Keyword Gap Analysis: Find the Keywords Your Competitors Rank For (and You Don't)

A keyword gap analysis is the fastest way to turn your competitors into a research department. Instead of guessing what to write, you start from queries that already bring them visitors, which proves that demand exists and that Google accepts this type of page. This guide also covers the two closely related questions: how to find competitor keywords, and how to run a complete SEO competitive analysis.

What is a keyword gap analysis?

It is a side-by-side comparison of the ranking keywords of several domains, sorted to reveal the queries you are missing. The output is a list of keywords classified by the relationship between your site and the competitors, each one a potential page or a section to add.

It is a specific form of content gap analysis: the content gap looks at topics and formats, the keyword gap measures the same problem with ranking data, query by query. The standard categories are:

How do you choose the right competitors?

Use the domains that rank for your keywords, not only the companies you sell against. Your search competitors are often media sites, marketplaces, directories or a niche blog that your sales team has never heard of.

• Search your 10 to 20 most important queries and note the domains that appear repeatedly in the top 10.
• Keep three to five competitors of a comparable size and topic. A giant generalist site ranks for everything and floods the analysis with irrelevant terms.
• Separate the competitor sets by offer if your site covers several markets: one set per product line or per country gives far cleaner gaps.

Our glossary entry on competitor analysis details how to qualify a competitor beyond search data, from positioning to content formats.

How do you find your competitors' keywords?

Export each competitor's organic keywords from an SEO tool, then add the free signals from Google itself. The tool data gives volume and position, Google gives intent and context.

1. Run a gap report in a dedicated tool: Semrush's Keyword Gap and Ahrefs' competitive analysis report both compare several domains against yours and classify the keywords automatically.
2. Check the top pages of each competitor: the pages that bring them the most organic traffic reveal their strategic topics faster than a list of 20,000 keywords.
3. Read their SERPs: titles, headings, FAQ blocks and "People also ask" questions show the vocabulary that works.
4. Open Google Search Console: queries with impressions but an average position beyond 10 are gaps you have already half closed.
5. Expand with a keyword tool: our free keyword research tool finds the variants and long-tail questions around each gap.

How do you filter and prioritize the gaps?

Keep the gaps that match your offer and your audience, then rank them by business value, intent and effort. A raw gap report often lists thousands of keywords; most are noise.

Apply the filters in this order:

• Relevance: remove competitor brand terms, products you do not sell and topics outside your expertise.
• Intent: informational, commercial, transactional or navigational. Commercial and transactional gaps close to your offer come first.
• Difficulty: compare the keyword difficulty with the authority of your site. A missing keyword with high difficulty can wait; a weak keyword at position 11 to 20 is often the quickest win.
• Volume and trend: useful as a tiebreaker, rarely as the first criterion. Low-volume, high-intent queries convert better.

A simple scoring grid works well: value for the business (1 to 3), intent fit (1 to 3), ease of ranking (1 to 3). Multiply the three and handle the highest scores first.

How do you turn keyword gaps into pages?

Group the gaps by intent, assign each group to a single URL, and decide whether to create or improve. Mapping is the step most teams skip, and it is the one that prevents cannibalization.

1. Cluster the keywords that Google answers with the same results: they belong on the same page.
2. Check your existing pages before creating anything. If a page already covers the topic, expand it with the missing sections.
3. Create new pages only for clusters without a home, starting with the highest scores.
4. Link each new page from the related pages of your site, with descriptive anchors.
5. Track the positions of the cluster for eight to twelve weeks before judging.

How do you run a complete SEO competitive analysis?

The keyword gap is the core, but a full SEO competitive analysis also compares content, links, technical health and visibility in the AIs. Each axis explains why a competitor ranks where you do not.

The technical axis can be checked page by page with our free SEO Chrome extension, which audits any URL, including your competitors' pages.

What about keyword gaps in the AIs?

The same logic applies to prompts: list the questions your buyers ask ChatGPT, Gemini, Perplexity or Claude, and note which brands are cited in the answers. A competitor cited where you are absent is a prompt gap.

These gaps rarely match the Google gaps exactly. The AIs favor pages that answer a question directly, contain sourced figures and are mentioned on third-party sites. Closing a prompt gap usually means publishing a clear, quotable answer on your site and earning mentions elsewhere. Our guide to the citation gap details the method for finding where the AIs cite your competitors instead of you.

Conclusion

A keyword gap analysis replaces intuition with evidence: your competitors have already tested the demand, and the gaps show you where to invest first. Choose real search competitors, filter hard, map each cluster to one page and repeat the exercise every quarter, in Google and in the AIs.

Sorank runs this work in autopilot: it analyzes your site and your competitors, finds the missing keywords, plans a calendar and publishes one optimized article per day, then tracks each week whether the AIs cite your brand. You can test it with a 3-day free trial.