Referring domains are the websites that link to you, counted once each. Backlinks are the individual links. If three blogs link to your product from five hundred pages between them, you have five hundred backlinks and three referring domains, and the three is the number that matters. Domain Rating by Ahrefs is built on distinct referring domains with a followed link, weighted by how strong each domain is. That is why a founder should count sites, not links, and why a directory listing, which is one new site linking to you, is the cheapest way to add one.
Referring domains vs backlinks: the definition
A backlink is one link from one page to your site; a referring domain is the site that link lives on. Ahrefs and Semrush both use the same split, and the two numbers answer different questions.
- Backlinks count links. One page linking to you twice is two backlinks. A site that puts you in its footer on every page is thousands of backlinks.
- Referring domains count websites. The footer site above is one referring domain. Subdomains are usually rolled up: blog.example.com and www.example.com are both example.com.
Two things follow from the definition. The referring domain number can never be higher than the backlink number. And a backlink profile with a large gap between the two, say 20,000 backlinks from 40 domains, is nearly always a handful of sitewide links, not forty thousand endorsements.
The terms are sometimes swapped for “linking domains” or “ref domains”. They mean the same thing.
Why unique referring domains are what to count
Count referring domains because each new domain is a new, independent vote for your site, and a second link from the same domain is the same voter again. Ahrefs built Domain Rating on that idea.
Think about what a link tells a search engine. A site chose to point its readers at you. The first time a site does that, it says something. The fiftieth time the same site does it, in a footer or a sidebar, it says nothing new. So a fair measure of authority treats one domain as roughly one vote, and the count of distinct domains is that measure.
This is also the number that fits in a plan. A founder cannot control how many pages a directory or blog chooses to link from. A founder can control how many new sites link to them this month. Referring domains is the figure that goes up when you do the work.
How Domain Rating counts a referring domain
Domain Rating by Ahrefs takes every domain that links to you with at least one followed link, weights each by its own DR, and then divides that weight by the number of unique domains the linking site points at. Three parts of that sentence decide what a link is worth.
At least one followed link. A domain that only links to you with nofollow, ugc or sponsored links does not count toward DR at all. Product Hunt is a DR 91 site and its listing link is nofollow, so a Product Hunt page sends visitors and adds nothing to your score.
Weighted by the linking domain’s DR. One followed link from a DR 80 site outweighs several from DR 20 sites. The scale is logarithmic, so the gap is larger than the numbers suggest.
Divided by how many domains it links out to. A site’s DR is shared across every domain it links to with followed links. A DR 90 directory that links out to fifty thousand products passes a thin slice to each one. A DR 60 directory that links to two thousand products passes a thicker slice. This is why the biggest sites are not always the best links, and why a spread of followed links from mid-size domains beats one link from a giant that links to everyone.
Put the three together and the practical rule is short. DR moves when a domain that has never linked to you before gives a followed link. Everything else, more links from the same domain, nofollow links, traffic, content, moves it by nothing.
How many referring domains a new site needs
A new domain has zero referring domains and sits at DR 0 to 5. There is no published formula that turns a referring domain count into a DR figure, because the score depends on which domains, how strong they are and how many sites each of them links to. What we can say is what we see across founders’ sites and the 126 directories we track.
| Stage | Referring domains with a followed link | Where DR usually sits |
|---|---|---|
| Fresh domain | 0 | 0–5 |
| First listings live | Around 10 distinct DR 60+ domains | Double digits |
| One round of directory listings, after 1–3 months | Most of the directories that fit your product | 10–20 |
| A year of steady links | Listings done plus press, guest posts, integrations | 20–35 |
Two cautions. Ten followed links from ten domains that each link out to tens of thousands of sites will land lower than ten from more selective sites. And there is a lag of one to three weeks between a listing going live and Ahrefs registering the domain, so a count taken the week after submitting looks worse than the truth.
The number to watch is the referring domain count in the followed filter, month on month. If it climbs and DR does not, the new domains are weak or link out too widely. If neither climbs, the listings are not live or the links are nofollow.
Directory listings are the cheapest new referring domains
Each directory listing is one new domain linking to your site, and no other link is as quick or as predictable to get. A guest post takes a pitch and a draft. A press mention takes news. A directory listing takes a form.
Of the 126 directories, launch platforms and review sites we track, checked 22 September 2026:
- 40 give a followed link on a standard listing, so each one is a referring domain that Domain Rating counts.
