Backlink Gap Finder - Link Prospects From Competitors

Find the websites that link to your competitors but not to you. Enter a few competitor domains and your own site, and get a ranked list of link-building prospects. Each one comes with its domain rank, spam score, how many competitors it links to and how many backlinks it gives them. It's a pay-as-you-go alternative to the link intersect and backlink gap tools in Ahrefs, Semrush and Moz, with no subscription.

What you get

One row per prospect (a linking domain), strongest first:

• referringDomain and url: the site to pitch
• domainRank (0-100): how strong the linking site is
• spamScore (0-100): low means a clean, real site
• competitorsLinked, linksTo and missingFrom: which competitors it links to and which it doesn't
• backlinksToCompetitors, dofollowBacklinksToCompetitors and backlinksByCompetitor: how many links it gives each competitor
• dofollow: whether at least one of those links passes link equity
• platformTypes: what kind of site it is (blog, news, ecommerce, forum, organization…)
• firstSeen: when it first linked to a competitor

Export to JSON, CSV, Excel or Google Sheets from the Dataset tab, or use the API.

Use cases

• Link building outreach: sites that already link to several of your competitors are the most likely to link to you too
• Competitor backlink analysis: see which publications, directories and blogs your competitors share
• Digital PR: find the journalists' sites and roundups covering your niche
• SEO agency prospecting: build a link-gap report for a client in one run
• Guest post and directory lists: filter by site type and domain rank to build a target list

How to use

1. Enter two or more Competitor domains (up to 20). With a single competitor you get its referring domains instead of a gap.
2. Enter Your domain(s). Sites that already link to you are left out.
3. With three or more competitors, choose Linking to: All competitors (fewer, stronger prospects) or At least 2 competitors (a longer list).
4. Optional filters: Minimum domain rank, Maximum spam score (30 is a good outreach cut-off) and Dofollow links only.
5. Set Max prospects (default 200, up to 20,000) and run the actor. Results appear in the Dataset tab.

Output example

{
  "referringDomain": "patrickstox.com",
  "domainRank": 52,
  "spamScore": 1,
  "competitorsLinked": 2,
  "linksTo": ["ahrefs.com", "semrush.com"],
  "missingFrom": [],
  "backlinksToCompetitors": 20463,
  "dofollowBacklinksToCompetitors": 20450,
  "backlinksByCompetitor": { "ahrefs.com": 20437, "semrush.com": 26 },
  "dofollow": true,
  "platformTypes": ["organization"],
  "firstSeen": "2026-08-10T08:07:18.000Z",
  "yourDomains": ["moz.com"],
  "url": "https://patrickstox.com"
}

Tips

• Sort by competitorsLinked first, then domainRank. A site linking to 4 of your 5 competitors is a warmer lead than a strong site linking to one.
• Big sites often have hundreds of thousands of linking domains. Set Minimum domain rank to 20 or more to skip low-value links.
• Pair it with the Backlink Checker actor to see the exact pages and anchor texts behind each prospect.

Pricing

You pay per request to the backlink index and per prospect returned. There's no subscription, and you can cap your spend with the run's maximum charge setting.