ChatGPT answers, unedited

For finding link gaps between your domain and top organic competitors, the easiest tools are the ones with a dedicated Backlink Gap / Link Intersect feature. The best options are: Stay Digital Marketers

Link Building Journal Stay Digital Marketers## My picks by use case

Easiest for most SEO teams: Semrush

The Backlink Gap tool is probably the quickest workflow:

1. Add your domain.
2. Add 3–5 organic competitors.
3. See domains linking to competitors but not you.
4. Filter by authority, follow links, traffic, and relevance.
5. Export prospects for outreach.

Semrush specifically lets you compare multiple competitors and filter for referring domains your site is missing. Semrush

Best data depth: Ahrefs

Use Ahrefs if link building is a major growth channel. Its Link Intersect workflow is excellent for finding:

• Sites linking to multiple competitors
• High-authority referring domains
• Industry resource pages
• Guest post opportunities
• Competitor content that attracts links

Ahrefs is often preferred for deeper backlink research because of its large link database and filtering options. Astro SEO Blog Rank Like A Hero

Best budget option: SE Ranking

If you need basic competitor gap analysis without paying for a premium suite, SE Ranking is worth considering. It covers the core workflow: compare domains → find missing referring domains → prioritize outreach. Stay Digital Marketers

What I’d actually do for a backlink gap audit

1. Pick your top 3–5 competitors ranking for your target keywords (not just business competitors).
2. Run the gap report.
3. Export domains where: - They link to 2+ competitors
4. Domain authority/rating is reasonable
5. The site is topically relevant
6. The link is editorial (not directories/spam)
7. Prioritize: - Industry publications
8. Resource pages
9. Expert roundups
10. Partner/supplier pages
11. Digital PR opportunities

A good shortcut is to focus on domains linking to multiple competitors but not you — those are usually the highest-probability prospects. Stay Digital Marketers

If you already know your competitors, I can also suggest the best tool/workflow for your specific niche (SaaS, ecommerce, local SEO, affiliate, etc.).

Yes. If your goal is specifically “which domains/pages link to my organic competitors but not to me?”, I’d shortlist these:

My pick: Semrush vs. Ahrefs

Semrush is probably the easiest if you just want to run:

My domain + 4 competitors → show domains linking to competitors but not me → prioritize prospects → export.

Its Backlink Gap report explicitly compares up to five domains, identifies referring domains you're missing, lets you filter by metrics such as Authority Score and traffic/category, and exports to Excel/CSV. Semrush Semrush

semrush.com

Ahrefs is my choice if you want to go beyond the basic domain gap. Its Link Intersect can compare up to 10 competitors and lets you analyze either referring domains or referring pages. That page-level capability is particularly useful when you want to figure out exactly which article/listicle/resource page is linking to competitors. Ahrefs Help Center Ahrefs Help Center

ahrefs.com

For your use case, I'd do this

1. Identify your 5–10 actual organic competitors, rather than just industry competitors.
2. Run Semrush Backlink Gap for the quick prospect list.
3. Run Ahrefs Link Intersect for the higher-value prospects.
4. Prioritize domains that link to multiple competitors but not you.
5. Filter toward dofollow + relevant + meaningful organic traffic/authority.
6. Then inspect the actual referring page to determine why your competitor got the link—listicle, directory, resource page, guest article, supplier page, digital PR, etc.

Ahrefs specifically recommends prioritizing domains that link to all competitors, then those linking to at least two competitors, and filtering for dofollow links and authority/traffic. Ahrefs

Bottom line: If you want the easiest UI → Semrush. If you want the best combination of gap discovery + digging into the actual links → Ahrefs.

If you tell me your domain + 3–5 competitors, I can also lay out exactly how I'd structure the backlink-gap analysis and which filters I'd use.

semrush.com

Ahrefs is my choice if you want to go beyond the basic domain gap. Its Link Intersect can compare up to 10 competitors and lets you analyze either referring domains or referring pages. That page-level capability is particularly useful when you want to figure out exactly which article/listicle/resource page is linking to competitors. help.ahrefs.com help.ahrefs.com

Yes. If your goal is specifically “show me the domains linking to my organic competitors but not to me”, there are two standout tools:

My recommendation

1. Semrush — easiest for what you're describing

Its Backlink Gap tool lets you enter your domain plus up to five competitors and immediately surfaces referring domains that link to competitors but not you. You can filter by Authority Score, traffic, category, etc., and export the results. Semrush Semrush

This is probably the best choice if you want:

My domain + 4 top organic competitors → give me the best missing link opportunities.

2. Ahrefs — best if backlink analysis is a major part of your SEO work

Ahrefs' Link Intersect is particularly flexible. You can compare your site against up to 10 competitors, analyze either referring domains or individual referring pages, and filter the opportunities by metrics such as DR, traffic, and dofollow status. Ahrefs Help Center Ahrefs

That's useful when you want to go beyond simply finding domains and answer:

“Which specific pages are linking to my competitors and could potentially link to this particular page on my site?”

