How to Do a Backlink Gap Analysis

To do a backlink gap analysis, use a link-gap (“link intersect”) tool to find sites linking to your competitors but not to you, then qualify those prospects for relevance and quality, prioritize the ones you can realistically earn, and pursue them with genuine outreach or content. The value isn’t the raw list — it’s finding the relevant, quality, earnable link opportunities your competitors have and you don’t. And you earn these links; you don’t buy or scheme them. Here’s how.

This guide covers finding and qualifying the link opportunities competitors have that you don’t.

What a backlink gap analysis is

A backlink gap analysis (link intersect) compares your backlink profile to competitors’ to find sites linking to them but not to you. These are proven link opportunities — sites already willing to link in your space. It’s distinct from a backlink audit (reviewing your own links): the gap analysis looks outward for new link prospects. But the raw list is just the start — the value is in qualifying and earning the right ones.

Step 1 — Identify your real link competitors

Pick the right sites to compare against:

• Your SEO competitors (who ranks for your terms), and sites with strong, relevant link profiles in your niche.
• 3–5 relevant competitors surface the best shared opportunities.

Comparing to the right competitors is what makes the gap meaningful.

Step 2 — Run the link gap (intersect) analysis

Use a link-gap tool (Ahrefs Link Intersect, Semrush Backlink Gap, etc.):

• Enter your domain and the competitors’.
• The tool returns domains linking to competitors but not to you.
• Focus especially on sites linking to multiple competitors (they clearly link in your space — a strong prospect).

This produces your raw list of gap opportunities.

Step 3 — Qualify the prospects (relevance + quality)

The step that separates useful analysis from a spam list: qualify each prospect.

• Relevance — is the linking site actually related to your topic/industry? (An irrelevant link isn’t worth pursuing.)
• Quality — is it a real, authoritative site, or low-quality/spammy? (Skip the junk.)
• Link context — is it an editorial link you could realistically earn (a resource page, a roundup, a genuine mention), or something you can’t/shouldn’t replicate?

A qualified shortlist beats a raw list of hundreds.

Step 4 — Understand why each links to competitors

For qualified prospects, figure out how the competitor earned it — because that tells you how you could:

• A resource/links page? → pitch your relevant resource.
• A guest post/byline? → similar contribution.
• A mention/review/roundup? → get on their radar with something worth mentioning.
• A directory/association? → join if genuinely relevant.

Knowing the link type tells you the earning path.

Step 5 — Prioritize by value and earnability

Rank the shortlist:

• Value — authority and relevance of the linking site.
• Earnability — how realistically you can earn it (a resource-page add is easier than a major publication feature).
• Effort vs. reward — start with high-value, high-earnability prospects.

Pursue the winnable, worthwhile ones first — not every link on the list.

Step 6 — Earn the links (white-hat)

Go get the qualified, prioritized links — the right way:

• Genuine outreach — offer real value (a better resource, a relevant contribution, a reason to mention you).
• Create the linkable asset if needed (a resource worth linking to).
• Earn, don’t buy or scheme — the gap analysis finds targets; you earn them with legitimate link-earning. Buying links or schemes is a penalty risk, not a strategy.

The bottom line

Do a backlink gap analysis by finding sites linking to competitors but not you (link intersect), qualifying them for relevance and quality, understanding how competitors earned each link, prioritizing by value and earnability, and then earning the best ones with genuine outreach. The value is a qualified, earnable target list — not a raw dump — and you earn these links white-hat, never buy them. (SEO consulting runs backlink gap analyses and earns the links — or run a free site audit.)

Frequently asked questions

How do I do a backlink gap analysis? Use a link-gap or “link intersect” tool (in Ahrefs or Semrush) to compare your backlink profile against several relevant competitors and find sites linking to them but not to you. Qualify the resulting prospects for relevance and quality, skipping irrelevant or spammy sites, and understand how competitors earned each link so you know the earning path. Prioritize by the linking site’s value and how realistically you can earn it, then pursue the best prospects with genuine, white-hat outreach — earning, not buying, the links.

What is a backlink gap analysis? A backlink gap analysis, also called a link intersect, compares your site’s backlink profile to your competitors’ to find websites that link to them but not to you. These represent proven link opportunities — sites already willing to link within your space. It differs from a backlink audit, which reviews your own existing links; the gap analysis looks outward for new link prospects. Its real value comes from qualifying the prospects for relevance and quality and identifying the ones you can realistically earn.

What is the difference between a backlink gap analysis and a backlink audit? A backlink gap analysis looks outward, comparing your link profile to competitors’ to find new link opportunities — sites linking to them but not you. A backlink audit looks inward, reviewing your own existing backlink profile to assess its health, protect valuable links, reclaim lost ones, and identify any genuinely manipulative patterns. The gap analysis finds links to pursue, while the audit evaluates links you already have. They’re complementary parts of a complete off-page SEO process.

What tools do I need for a backlink gap analysis? The core tools are link-gap or link-intersect features in backlink platforms like Ahrefs (Link Intersect) or Semrush (Backlink Gap), which let you enter your domain and competitors’ to find domains linking to them but not you. You’ll also use judgment (and possibly the linking pages themselves) to qualify prospects for relevance and quality and to understand the link type. A spreadsheet helps organize, qualify, and prioritize the prospects into an actionable target list.

How do I qualify backlink prospects from a gap analysis? Qualify each prospect on relevance, quality, and link context. Relevance means the linking site is genuinely related to your topic or industry — irrelevant links aren’t worth pursuing. Quality means it’s a real, authoritative site rather than a spammy or low-quality one. Link context means understanding whether it’s an editorial link you could realistically earn, like a resource page, roundup, or genuine mention. This qualification turns a raw list of hundreds of prospects into a focused shortlist worth pursuing.

Should I try to get every link my competitors have? No. Not every link your competitors have is relevant, high-quality, or realistically earnable, and chasing all of them wastes effort. Instead, qualify the gap prospects for relevance and quality, then prioritize by value and earnability, pursuing the high-value, realistically-earnable links first. Some competitor links come from sources you can’t or shouldn’t replicate. The goal is to earn the relevant, quality links that move the needle, not to blindly match every link in a competitor’s profile.

Can a backlink gap analysis help me build links faster? Yes, by focusing your link-building effort on proven, qualified opportunities rather than guessing. A gap analysis surfaces sites already willing to link within your space (they link to competitors), and identifying how those links were earned gives you a clear earning path. This makes outreach more targeted and efficient. However, it identifies targets — you still have to earn the links legitimately through genuine outreach and valuable assets, since buying links or using schemes risks penalties rather than results.

Written by Bryan Collins, SEO & AEO strategist. Want a backlink gap analysis run and the links earned? See working with an SEO consultant or run a free visibility check.