- 18 are free to submit to, and 5 of those are free and followed.
- 16 of the 40 followed directories are freemium: free to list, with a paid lane that skips the queue.
- 41 only follow the link, or only keep it followed, once their badge is on your site.
- 82 link nofollow by default, though 63 across the dataset publish a route to a followed link, usually a badge, a top-3 launch finish or a paid tier.
The strongest followed listings we track, sorted by Domain Rating:
| Directory | DR | Link | Cost | Approval |
|---|---|---|---|---|
| Fazier | 83 | Followed | Freemium, $29 paid lane | Up to 30 days free, instant paid |
| Findly.tools | 81 | Followed | Freemium, $29 paid lane | Reviewed; Premium live within 24 hours |
| ToolPilot AI | 78 | Followed | Freemium | Not stated; badge link helps priority |
| There’s An AI For That | 77 | Followed | Paid, $49 | 1–2 days after manual review |
| PeerPush | 75 | Followed | Freemium, $39 paid lane | Free queue behind paid; paid live in about a minute |
| AI Tools Directory | 67 | Followed | Freemium | Free queue 30–90 days; Fast Lane 24–48 hours |
| Dev Hunt | 64 | Followed | Freemium, $49 paid lane | Free launches wait about six months |
| Promote Project | 50 | Followed | Free | Appears within minutes |
Three of the top eight need their badge on your site for the free tier to stay followed. Put one badge snippet in your footer and do those in one sitting.
Fit matters more than the table order. An AI directory will reject a bookkeeping tool, and a rejected listing is a referring domain you did not get. The dofollow list has every directory whose standard link is followed, and the free list has the eighteen that cost nothing.
How to check your referring domains
Use Google Search Console for a free count of linking sites, Ahrefs Webmaster Tools for the full followed-and-nofollow breakdown, and a Domain Rating checker for the score those domains add up to.
Google Search Console, Links report. Free for any site you have verified. Under Links, the “Top linking sites” table is your referring domains as Google sees them. It does not separate followed from nofollow and it lags, but it is Google’s own list, which no third-party tool can claim.
Ahrefs Webmaster Tools. Free for sites you own once you verify them. Site Explorer’s Referring domains report lists every domain, its DR, the number of links from it, and whether the links are followed. Filter to “Dofollow” to see the count that DR runs on. The “Lost” tab shows domains that used to link and stopped.
Our Domain Rating checker. The DR checker returns the Domain Rating by Ahrefs for any domain, yours or a competitor’s, with no sign-up. It gives the score, not the domain list, so use it to compare against the sites you want to outrank and to confirm that listings are registering.
Check monthly, not daily. A listing takes one to three weeks to show up, and a change of one to three DR points either way is noise.
Mistakes that inflate or hide the count
The common errors are counting backlinks when you mean domains, ignoring the followed filter, and never looking at lost domains.
- Counting sitewide links as many. A partner who puts you in their footer gives you thousands of backlinks and one referring domain. Report the one. Any tool or agency quoting a backlink count without a domain count is quoting the bigger number on purpose.
- Counting nofollow domains toward DR. The referring domains report includes them. Domain Rating does not. A profile of 60 referring domains with 50 of them nofollow behaves like a profile of 10.
- Missing lost domains. Directories prune unpaid or stale listings and blogs get redesigned. A referring domain count that stalls while you keep adding listings usually means old ones are dropping off. Check the lost tab and re-verify any listing that needs a badge.
- Paying for a nofollow listing. Several launch platforms sell a listing on a DR 80+ domain and ship it nofollow on the free tier. Check the link’s rel attribute on the live page before and after you pay.
- Submitting everywhere. A rejected listing is an afternoon spent for zero new domains. Pick the directories that take products like yours first, then sort by DR.
What to do next
- Open Ahrefs Webmaster Tools or Search Console and write down your referring domain count with the followed filter on. That is your starting line.
- Submit to the followed directories that fit your product, starting with the dofollow list. Do the free ones first, then the badge ones in one sitting, then decide on paid lanes with the fee in front of you. The free rank plan reads your site, scores all 126 directories against it and hands back the ten to do this week with the listing text ready.
- Check the count again in four weeks and run your domain through the DR checker. New domains that registered are progress; listings that did not appear need a follow-up or a badge.
- Once the directories are done, move to links only your product can earn: integrations, guest posts on sites your customers read, and unlinked brand mentions.