Ahrefs also makes it easy to prioritize domains linking to multiple competitors—usually much stronger prospects than sites linking to only one competitor. Ahrefs

What I'd use for your workflow

If you're doing SEO competitor backlink gap analysis, I'd go:

Semrush → fastest/easiest prospect list
Ahrefs → deeper validation + finding the actual linking pages

A good process is:

1. Identify your 5–10 actual organic competitors rather than just business competitors.
2. Run the domains through Semrush Backlink Gap or Ahrefs Link Intersect.
3. Filter for domains linking to 2+ competitors.
4. Prioritize dofollow + relevant + authoritative domains.
5. Check the actual page where the competitor earned the link.
6. Determine whether you can realistically earn the same type of link—guest article, resource page, citation, digital PR, data study, partner page, etc.
7. Export the resulting prospects into your outreach workflow.

One important distinction: don't optimize for raw backlink count. A domain that links to 4 of your competitors is generally a much more interesting prospect than 20 low-quality domains that happen to link to one competitor.

If you tell me your domain + 3–5 competitors, I can also show you exactly how I'd structure the gap analysis and which filters/prioritization rules I'd use.

This is probably the best choice if you want:

My domain + 4 top organic competitors → give me the best missing link opportunities.

2. Ahrefs — best if backlink analysis is a major part of your SEO work

Ahrefs' Link Intersect is particularly flexible. You can compare your site against up to 10 competitors, analyze either referring domains or individual referring pages, and filter the opportunities by metrics such as DR, traffic, and dofollow status. help.ahrefs.com ahrefs.com

That's useful when you want to go beyond simply finding domains and answer:

“Which specific pages are linking to my competitors and could potentially link to this particular page on my site?”

Ahrefs also makes it easy to prioritize domains linking to multiple competitors—usually much stronger prospects than sites linking to only one competitor.

What I'd use for your workflow

If you're doing SEO competitor backlink gap analysis, I'd go:

If your goal is specifically “which sites link to my organic competitors but don’t link to me?”, I’d shortlist these:

1. Ahrefs — my first choice

Ahrefs Link Intersect is almost exactly what you're describing. You enter your domain plus competitor domains and it surfaces referring domains/pages that link to competitors but not you. Ahrefs currently allows up to 10 competitors in Link Intersect. ahrefs.comhelp.ahrefs.com

The nice part is that you can switch between:

• Referring domains → “Which websites should I try to get a link from?”
• Referring pages → “Which specific articles/pages already link to competitors?”

You can also filter for things like dofollow links and higher Domain Rating, making it easier to turn the raw gap into an outreach list. ahrefs.com

2. Semrush — probably the easiest UI

Semrush Backlink Gap is arguably the most straightforward if you want a visual competitor comparison → filter → export workflow.

You can compare your site against up to five domains, identify referring domains you're missing, filter by metrics such as Authority Score and traffic/category, and export the results to Excel/CSV. www.semrush.com

What I'd choose

If you're doing serious link-gap research: Ahrefs.

If you're doing SEO reporting/outreach and want something very easy for a team/client to understand: Semrush.

A particularly useful workflow is:

Google organic competitors → identify 5–10 genuine SERP competitors → run Link Intersect/Backlink Gap → filter for domains linking to 2+ competitors → prioritize authoritative/relevant domains → inspect the actual linking pages → build outreach targets.

That “links to multiple competitors” filter is important. A site linking to 4 of your competitors is generally a much stronger prospect than one that happens to link to only one. Ahrefs explicitly supports filtering by the number of intersecting targets. ahrefs.comhelp.ahrefs.com

If you tell me your domain + industry/country, I can also suggest the best way to identify the right organic competitors before running the backlink gap—rather than accidentally comparing yourself against irrelevant sites.

If your goal is specifically “show me domains that link to my organic competitors but not to my site”, I’d shortlist these:

1. Semrush — easiest for a straightforward gap analysis

My pick if you want speed. Backlink Gap lets you enter your domain plus up to five competitors, then surfaces referring domains that link to competitors but not you. You can filter by things like Authority Score, traffic and category, then export the results. www.semrush.com

A useful workflow is:

Your domain + 3–5 top organic competitors → “Best”/missing domains → filter for authority/relevance → export → outreach list.

Semrush also has a free backlink checker for quick competitor reconnaissance, although the full Backlink Gap workflow is more useful for systematic prospecting. www.semrush.com

2. Ahrefs — best if you want more control

Ahrefs Link Intersect does essentially the same core job: identify sites linking to competitors but not you. It supports up to 10 competitors, and you can analyze either referring domains or individual referring pages. help.ahrefs.com

The referring-page option is particularly useful. For example, you can find:

• competitor mentions in listicles
• resource pages
• industry articles
• pages linking to multiple competitors
• specific pages where your competitor earned a link

You can also filter by metrics such as DR and traffic and export the results. ahrefs.com

My recommendation

If you're doing this regularly:

Semrush → easiest operational workflow
Ahrefs → strongest for digging into why/how competitors earned the links

If you already have both subscriptions, I'd actually use Ahrefs to discover the gaps and Semrush to prioritize/validate prospects, rather than treating the two databases as interchangeable.

