Fixing a Referring-Domain Gap
A referring-domain gap means the sites you compete with in search are linked from many more separate websites than you are. It shows up when you compare your profile with competitors, and it often explains why a rival with similar content sits above you. Closing it does not mean copying every link they have, or chasing a number.
It means finding the websites that link to several competitors but not you, discarding the ones you should never pursue, and working out why the rest linked. This guide turns that comparison into a short, ranked list of sites you can realistically earn.
Why domains, not links
A referring domain is a separate website that links to you at least once. A site with 500 backlinks might have 500 referring domains, or it might have three, each linking from every page footer. Counting domains strips out that noise, which is why the comparison is made at domain level.
Search engines generally get more information from many independent sites linking to you than from one site linking many times. A dozen relevant local and trade sites each linking once usually tells a clearer story than thousands of links from a single partner. That is why the gap is worth measuring in referring domains, and why a single new domain from a relevant site can matter more than a batch of links from one you already have.
The count is still only a proxy. Two profiles with the same number of referring domains can be very different in quality. The comparison shows where you are short; the rest of this guide is about deciding which of the missing sites would actually help.
Picking the right competitors
A gap analysis is only as good as the list of competitors you feed into it. Many owners pick the biggest name in their industry, which produces an enormous gap full of national newspapers and household-brand partnerships that a small business will never earn. Pick instead the sites that appear above you for the searches that bring you customers.
- List ten to twenty searches that matter commercially, such as "emergency plumber chesterfield" or "handmade oak dining table".
- Search each one in a private window from your area and note which domains appear on page one.
- Remove marketplaces, directories and national publishers that rank for almost everything, such as large review sites and online encyclopedias. They are not your peers.
- Keep the three to five domains that appear most often and are businesses like yours.
A local tradesperson should compare against other local firms, not national chains. A niche online shop should compare against specialist shops with similar ranges. You want competitors whose links are within reach.
Running the intersect
The comparison you want is sometimes called a link intersect or backlink gap report: sites that link to one or more competitors but not to you. The Backlink Tools compare your referring domains with competitors; most third-party link tools offer an equivalent report as well.
Set it up at domain level and ask for domains linking to at least two of your competitors. A site that links to two or three businesses like yours has shown it is willing to link to your kind of business. A site that links to only one competitor is more likely to be a one-off: a personal connection, a sponsorship or a partnership you cannot copy.
| Linking domain | Links to | What it is | Keep? |
|---|---|---|---|
| chesterfield-trades-guild.example | Rival A, Rival B, Rival C | Local trade association member directory | Yes: join or apply |
| derbyshire-homes-blog.example | Rival A, Rival C | Local home improvement blog with a suppliers roundup | Yes: pitch inclusion |
| best-guest-posts-uk.example | Rival A, Rival B | "Write for us" site selling posts | No: paid links |
| seo-stats-for-every-site.example | Rival A, Rival B, Rival C | Auto-generated site statistics page | No: worthless |
| rival-a-sister-company.example | Rival A | Company owned by the same group | No: cannot replicate |
Export the full list to a spreadsheet and add three columns: what the site is, why it links to competitors, and what you would need to earn the same link. The table above shows the kind of judgement each row needs.
Links you should not copy
A competitor's link profile is not a shopping list. Some of what you find should be left alone, either because it is worthless or because pursuing it would break Google's link spam policies.
- Paid placements without disclosure. "Write for us" sites that charge for posts,
sidebar link sales and advertorials without
rel="sponsored". A competitor using them is taking a risk; copying them means taking the same risk. - Link networks. Clusters of blogs sharing a template, thin content and outbound links to unrelated businesses. If several competitors appear on the same odd network, an agency is probably supplying it.
- Auto-generated pages. Website value calculators, "sites like" pages, statistics pages and scraper copies. These link to everything and are not a gap.
- Links you cannot replicate honestly. Sister companies, a founder's personal website, a partner the competitor owns, or a sponsorship of an event that has already happened.
- Reciprocal link pages. "Useful links" pages that exist as part of swaps. Occasional natural link swaps between genuine partners are normal; systematic exchanges are named in Google's policies.
