Keyword Gap
Enter your domain and a few competitors to surface the queries they rank for and you do not, then separate true gaps from noise before anything reaches the content calendar.
Put your domain in the first field and one or more competitor domains, comma separated, in the second. The request runs on app.search.co, which compares ranking data from DataForSEO across the sites and returns the keywords where competitors have visibility you lack. One gap analysis is free with no login; repeat runs need a free search.co account.
A raw gap list is usually long, and most of it is not worth acting on. Competitors rank for their own brand names, for products you do not sell, and for long-tail variants that one good page would cover together. The useful skill is classification and prioritization, which is what the rest of this page is about.
What the gap report contains.
The report centers on keywords where at least one of your competitors ranks organically and your domain does not. Alongside each keyword you can expect the context needed to judge it, such as search volume, an indication of difficulty, and where the competitors rank.
Because every domain is measured against the same ranking dataset, the comparison is internally consistent even though no third-party dataset captures every query. Very low-volume or brand-new queries may be missing, and positions reflect a point-in-time snapshot rather than a live SERP.
- The keyword: the query a competitor ranks for, which you will later group by topic and intent.
- Demand context: volume and difficulty indicators so you can weigh the size of the prize against the effort.
- Competitor positions: how high each competitor ranks, which separates a strong foothold from an incidental page-two appearance.
Missing, weak and shared: three different problems.
Not every gap is the same kind of gap, and treating them identically wastes effort. It helps to sort keywords into three types before deciding anything.
| Gap type | What it means | Typical fix |
|---|---|---|
| Missing | Competitors rank, you have no ranking page at all | New content, or a new section on an existing page |
| Weak | You rank, but well below the competitors | Improve the existing page: intent match, depth, internal links |
| Shared | Several competitors rank and you do too, at similar positions | Defend and refresh; links often decide the order here |
Missing keywords are the classic output, but weak keywords are often the faster win. You already have an indexed page Google associates with the query, so improving it is cheaper than building and ranking a new URL. Check your current positions for weak terms with the keyword rank checker before writing anything new.
Shared keywords are where a market is contested. If you and three rivals all sit in the top ten, the gap is not coverage but strength, and the deciding factors are page quality, freshness and the links behind each page.
Turning a long list into a short plan.
Start by deleting. Remove competitor brand terms, product names you do not carry, locations you do not serve and anything with an intent your site cannot satisfy. This pass often cuts a list dramatically and is the step most teams skip.
Next, cluster what remains by the page that would answer it. Ten variations of the same question should map to one URL, not ten. Clustering turns a keyword list into a page list, which is the unit you can actually schedule and brief.
Then score each cluster on three questions: how many competitors rank for it (keywords that several rivals share signal established demand), how well it fits your offer, and how hard it looks relative to your authority. A cluster that every competitor ranks for, maps to your core service and sits within your difficulty range goes to the top.
- Overlap count: a term several competitors rank for is more likely to be real, sustained demand than one only a single site holds.
- Business fit: keywords close to what you sell deserve priority over traffic-only topics, even at lower volume.
- Feasibility: compare the difficulty against your current strength; a competitor analysis shows how far apart the domains sit.
A hypothetical gap run, start to finish.
Example only, with invented numbers: a payroll software site compares itself with three rivals and gets 2,400 gap keywords. Removing rival brand names and unrelated HR modules leaves around 900. Clustering those yields roughly 60 page-level topics. Of those, 12 are weak gaps where the site already ranks on page two, 30 are missing topics, and the rest are fragments too small to justify a page.
The plan that comes out is not 900 keywords. It is a dozen page refreshes in the first month, followed by the missing topics ordered by overlap count and business fit. That shape, refresh first and build second, is typical when gap analysis is done carefully.
Mistakes that inflate or mislead a gap analysis.
The tool reports what competitors rank for. Whether you should chase it is a judgment the data cannot make for you.
- Choosing mismatched competitors: a gap against a far larger or unrelated site produces thousands of keywords you will never realistically target.
- One page per keyword: writing a separate article for each variant creates cannibalization and thin content.
- Ignoring weak gaps: focusing only on missing terms leaves the cheapest improvements, existing pages that almost rank, untouched.
- Copying intent blindly: a competitor may rank with a tool, a category page or a forum thread. Match the format the results reward, not just the words.
- Trusting volume alone: volume figures are estimates and say nothing about conversion. A small, high-intent cluster can beat a big informational one.
Running a keyword gap analysis.
Pick peers
Choose two or three competitors that rank for your core terms and sit near you in authority.
Run the gap
Enter your domain and the competitors, comma separated, and open the report on app.search.co.
Clean the list
Delete brand terms, off-offer products and intents your site cannot serve.
Classify and cluster
Tag terms missing, weak or shared, then group them by the page that should rank.
Schedule
Refresh weak-gap pages first, then brief new pages in order of overlap and fit.
Keyword gap questions.
How many competitors should I include?
What is the difference between a missing and a weak keyword?
Is there a cost?
Why are some competitor keywords irrelevant to me?
Should I create a page for every gap keyword?
Where does the ranking data come from?
Pair it with these checks.
Need the gap turned into published pages?
SEO.co's on-page team maps gap clusters to URLs, refreshes the pages that almost rank and writes the ones you are missing.