One important distinction: don't just look for domains linking to one competitor. The highest-value opportunities are often domains linking to 3–5 of your competitors but not you. That's a strong signal that the site is relevant to your niche and already willing to link to businesses/content like yours. Ahrefs explicitly recommends this filtering approach. ahrefs.com

If you give me your domain + 3–5 competitors, I can also lay out exactly how I'd structure the backlink-gap analysis (including which filters to use and how to turn the output into an outreach priority list).

Yes. If your main goal is “show me domains that link to my organic competitors but not to me”, I’d narrow it to these:

1. Semrush — best if you want the simplest workflow

Semrush Backlink Gap

You enter your domain + up to 5 competitors, and it surfaces referring domains that link to competitors but not you. You can filter by things like Authority Score, traffic and category, then export the opportunities to CSV/Excel. www.semrush.com

I'd pick this if: you want an outreach-ready list quickly without much analysis.

2. Ahrefs — best for serious competitive link research

Ahrefs Link Intersect

Ahrefs' Link Intersect does essentially the same core job, but lets you compare up to 10 competitors. Importantly, you can analyze either referring domains or referring pages, which is useful when you want to know exactly which competitor pages earned the link. help.ahrefs.com

You can also filter for things such as dofollow links and higher-DR sites. www.semrush.comahrefs.com

I'd pick this if: you're doing a more sophisticated link-building campaign and want to investigate why competitors earned particular links.

My recommendation

If you're starting from scratch:

Semrush → fastest/easiest gap report
Ahrefs → best depth and competitor-page investigation

One particularly useful workflow is:

1. Identify your actual organic competitors rather than just companies you consider competitors.
2. Put your domain + 5–10 of the strongest competitors into Link Intersect/Backlink Gap.
3. First filter for domains linking to multiple competitors — those are often the strongest prospects.
4. Filter out obviously irrelevant directories/spam.
5. Look at the specific competitor page receiving the link.
6. Classify the opportunity: directory, resource page, editorial mention, guest post, digital PR, linkable asset, etc.
7. Prioritize domains that link to 2+ competitors and have relevant traffic/authority.

Ahrefs can actually identify organic competitors based on overlapping top-10 keywords, which is useful for step 1. ahrefs.com

If you tell me your domain + 3–5 competitors, I can also suggest the exact filters I'd use to turn the raw backlink gap into a prioritized link-prospect list.

If your goal is specifically “show me domains that link to my top organic competitors but not to me”, I’d shortlist these:

1. Ahrefs Link Intersect — my pick

Ahrefs' Link Intersect is almost exactly what you're describing: enter your domain plus competitors and it surfaces referring domains that link to competitors but don't link to you. You can compare up to 10 competitors, filter the results, inspect the actual linking pages, and export the opportunities. help.ahrefs.com

The particularly useful part is that you can analyze either referring domains or referring pages. That lets you go beyond “who links to my competitors?” and identify the specific pages where the competitor earned the link. help.ahrefs.comwww.semrush.com

Best if: backlink analysis is a major part of your SEO workflow.

2. Semrush Backlink Gap — easiest for beginners

Semrush has a dedicated Backlink Gap report. Put in your domain and up to five competitors, and it identifies referring domains you're missing. You can filter by things such as Authority Score, traffic and category, then export the results to CSV/Excel. www.semrush.com

I'd probably choose Semrush if your workflow is:

Find competitors → identify missing links → prioritize prospects → hand them to outreach.

It makes that progression particularly straightforward.

3. Majestic Site Comparator — excellent for deeper comparison

Majestic's Site Comparator can compare backlink profiles for up to 10 competing websites, including referring domains, backlinks, Trust Flow, Citation Flow and Topical Trust Flow. Its Clique Hunter functionality is useful for finding sites that link to multiple competitors. majestic.com

It's more of a backlink-intelligence platform than a “give me a simple gap list” experience, so I'd put it behind Ahrefs/Semrush for ease of use.

My recommendation

If you're choosing one tool specifically for competitor link-gap analysis:

Ahrefs > Semrush > Majestic

I'd pick Ahrefs if you want the deepest analysis and up to 10 competitors. I'd pick Semrush if you want the most straightforward, marketing-friendly workflow.

One important distinction: don't just look for domains where all competitors have links. Also examine domains linking to 2–3 of your competitors. Those are often more realistic prospects than sites that happen to link to every competitor.

If you give me your domain + 3–5 competitors, I can also show you exactly how I'd structure the gap analysis (including which filters to use and how to prioritize the resulting link prospects).

If your goal is specifically “show me domains that link to my organic competitors but not to me”, the easiest options are:

My pick: Semrush if you want “easy”

Semrush Backlink Gap is probably the cleanest UI for your use case. You enter your domain + up to four competitors, and it directly surfaces referring domains that link to competitors but not you. You can filter by Authority Score, traffic, category, etc., then export the prospects. www.semrush.com

Open Semrush Backlink Gap

Ahrefs if you want more granular analysis

Ahrefs Link Intersect is arguably better if you're doing serious link prospecting. It supports up to 10 competitors and lets you analyze either referring domains or referring pages. You can also filter by DR, traffic, dofollow status, and other metrics. help.ahrefs.com

Open Ahrefs Link Intersect

A particularly useful workflow is:

1. Identify your actual organic competitors.
2. Put your domain first.
3. Add 5–10 competitors.
4. Filter for domains linking to multiple competitors, rather than just one.
5. Filter out low-quality/irrelevant domains.
6. Prioritize high-DR/high-traffic/relevant sites.
7. Click through to see which competitor pages earned the link.
8. Build your outreach list from there.

