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For finding websites that link to your competitors but not to you, start by comparing Ahrefs Link Intersect and Semrush Backlink Gap. Both document a competitor link-gap workflow. Majestic Site Explorer is another backlink-analysis option, but its cited overview does not establish an equivalent gap-finding feature. These are documented capabilities, not an independent test of which service has the most complete or accurate backlink database.
What to compare when choosing a competitor backlink tool
First decide what you need to discover. Finding domains that link to competitors but not your site is different from inspecting individual linking pages or reviewing a broader backlink profile. Then check the workflow against the work you actually do:
- Comparison scope: Can you compare a target with several competitors, and can you compare specific pages as well as domains?
- Useful output: Does the tool show missing referring domains, individual backlinks, or both?
- Filtering and analysis: Can you narrow results and examine details such as anchor text or referring IPs?
- Export and access: Can you export the results you need, and are the relevant features and quotas available on the plan you would buy?
Those checks are more useful than choosing on a headline metric alone. The available product documentation does not establish an apples-to-apples measurement of database coverage or accuracy, and current comparable plan prices and quotas are not established here.
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How the documented competitor workflows compare
| Tool | Documented competitor-analysis capability | What to assess | Evidence limit |
|---|---|---|---|
| Ahrefs Link Intersect | Finds referring domains or pages linking to competitors but not the target. Ahrefs help documentation says users can add up to 10 competitors, filter results, and export intersecting referring domains or backlinks. See Ahrefs’ Link Intersect instructions and its September 3, 2026 export guide. | Whether you need domain-level opportunities, page-level links, or both; whether its filters and export workflow suit your process. | The documented competitor limit and workflow do not measure independent database completeness or accuracy. |
| Semrush Backlink Gap and Backlinks | Backlink Gap compares profiles and can surface domains linking to competitors but not the target. Semrush’s Backlinks documentation also describes quick comparison, referring IP and anchor-text analysis, and competitor top-performing page insights. See its Backlink Gap feature overview. | How the gap workflow, side-by-side comparison, and deeper backlink reports fit your analysis and broader SEO work. | Current plan limits, export quotas, and comparable database quality are not established by these feature descriptions. |
| Majestic Site Explorer | Provides backlink-analysis reports for a website or page, as described in the Site Explorer overview. | Whether its site- or page-level backlink reports meet your analysis needs. | The cited overview does not establish a direct competitor-gap workflow, so it cannot be ranked against the other two for that task. |
Ahrefs Link Intersect: for finding competitor link opportunities
Link Intersect is the clearest documented fit when the question is, “Who links to competing sites but not to mine?” Ahrefs describes comparing a target with competitor domains or pages, then reviewing referring domains or backlinks that intersect with competitors but not the target. Its help materials document adding up to 10 competitors, filtering results, and exporting them.
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Before relying on the results, decide whether you want to pursue a domain that links to one or more competitors or inspect the specific pages earning links. The documented workflow supports both referring-domain and backlink views; check which output is most useful for the next step in your outreach or content analysis.
Semrush Backlink Gap: for gap discovery plus profile analysis
Semrush describes Backlink Gap as a way to compare backlink profiles and find domains linking to competitors but not the target. Its Backlinks tool adds analysis features including quick comparison, anchor-text and referring-IP analysis, and insights into competitors’ top-performing pages. That combination may suit readers who want to move from identifying gaps to examining the surrounding backlink profile.
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Feature descriptions do not establish what is included in each current subscription tier. Check the live plan details for access, competitor limits, and export quotas before treating the workflow as available at a particular price.
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Majestic Site Explorer: a backlink-analysis alternative
Majestic’s official overview describes Site Explorer as a suite of backlink reports for a website or page. That makes it relevant if your task is backlink analysis generally, but the cited page does not demonstrate a matching competitor link-gap workflow. If competitor gaps are the main requirement, verify the exact comparison capability directly before selecting it for that purpose.
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A practical shortlist before subscribing
- Define the output: Write down whether you need missing referring domains, individual linking pages, or a broader profile audit.
- Test the comparison workflow: Check how many competitors you can enter and whether the tool supports the domain- or page-level comparison you need.
- Inspect analysis and exports: Confirm that filters, report details, and export options support your process.
- Verify current plan terms: Check the vendor’s current pricing and quotas for the plan you would actually use. Comparable prices and plan-level limits are not established by the cited feature documentation.
- Keep data comparisons cautious: Treat each tool’s reported links as that vendor’s data. The documented workflows do not prove that their indexes are equally complete or accurate.
