Free Backlink Gap Analyzer

Our backlink gap analyzer compares your domain's backlinks against up to three competitors and surfaces the gap: the referring domains that link to one or more of your competitors but not to you. Those sites already link to your niche, so they're the warmest outreach prospects you can find. Each gap domain is annotated with how many of your competitors it links to and its authority rank, then sorted so the highest-leverage targets sit at the top.

The workflow is one step. Enter your domain plus 1-3 competitor domains. We pull each domain's top referring domains from DataForSEO, build the set difference (their linkers minus yours), and rank the gap by competitor-count then authority. Export the full list as CSV to drop into your outreach tracker. Results are cached for 24 hours, so a repeat run is instant.

For Link Builders

Our tool turns competitor research into a target list. Work down the gap to:

• Find sites linking to several competitors at once (proven niche linkers, highest priority)
• Skip domains that already link to you (true gaps only)
• Export prospects to CSV for your outreach workflow

For Agencies

Our tool helps you scope a link campaign before quoting. Use the gap to:

• Show a client exactly which links rivals have that they don't
• Size the realistic opportunity by authority band
• Hand the team a ready-made, CSV-exportable prospect list

Why Use Our Backlink Gap Analyzer

• True gaps only: We subtract your own referring domains, so every prospect is a link you don't already have, not noise you have to filter.
• Prioritized for outreach: Domains linking to multiple competitors rank first, then by authority, so the warmest, highest-value targets are at the top.
• Honest about scope: The gap is computed over each domain's top 100 referring domains (the free-tier cap), not the full profile. We say so plainly so you read the list as a strong starting point, not an exhaustive audit.