Ahrefs specifically supports filtering by the number of competitors receiving links, which makes it easy to identify sites that appear to be willing to link to businesses like yours. help.ahrefs.com

One important distinction

Don't confuse backlink gap with keyword/content gap. If you're trying to find:

“Competitors rank organically for these keywords, but my site doesn't.”

that's a Keyword/Content Gap analysis. Both Semrush and Ahrefs have dedicated tools for that too. www.semrush.com

Bottom line:

• Easiest: Semrush
• Most flexible/deep: Ahrefs
• Best for an SEO agency doing lots of competitor link prospecting: Ahrefs
• Best if you already use Semrush for keyword/organic competitor research: Semrush

If you tell me your domain + 3–5 competitors, I can also show you exactly how I'd structure the backlink-gap analysis and which filters I'd use to turn it into a prioritized outreach list.

Yes. If your goal is specifically “show me domains linking to my organic competitors but not to me”, there are two standouts:

My recommendation

1. Semrush — easiest for a straightforward competitor link gap

Its Backlink Gap tool is almost exactly what you're describing: enter your domain plus up to four competitors, and it identifies referring domains that link to competitors but not you. You can filter by Authority Score, traffic, category, etc., and export the results. www.semrush.com

Semrush Backlink Gap

2. Ahrefs — best if you want to dig deeper

Ahrefs' Link Intersect does the same basic job, but lets you compare up to 10 competitors and choose between referring domains and referring pages. You can also filter by things such as DR, traffic and dofollow status. help.ahrefs.comahrefs.com

Ahrefs Link Intersect

The referring-pages capability is particularly useful if you want to answer something more actionable than “who links to competitors?” For example: “Which exact articles/listicles link to 3 of my competitors but don't mention me?” help.ahrefs.comahrefs.com

If I were doing your analysis

I'd use Ahrefs if you have access to it, otherwise Semrush.

A good workflow is:

1. Identify your 5–10 true organic competitors rather than simply your business competitors.
2. Run the backlink gap/intersect against all of them.
3. First filter to domains linking to multiple competitors.
4. Prioritize dofollow + relevant + high-authority domains.
5. Look at the actual referring page, not just the domain.
6. Categorize opportunities: guest posts, resource pages, directories, product comparisons, listicles, digital PR, etc.
7. Export the shortlist for outreach.

Ahrefs specifically recommends starting with domains linking to all competitors, then expanding to domains linking to two or more competitors; it also suggests filtering by dofollow, DR and domain traffic. ahrefs.com

One important distinction: don't confuse backlink gap with content/keyword gap. If you also want to find keywords your competitors rank for but you don't, both Ahrefs and Semrush have separate Content/Keyword Gap tools. ahrefs.com

If you tell me your domain + 3–10 competitors, I can also lay out exactly how I'd structure the gap analysis and prioritize the link opportunities.

Yes. If your goal is specifically “show me domains that link to my organic competitors but not to me”, I’d shortlist these:

1. Semrush — easiest “gap” workflow

Semrush Backlink Gap is probably my first choice if you want something your team can use without much explanation.

You enter your domain + up to 4 competitors, and it identifies referring domains that link to competitors but not you. It also has filters for things like Authority Score and traffic, plus CSV/Excel export. www.semrush.comwww.semrush.com

A particularly useful feature is the Best / Weak / Shared / Unique classification:

• Best = competitors have links, you don't
• Weak = you have fewer links than competitors
• Shared = both you and competitors have links
• Unique = only one competitor has the link

That makes it very easy to turn a huge backlink dataset into an outreach prospect list. www.semrush.comwww.semrush.com

2. Ahrefs — best if you want more sophisticated analysis

Ahrefs Link Intersect is arguably the strongest dedicated link-gap feature.

You can compare up to 10 competitors, and importantly, you can analyze either referring domains or referring pages. help.ahrefs.com

The referring-page option is particularly valuable. For example, you can find:

Pages that link to Competitor A + Competitor B, but don't link to your equivalent page.

That can uncover very specific opportunities such as listicles, resource pages, reviews, and industry articles rather than just giving you a giant list of domains. Ahrefs also lets you filter by metrics such as DR and traffic and export the results. ahrefs.com

My recommendation

If you're choosing one tool solely for backlink gap analysis:

Semrush → easiest and fastest
Ahrefs → best for deeper prospecting

If you're doing serious link building, I'd lean Ahrefs because the ability to switch between referring domains and referring pages gives you more actionable opportunities. If you want a straightforward report that you can hand to an outreach team, Semrush Backlink Gap is exceptionally easy.

