ahrefs' Domain Rating, and similar metrics are made by tools, not by Google. Google has said many times that it does not use a single site-wide authority score. These scores are useful as a rough filter when comparing two sites. So what is a good domain authority? It is relative to your competitors, not a fixed target.

Can a website rank without backlinks?

Yes, for some keywords. Long-tail and local queries often have so little competition that a well written page with zero external links can reach the top 3. Google also uses many other signals, including content quality, relevance, and how well the page matches what the searcher wants.

For competitive head terms, ranking without referring domains is rare. The pages at the top have usually earned links over years, and Google treats those links as a strong sign of trust. If you are starting from zero, go after low competition keywords first. They bring traffic while you earn the domains you need for harder terms.

Are backlinks still a thing in 2026? They are. Google still lists links among the ways it finds and judges pages, and still publishes rules against link schemes. Their weight relative to content has dropped, but for competitive queries, referring domains remain one of the clearest gaps between page 1 and page 3.

Tracking referring domains as an SEO KPI

If you report on links, report new referring domains per month and total dofollow referring domains. Both are easy to explain and hard to game. Skip total backlinks in the summary and keep it in the appendix for anyone who wants it. When a client asks about referring domains vs backlinks, the bakery table above is a good two-minute explanation.

Pair the link numbers with an outcome, such as organic clicks or rankings for a target group of keywords. Links are a means, not the goal. Our guide on SEO KPIs shows how to build a small set of metrics that tell the story together.