After this pass most gap lists shrink sharply. That is expected, and it is the point: a list of forty realistic targets is far more useful than a list of four thousand domains.
The fix, step by step
Step 1
Choose the competitors you actually meet in search
Search the ten to twenty phrases that bring you customers in a private window and note the domains that appear above you most often. Exclude marketplaces, national directories and publishers that rank for almost everything. Keep three to five businesses that are genuinely like yours in size, location and offer. These are the competitors whose links you have a realistic chance of earning, which makes the comparison useful instead of discouraging.
Step 2
Run a domain-level intersect against them
Use the Backlink Tools to compare your referring domains with those competitors, then filter for domains that link to at least two of them but not to you. Export the result to a spreadsheet. Working at domain level removes duplicate links from the same site, and the two-competitor filter surfaces sites that have already shown they link to businesses in your line of work rather than one-off personal or ownership connections.
Step 3
Strike out sites you should not pursue
Open each domain briefly and delete rows for paid guest post sites, advertorials without disclosure, obvious link networks, auto-generated statistics and scraper pages, and connections you cannot honestly replicate such as sister companies. Be strict. What remains should be sites a real customer, journalist or industry peer might read, because only those links are worth the effort and none of them put your site at risk under Google's link spam policies.
Step 4
Label each remaining site by why it links
For every site left, note the reason competitors are linked: membership of an association, a supplier or stockist list, a local business directory, editorial coverage, a resource page, an event or sponsorship, a review, or a guest contribution. Most gap lists fall into five or six of these groups. Grouping them turns hundreds of rows into a few clear jobs, and each job has its own realistic way to earn the link.
Step 5
Study the competitor pages that attract the links
Look at which pages on competitor sites receive the editorial and resource links. Often it is not the homepage but a price guide, a local data page, a checklist or a detailed how-to article. Note what makes each one link-worthy, such as original figures, a clear comparison or a free template. Then decide whether you can publish something genuinely better or different, rather than a copy with a few extra paragraphs.
Step 6
Match each group to a way of earning the link
Apply to associations and directories where you qualify, ask suppliers and partners to add you to their stockist or partner pages, pitch local bloggers and trade press with a relevant story, and offer resource page owners a useful page of your own. Start with the group that has the most sites and the lowest effort. Keep a column for the date you acted and the outcome so nobody is contacted twice.
Step 7
Track new referring domains every quarter
Re-run the comparison every three months with the same competitors and the same tool, and record your referring domain count, theirs, and how many sites from your target list now link to you. Expect slow progress measured in tens of domains, not hundreds. If a competitor suddenly gains a large batch of domains, look at where they came from, because it may reveal a new opportunity or a practice to avoid.
Typical groups and how each is earned
| Why competitors are linked | How you earn the same kind of link | Effort |
|---|---|---|
| Trade association or accreditation body lists members | Join or qualify, then check your member profile includes your website address. | Low once eligible |
| Supplier or manufacturer lists stockists or installers | Ask your account manager to add you to the stockist or approved installer page. | Low |
| Local business directories and chamber of commerce | Claim or create a listing with consistent name, address and phone details. | Low |
| Local news and trade press coverage | Offer a genuine story, data or expert comment; see the digital PR guide. | Medium to high |
| Resource and "useful links" pages | Publish a page worth listing, then ask the page owner politely. | Medium |
| Events, charities and clubs they sponsor | Support causes you actually care about; the listing link is a side effect and should be marked sponsored where paid. | Varies |
| Guest articles on industry sites | Write a small number of genuinely useful pieces for relevant publications, without keyword anchors. | High |
The first three groups are often the quickest wins for small businesses because they rely on relationships you already have. A plumbing firm that is a member of a trade body, buys from three merchants and belongs to a local chamber may be missing half a dozen links simply because nobody asked for the profile to be completed.