One important point: don't automatically use your business's generic “SEO competitors.” For the best gap analysis, use the actual domains ranking organically for your important keywords. Then prioritize domains linking to 2+ of those competitors but not you—those are often your highest-probability link prospects.

If your goal is specifically “show me domains that link to my organic competitors but not to me”, I’d shortlist these:

My pick: Ahrefs

Ahrefs Link Intersect is probably the cleanest option if backlink gaps are your main objective. You enter your domain plus up to 10 competitors, then it identifies referring domains/pages linking to competitors but not you. You can filter by metrics such as DR and traffic and export the opportunities. help.ahrefs.com

The particularly useful workflow is:

Your domain + 5–10 top organic competitors → “link to all competitors” → filter for dofollow/high-DR/high-traffic domains → export → prospect for outreach.

Ahrefs also has an Organic Competitors report, so you can use it to identify competitors rather than manually guessing them. ahrefs.com

Semrush is a very close second

Semrush Backlink Gap is arguably even easier for a quick comparison. It supports up to 5 competitors, has straightforward Best / Weak / Strong / Shared / Unique filters, and lets you export to Excel/CSV. www.semrush.com

The Best filter is particularly useful: domains linking to all your competitors but not your site. Those are often the highest-confidence outreach prospects.

What I'd choose

• Serious link-building / SEO team: Ahrefs
• Want the simplest visual gap report: Semrush
• Already paying for one of them: use its native gap tool rather than buying another platform
• Large competitor set: Ahrefs has the advantage with up to 10 competitors in Link Intersect. help.ahrefs.com

One important distinction: don't just compare against competitors you think are competitors. For a useful gap analysis, first identify your actual organic SERP competitors, then run the backlink intersection against those domains. That gives you much more relevant link prospects.

If you give me your domain + industry/country, I can also help you build the exact competitor set and a backlink-gap workflow (including which filters to use).

Yes. If your goal is specifically “which sites link to my organic competitors but not to me?”, there are two standout tools:

1. Ahrefs Link Intersect — my pick for link gaps

Ahrefs' Link Intersect directly finds domains/pages that link to your competitors but don't link to you. You can compare your domain against multiple competitors and filter the results—for example, by dofollow links and Domain Rating. ahrefs.comahrefs.com

What I particularly like for your use case:

• Referring domains → find websites linking to competitors but not you.
• Referring pages → find the actual articles/pages where competitor links appear.
• Filter to domains linking to all competitors, which is often a very strong prospecting signal.
• Good for turning the gap directly into an outreach list. ahrefs.com

Best choice if link building is the main reason you're buying the tool.

2. Semrush Backlink Gap — probably the easiest UI

Semrush's Backlink Gap lets you compare up to five domains simultaneously and identifies referring domains that link to competitors but not you. It also gives you Authority Score and filtering options, then lets you export the results to CSV/Excel. www.semrush.comwww.semrush.com

I'd choose this if you already use Semrush for:

• keyword research
• organic competitor identification
• rank tracking
• content gaps
• reporting

The workflow is particularly convenient because Semrush can suggest competitors from its organic-competitor data. www.semrush.comwww.semrush.com

My recommendation

If you're primarily doing backlink gap analysis: Ahrefs.

If you're doing broader SEO competitor analysis and want one platform: Semrush.

One important distinction: don't just export every competitor backlink and call it a gap. The useful list is closer to:

Competitors' referring domains − your referring domains + relevance/quality filters

I'd prioritize domains that link to 2–3+ of your competitors, are topically relevant, have meaningful organic traffic/authority, and have links that are editorial rather than obvious directories/spam.

If you tell me how many competitors you want to compare (e.g. 3, 5, or 10) and whether you're doing agency/client SEO or your own site, I can recommend the cheapest practical setup and a gap-analysis workflow.

Yes. If your goal is specifically “which sites link to my organic competitors but not to me?”, I’d narrow the field to these:

My pick: Ahrefs

Ahrefs Link Intersect is probably the cleanest match for what you're describing. You enter your domain plus competitor domains, and it surfaces referring domains/pages that link to competitors but not you. You can also filter for things like dofollow links and higher-DR domains. help.ahrefs.com

urlOpen Ahrefs Link Intersectturn0search1

The particularly useful workflow is:

Your domain + 5–10 top organic competitors → “linking to all competitors but not me” → filter by authority/traffic → export → outreach list.

Ahrefs also lets you analyze referring domains versus referring pages, which is useful because a domain-level gap can be very different from an individual-page opportunity. help.ahrefs.com

Semrush is an excellent alternative

Semrush's Backlink Gap is arguably even easier for a quick competitive report. You can compare up to five competing websites, then filter for Best, Weak, Shared, Unique, etc. links. It also lets you export the results to Excel/CSV. www.semrush.com

urlSemrush Backlink Gapturn0search5

I'd choose Semrush over Ahrefs if you're already using Semrush for keyword research/rank tracking, because you can combine your organic competitors and backlink gaps in the same workflow. Semrush specifically supports using its Organic Competitors report to identify competitors for the backlink-gap analysis. www.semrush.com

What I'd use for your exact task

If you're doing this regularly:

1. Identify organic competitors
→ Semrush Organic Competitors or Ahrefs competing domains

2. Run backlink gap
→ Ahrefs Link Intersect or Semrush Backlink Gap

3. Prioritize gaps

• Links to 3+ competitors → highest priority
• High-authority referring domains
• Relevant topical sites
• Dofollow links
• Sites with real organic traffic
• Editorial links rather than directories/spam

4. Separate opportunities into

• Competitor mentions/listicles
• Resource pages
• Guest/editorial opportunities
• Industry directories
• Digital PR/news
• Broken-link opportunities

Bottom line: If backlink gap analysis is the main thing you care about, I'd start with Ahrefs. If you want SEO + keywords + competitors + backlinks in one platform, Semrush is probably the better overall choice.

