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Tracking ChatGPT · Perplexity · Claude · Google AI Overviews
  1. Home
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  3. Topic Gap Checker
Free SEO Tool

Topic Gap Checker

The Topic Gap Checker compares the Google keywords of two websites. Enter your site and one competitor. The tool lists the keywords the competitor ranks for that your site does not rank for, and the keywords you both rank for.

Each keyword shows how many people search for it each month, how hard it is to reach the first page, and where each site ranks today. The list of missing keywords is sorted by searches, so the biggest openings come first.

Use the missing keywords to plan your next articles. Use the shared keywords to see where a competitor is ahead and which pages you can improve. The data comes from Google results in the United States and is refreshed every week.

When you find keywords you want to write about, you can add them to a Rankwise Content Planner in one click. Rankwise plans one article a day, writes it with real sources, and publishes it to your blog.

How It Works

Get results in just a few simple steps

1

Enter your website and one competitor

2

We look up the Google keywords each site ranks for

3

We list the keywords the competitor has and you do not

4

We list the keywords you share, with both positions

5

Add the missing keywords to your Content Planner

Common Mistakes to Avoid

Don't make these frequent errors

Comparing with a much bigger site in a different market

Chasing keywords with high difficulty before the easy ones

Copying a competitor's article instead of writing a better one

Ignoring shared keywords where a small update could move you up

Frequently Asked Questions

Where does the keyword data come from?

From Google search results in the United States, through DataForSEO. Search volumes are monthly averages.

Why does a keyword I rank for show as missing?

The tool counts a keyword when a page of your site ranks in the top 100 results. A page that ranks lower, or a page on another domain, does not count.

How often can I use the tool?

A few comparisons an hour. Results for the same two sites are kept for 7 days, so you can open them again at no limit.

See also

Internal Link FinderFind internal linking opportunitiesAI Overviews Eligibility CheckerCheck AI Overview eligibility signalsAI Overview CheckerSee if Google shows an AI Overview and who it citesCopilot Rank TrackerSee if Bing Copilot answers a keyword and who it citesPerplexity Citation TrackerSee which URLs Perplexity cites for any prompt

Related Resources

Dive deeper into these topics with our comprehensive guides and templates.

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Glossary Terms

content strategytopical authority

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