Local businesses and niche shops
Local service businesses
Local gaps are usually made of local things: the council's business directory, the town's business association, the football club programme, the community centre's list of hire partners, local bloggers and the regional newspaper. These links tell search engines where you operate as well as what you do. A competitor with twice your referring domains may simply have been trading longer and joined more of them.
Online shops
For shops, gaps often come from manufacturer "where to buy" pages, gift guides, product round-ups on specialist blogs, and forums where enthusiasts recommend retailers. Manufacturer links are the easiest: if you are an authorised stockist, ask to be listed. Gift guides and round-ups are seasonal, so pitch editors in good time before the season they are writing for.
Software and online services
Software gaps usually include integration partner pages, review and comparison platforms, and "alternatives to" articles. Build the integrations that customers ask for, make sure partners list them, and keep review profiles accurate. Avoid paying for placement in "best tools" lists unless the link is marked sponsored.
Measuring whether the gap is closing
Referring domain counts move slowly, and they drift up and down as link tools recrawl the web and drop dead sites. Track a few figures together so one number does not mislead you:
- Your referring domains from the same tool each quarter.
- Target list conversions: how many sites from your filtered gap list now link to you.
- Relevance of new domains: the share of new linking sites that are in your industry or area.
- Search Console top linking sites, as a cross-check of what Google has found.
- Rankings and clicks for the searches you used to choose competitors.
Rankings respond to many things besides links, including content, technical health and how well the page answers the search. If you close part of the gap and rankings do not move, compare the ranking pages themselves; the difference may be on the page rather than in the link profile.
1. What is a referring domain?
A referring domain is a separate website that links to your site at least once. If a local newspaper links to you from ten different articles, that counts as ten backlinks but one referring domain. Link tools report both numbers. Referring domains are usually the more useful one for comparing sites, because they show how many independent websites have chosen to link to you, rather than how many times a single site repeated the same link.
2. How many referring domains do I need to rank on page one?
There is no set number, and any figure quoted online is a guess. What matters is how you compare with the pages already ranking for your target searches, and how relevant and trustworthy the linking sites are. A local tradesperson may rank well with a modest number of local and trade links, while a national comparison search may require far more. Compare with the competitors you actually meet in results, not an industry average.
3. Should I try to get every link my competitor has?
No. Many links in any competitor profile are worthless auto-generated pages, and some may be paid or network links that break Google's link spam policies. Others come from ownership or personal connections you cannot copy. Filter the list to sites that link to at least two competitors, remove anything paid, automated or unreachable, and focus on associations, suppliers, local sites, press and resource pages where you can genuinely earn a place.
4. Which tool is best for finding competitor backlink gaps?
Any tool that can compare several domains at referring-domain level will do the job, and the Backlink Tools compare your referring domains with competitors directly. What matters more than the choice of tool is consistency: use the same one for you and every competitor, because each link database crawls a different part of the web. Cross-check the most important findings with the Links report in Google Search Console, which reflects links Google has found.
5. Why does my competitor rank higher with fewer referring domains?
Links are only one of many ranking signals. The competitor's page may answer the search more completely, load faster, match local intent better or have more relevant links even if there are fewer of them. Their links may also point to the specific page that ranks, while yours point mainly to your homepage. Compare the ranking pages side by side and check where the links on each site land before assuming the gap is the reason.
6. How long does it take to close a referring domain gap?
It depends on the size of the gap and how quickly you act, but it is usually a matter of months to years rather than weeks. Quick wins such as association memberships, supplier stockist pages and local directories can be done in a few weeks. Editorial coverage and resource links take longer because they depend on publishing something worth linking to. Measure progress quarterly and expect gradual growth rather than a sudden jump.
7. Is it acceptable to ask sites that link to competitors to link to me?
Yes, as long as you give them a genuine reason and do not offer payment for a followed link. Asking a trade association to list you as a member, a supplier to list you as a stockist or a blogger to consider your guide for their resource page is ordinary business. Keep each request specific and relevant to the page it would appear on, accept a no politely, and never send the same message in bulk.
The Backlink Tools pull your live link profile, compare your referring domains and anchor text with the competitors you choose, and surface acquisition opportunities from sites that link to them but not to you.
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