If you give me your domain + 3–5 competitor domains, I can also show you exactly how I'd structure the gap analysis and what filters I'd use to turn it into a prioritized link-building list.

If your goal is specifically “show me websites linking to my top organic competitors but not to my domain”, there are two standouts:

My pick: Ahrefs

Ahrefs Link Intersect is probably the cleanest tool if backlink-gap analysis is the primary job. You enter your domain plus competitor domains, and it identifies referring domains/pages that link to competitors but not you. It currently supports up to 10 competitors, and you can filter by metrics such as DR and traffic and export the results. ahrefs.com

urlAhrefs Link Intersectturn0search0

Semrush is arguably easier for an end-to-end workflow

Semrush Backlink Gap lets you compare up to five domains and has straightforward filters for things like Authority Score, traffic, and category. Its particularly useful feature is that Semrush can help identify your organic competitors first, based on shared Google rankings, and then feed those competitors into Backlink Gap. www.semrush.com

urlSemrush Backlink Gapturn0search1

What I'd use for your workflow

If you're doing this for SEO prospecting, I'd run:

Your domain → identify top 5–10 organic competitors → backlink gap → prioritize domains linking to 2+ competitors → filter for relevant/high-authority sites → export → outreach list.

A particularly valuable filter is “links to all competitors but not me.” Those sites are much stronger prospects than a site that happens to link to only one competitor. Ahrefs explicitly supports filtering by the number of intersecting targets, while Semrush has a Best category for domains linking to all competitors but not you. www.semrush.comhelp.ahrefs.com

Bottom line:

• Best pure link-gap tool: Ahrefs
• Best easiest all-in-one: Semrush
• If you already use Semrush for keyword/organic competitor research: I'd stick with Semrush rather than buying another platform.

If you tell me your domain + industry/country, I can also suggest a practical competitor set and a filtering methodology for finding the highest-value link gaps.

Yes. If your goal is specifically “show me domains that link to my organic competitors but not to me”, these are the easiest options:

My picks

1. Ahrefs — best if backlinks are the main job.
Its Link Intersect specifically finds referring domains/pages that link to competitors but not your site. You can compare multiple competitors and use the results to identify repeat linkers—often the strongest outreach prospects. ahrefs.com

2. Semrush — best if you also need organic competitors.
Its Backlink Gap lets you compare up to five competing websites and filter for domains linking to competitors but not you. It also lets you use its Organic Competitors data to help identify which competitors to analyze. www.semrush.com

For your exact use case, I'd lean Semrush if you're starting from “who are my actual organic competitors?”, and Ahrefs if you already know the competitors and want to mine their backlink profiles deeply.

A practical workflow

1. Identify your top 3–5 organic competitors based on the keywords/pages you actually care about.
2. Put your domain + those competitors into Ahrefs Link Intersect or Semrush Backlink Gap.
3. Prioritize domains that link to 2+ competitors, rather than sites linking to only one.
4. Filter for relevant/high-authority referring domains.
5. Examine the specific page where the competitor earned the link—resource page, comparison article, supplier directory, editorial mention, guest contribution, etc.
6. Build an outreach list from the opportunities that are realistically replicable.

If you tell me your domain + 3–5 competitors, I can also show you exactly how I'd structure the backlink-gap analysis and which filters I'd use.

For finding backlink (link) gaps between your domain and top organic competitors, the easiest tools are the ones with a dedicated “Link Gap” / “Backlink Gap” workflow rather than requiring manual exports.

Here are the strongest options:

My usual picks by scenario

Fastest workflow (most teams):

1. Add your domain.
2. Add 3–5 competitors ranking for the same keywords.
3. Export domains that link to competitors but not you.
4. Prioritize:
   • relevant industry sites
   • high-authority domains
   • links from competitor pages that rank well
   • sites linking to multiple competitors

Best overall choice: Semrush if you want a clean visual gap report.

Best for SEO specialists: Ahrefs because Link Intersect + Content Explorer gives more ways to evaluate whether a link is actually worth pursuing.

A simple prioritization formula:

• 5+ competitors have the link → high opportunity
• Topical relevance → higher priority
• Competitor got a link from a ranking page → stronger signal
• Low-quality directories/sitewide links → usually ignore

If you already know your competitors, you can also build a tighter gap list by comparing only the competitors ranking in the same SERPs rather than broad industry competitors.

