SEO Toolz pulls the full referring-domain profile for your site and up to 10 competitors, then computes the gap: every domain that links to a rival but not to you — ranked by domain authority and how many of your competitors it already links to, so your outreach list writes itself.
| Referring domain | DR | Links to | |
|---|---|---|---|
| ahrefs.com/blog | 91 | 3 rivals | GAP |
| searchengineland.com | 90 | 2 rivals | GAP |
| backlinko.com | 82 | 2 rivals | GAP |
| moz.com/blog | 88 | — | ✓ have |
| wordstream.com | 84 | 1 rival | GAP |
Each gap domain gets an outreach score from its authority, dofollow status, and how many of your competitors it links to — chase the strongest first.
Promote any gap to an outreach target with a status (identified → contacted → won), owner, and notes. It’s a link-building CRM, not just a report.
We track your own referring domains over time and flag links that disappear, so you can win them back before rankings slip.
How it works
Up to 10 competitor domains per project — the same competitor list the rest of SEO Toolz uses.
Referring domains for every site are pulled via DataForSEO’s Backlinks API and compared against yours.
Filter by authority, export to CSV, or promote the best targets into your outreach pipeline.
Switch the Backlink authority section on for any client and their portal shows referring-domain counts for their site versus competitors, plus the top outreach wins you’ve landed — competitor names masked as “Competitor 1, 2…” unless you choose to reveal them.
THE BASICS
A backlink is simply a link from another website to yours. Search engines treat backlinks as a vote of confidence — a site with lots of links from relevant, reputable domains tends to rank higher than one with none, all else being equal.
Are backlinks easy to get? Not really — good ones take consistent effort, not a quick trick. Quality beats quantity every time: one link from a respected, relevant site is worth more than fifty from low-quality directories, and buying links or using link farms risks a Google penalty rather than a ranking boost. The realistic path is slow but learnable — most tactics take weeks or months to pay off, not days.
Original research, in-depth guides, free tools, or something visually shareable. People link to things worth referencing.
Respond to journalist requests with expert commentary or original data — press coverage earns strong, relevant links.
Write for reputable sites in your niche with a natural link back — quality over quantity of publications.
Find dead links on relevant sites and suggest your own content as the replacement.
Many sites keep a "useful tools/links" page — ask to be added if you're genuinely relevant.
Find sites linking to your competitors but not to you, then make the case they should link to you too — exactly what this feature does.
Tools and vendors you use will often link back in exchange for a testimonial or case study.
Lower effort, smaller impact individually, but easy wins — especially for local businesses.
The fastest way to start: run a Backlink Gap report against your top competitors below. It turns "go get some backlinks" into an actual, prioritised outreach list of real sites already linking to businesses like yours.
DataForSEO’s Backlinks API — an independent multi-trillion-link index. We store per-domain aggregates and your referring domains, not the entire link graph, to keep it fast and affordable.
From the referring domain’s authority (DR-equivalent), whether the link is dofollow, and how many of your tracked competitors it already links to. A high-authority domain linking to three rivals scores highest.
On demand any time, and automatically once a week. Each refresh is metered against your monthly intelligence credits.
Yes — every gap and outreach target exports to CSV, and the section can be included in scheduled client reports.
More of the platform
Your Growth Score, top priority actions, and competitor activity in one dashboard.
Plain-English, ready-to-paste fixes generated from your real crawl and ranking data.
Trace each keyword gap through to estimated traffic, leads, and revenue.
Estimated organic traffic, market share, and top pages for every competitor.
Track how often ChatGPT, Perplexity, Claude, Gemini, and AI Overviews cite you.
Free to start. No credit card required.