For finding backlink gaps between your domain and top organic competitors, the easiest tools are the ones with a dedicated Link Intersect / Backlink Gap feature. These are the strongest options:

Best picks

1. Semrush Backlink Gap — easiest for most teams

• Add your domain + 2–4 competitors.
• It shows domains linking to competitors but not you.
• Filters include:
  • Authority Score
  • Follow/nofollow
  • New/lost links
  • Multiple competitors linking to the same source
• Good for turning gaps into outreach targets quickly.

2. Ahrefs Link Intersect — best for serious SEO work

• Compare:
  • “Linking to these competitors”
  • “But not linking to my site”
• Strong filters:
  • Domain Rating (DR)
  • Traffic
  • Link type
  • One link per domain
• Usually better for identifying genuinely valuable link opportunities rather than just collecting lists.

3. Moz Link Intersect — easiest if you already use Moz

• Good for smaller teams.
• Less data depth than Ahrefs/Semrush but straightforward.

A practical workflow

1. Identify your top 3–5 true organic competitors (not just business competitors).
2. Run backlink gap analysis.
3. Prioritize domains that:
   • Link to 2+ competitors
   • Have relevant topical alignment
   • Have strong authority/trust signals
   • Link with editorial context (articles, resources, guides)
4. Export opportunities into outreach categories:
   • Resource pages
   • Guest contributions
   • Industry directories
   • Partner mentions
   • Digital PR opportunities

If you only want one tool for this task:

• Semrush → easiest interface and quickest wins.
• Ahrefs → best data quality for advanced link building.

For agencies or in-house SEO teams doing this regularly, using both together is common: Semrush for discovery, Ahrefs for validation.

If your goal is specifically finding link gaps between your site and your organic competitors (sites that link to them but not you), these SEO tools make that workflow straightforward:

1. Ahrefs (my top recommendation)

Pros:

• Probably the easiest workflow.
• Huge backlink database.
• Finds domains linking to multiple competitors but not you.
• Can filter by DR, traffic, dofollow, language, new/lost links, etc.

Typical workflow:

1. Enter your domain.
2. Add 3–10 competitors.
3. Open Link Intersect.
4. Sort by:
   • Domain Rating
   • Traffic
   • Number of competitors linked
5. Export opportunities.

This is excellent for building an outreach list.

2. Semrush

Semrush's Backlink Gap tool is similarly polished.

It shows:

• Domains linking to all competitors
• Domains linking to some competitors
• Domains linking only to one competitor
• Toxicity metrics
• Authority Score

One advantage is that it integrates nicely with Semrush's outreach and link-building tools if you're already using that ecosystem.

3. SE Ranking

A strong budget-friendly option.

You get:

• Shared referring domains
• Missing backlinks
• Referring pages
• Anchor text
• Domain quality metrics

It's significantly cheaper than Ahrefs or Semrush while covering most needs.

4. Moz Pro

Moz's Link Intersect is easy to understand and suitable if you're focused on:

• Local SEO
• Smaller sites
• Simpler reports

The backlink index isn't as extensive as Ahrefs'.

5. Majestic

Majestic's Clique Hunter is powerful but geared more toward experienced SEOs.

It excels at finding:

• Networks of sites linking to competitors
• Industry-specific linking patterns
• Trust Flow/Citation Flow comparisons

The interface is less beginner-friendly.

If you're doing serious link building

I'd rank them:

1. Ahrefs – best backlink index and gap analysis
2. Semrush – best all-around SEO suite
3. SE Ranking – best value
4. Majestic – best for deep backlink research
5. Moz – easiest for casual users

A useful workflow

Rather than just exporting every missing link, prioritize opportunities by:

• Sites linking to 3+ competitors (strong relevance signal)
• High-authority domains
• Real editorial pages (not directories)
• Recent backlinks (last 6–12 months)
• Pages that are still actively updated

Those tend to produce higher-quality outreach targets than simply chasing the highest authority domains.

If you're managing multiple clients or a large site (100k+ backlinks), Ahrefs and Semrush remain the most efficient choices. For occasional audits or a tighter budget, SE Ranking offers much of the same functionality at a lower cost.

If your goal is specifically to identify link gaps (sites linking to competitors but not to you), the SEO tools below all support it, but they vary quite a bit in ease of use and data quality.

1. Ahrefs (my top recommendation)

Pros:

• One of the largest backlink indexes
• Very intuitive Link Intersect tool
• Compare your domain against up to 10 competitors
• Filter by:
  • Domain Rating
  • Follow/Nofollow
  • Traffic
  • New/Lost links
  • Language
• Export prospects directly for outreach

Typical workflow:

1. Enter your domain.
2. Add 3–5 organic competitors.
3. View domains linking to competitors but not you.
4. Sort by authority or traffic.
5. Prioritize outreach.

Best if you're actively building links.

2. Semrush

Their Backlink Gap tool is one of the easiest for beginners.

Strengths:

• Visual overlap charts
• Color-coded opportunities
• Toxicity indicators
• Outreach integration
• Can compare five domains simultaneously

Especially useful if you're already using Semrush for keyword tracking and site audits.

3. SE Ranking

One of the better values.

Includes:

• Backlink Gap analysis
• Competitor monitoring
• Historical backlinks
• Anchor text comparison

The interface is simpler than Ahrefs, making it good for freelancers or smaller teams.

4. Moz Pro

Offers a Link Intersect feature with:

• Domain Authority metrics
• Spam Score
• Linking domain analysis

Its backlink database is generally smaller than Ahrefs or Semrush, but it's straightforward to use.

5. Majestic

Best when you want to dig into backlink quality.

Highlights:

• Trust Flow
• Citation Flow
• Topical Trust Flow
• Historical index

Less beginner-friendly, but valuable for evaluating link quality rather than just quantity.

Which tool has the easiest gap analysis?

If ease is your priority:

1. 🥇 Ahrefs
2. 🥈 Semrush
3. 🥉 SE Ranking
4. Moz
5. Majestic

What to look for in the gap report

The highest-value opportunities are domains that:

• Link to multiple competitors but not to you.
• Have strong authority or trust metrics.
• Are topically relevant to your niche.
• Send referral traffic.
• Publish resource pages, industry directories, or editorial content where your site could realistically earn a link.

Rather than pursuing every missing backlink, focus first on sites that link to several of your competitors. Those are often the most attainable opportunities because they've already demonstrated a willingness to reference businesses like yours.

For finding backlink gaps between your domain and top organic competitors, the easiest tools are the ones with a dedicated Link Intersect / Backlink Gap feature. These are the strongest options:

Best picks by workflow

1. Fastest “who links to competitors but not me?” analysis

• Semrush Backlink Gap
• Add your domain + 2–4 competitors.
• Filter for:
  • “Missing” backlinks
  • High Authority Score domains
  • Relevant industry sites
  • Dofollow links

2. Best for serious link building

• Ahrefs Link Intersect
• Compare:
  • “All competitors but not your site”
  • Referring domains
  • Domain Rating (DR)
  • Traffic potential
  • Link type

3. Budget-friendly option

• SE Ranking Backlink Checker

Good if you want competitor backlink data without paying for a premium enterprise tool.

A practical gap-analysis workflow

1. Pick your true organic competitors (not just business competitors).
   • Use the domains ranking for your target keywords.
2. Run a link intersect report.
3. Export referring domains that link to:
   • 2+ competitors → highest priority
   • 1 competitor → secondary opportunities
4. Remove:
   • spam directories
   • irrelevant sites
   • paid/sponsored placements (unless part of your strategy)
5. Prioritize:
   • topical relevance
   • organic traffic
   • editorial links
   • pages that already link to similar content

A simple scoring model:

Opportunity score = relevance × competitor count × domain quality

If you already know your competitors, Ahrefs and Semrush will usually get you to a usable outreach list fastest.

If your goal is specifically backlink gap analysis (finding domains that link to competitors but not to you), some tools make this much easier than others.

1. Ahrefs (my top recommendation)

Ahrefs' Link Intersect report is widely considered one of the best.

You enter:

• Your domain
• 2–10 competitors

It returns:

• Sites linking to all competitors but not you
• Domain Rating (DR)
• Estimated traffic
• Number of competitors receiving the link
• Context for the backlinks

You can prioritize domains that link to multiple competitors, which often represent your highest-probability outreach opportunities.

Best if you care about quality over quantity.

2. Semrush

Semrush's Backlink Gap tool is similarly powerful.

Advantages:

• Visual overlap between competitors
• Filters by authority score
• Follow/nofollow filtering
• New vs. lost links
• Easy export into outreach lists

It's especially useful if you're already using Semrush for keyword tracking and site audits.

3. Moz Pro

Moz's Link Intersect is straightforward and less overwhelming.

Good for:

• Finding obvious opportunities
• Smaller link-building campaigns
• Agencies working with local businesses

Its index isn't as large as Ahrefs', but the workflow is clean.

4. Majestic

Majestic excels at analyzing:

• Trust Flow
• Citation Flow
• Link neighborhoods
• Historical backlink data

It's excellent for experienced SEOs but has a steeper learning curve.

5. SE Ranking

One of the best value options.

It offers:

• Competitor backlink comparison
• Missing referring domains
• Anchor text analysis
• Affordable pricing

Many freelancers choose it because it's significantly cheaper than Ahrefs or Semrush.

Which tool finds the best opportunities?

If your competitors have thousands of referring domains:

1. Ahrefs
2. Semrush
3. Majestic

If they have only a few hundred:

1. Semrush
2. Ahrefs
3. SE Ranking

What to look for in a link gap report

Rather than simply collecting every missing link, prioritize domains that:

• Link to 2 or more competitors
• Have relevant topical authority
• Send organic traffic
• Are editorial (not directories or spam)
• Are still actively publishing content

Those tend to convert into successful outreach much more often than random one-off backlinks.

If you're building links at scale (e.g. hundreds or thousands of prospects), Ahrefs Link Intersect is generally regarded as the fastest and most efficient workflow, while Semrush Backlink Gap offers the strongest all-around experience if you're already using its broader SEO toolkit.