ContentGecko Keyword Clustering

Overview

ContentGecko Keyword Clustering is a web tool that groups keywords according to overlap in Google search results. It suits SEO and content teams organizing keyword research into pages and clusters, particularly when search-market localization and larger batches matter. Its strongest case is SERP-based grouping with useful controls and exports; it is not a replacement for keyword research that supplies search volume.

Key features

For each keyword, the tool checks Google's top 10 results and groups terms that share URLs. That makes clusters reflect overlap in search results rather than simply similar wording, a useful basis for deciding which terms may belong on one page. Users can choose a country and language, so the results are localized to the target market.

A minimum-overlap setting lets users trade breadth for tighter clusters: raising the threshold demands more shared results. This is a practical control when a broad grouping would combine terms that need separate pages. Users can also add their domain to see its organic rank in the report, and export clusters as CSV for other SEO or content-planning workflows.

The tool does not supply search-volume data; users need a separate keyword research tool for that. Paid plans add search-intent, page-type and marketing-funnel labels, which can help turn groups into planning decisions, as well as clustering history. The free plan uses the standard algorithm, while paid access includes a premium algorithm.

Pricing

The Free version is free and clusters up to 200 keywords in one operation. It includes the standard algorithm and general website support chat. That is enough for smaller batches or an initial workflow, but repeated work across larger keyword sets will quickly run into the cap.

Paid costs 19.90 EUR per month, billed per month. It includes 50,000 keyword credits per month, up to 20,000 keywords per operation, the premium algorithm, intent, page-type and funnel labels, clustering history, and dedicated clustering support. The jump in batch capacity makes it the sensible option for larger research projects; the monthly credits still set an overall usage allowance. The free plan's 200-keyword cap and lack of paid planning labels make it less suitable for sustained, high-volume work.

Platforms

ContentGecko Keyword Clustering is available on the web.

Who it's for

It fits SEO practitioners and content planners who already have keyword lists and need to organize them into groups for content clusters, SEO strategy or avoiding keyword cannibalization. Localization and adjustable overlap help when the target search market or desired cluster tightness matters. Those who need search volumes as part of the same workflow should look elsewhere or pair it with a separate keyword research tool.

Pros and cons

• Pros: Google top-10 URL overlap gives clustering a clear search-results basis, while country, language and minimum-overlap controls let users tailor the grouping.
• Pros: CSV export and optional domain ranking connect the clusters to planning and site-performance workflows.
• Pros: Paid capacity reaches 20,000 keywords per operation, with a 50,000-credit monthly allowance and useful cluster labels.
• Cons: No search-volume data means a separate tool is needed to assess demand.
• Cons: The free version stops at 200 keywords per operation and lacks paid labels, history and dedicated support.

Alternatives

Compare keyword clustering tools if you want to consider the wider category. Choose Absolute Cluster instead if its free plan's 1,000-keyword allowance, content briefs, roadmap, internal-linking map and one article draft better match your workflow.

NeedMyLink Keyword Clustering Tool is a web-based free option with 500 keywords per month, rising by 500 with email. Pro SERP Cluster is another free web option, with up to 500 keywords per clustering run and CSV import and export.

RankYak Keyword Clustering Tool is another freemium alternative, available on web and API. SEO Algorithm Keyword Clustering offers a free Stems plan for up to 200 keywords without signup or credits. Topvisor is a broader freemium web, API and extension option. 100 SEO Tools Keyword Clustering Tool is a free, browser-based option with no signup or limits. SEOcluster.ai offers a free plan with monthly caps across datasets, clustering runs, briefs and content pages.

Verdict

Choose ContentGecko Keyword Clustering if you need localized, adjustable SERP-overlap clusters and a path from small free batches to substantial paid runs. Its CSV output, optional domain ranking and paid cluster labels make it a focused planning tool. Look elsewhere or pair it with another product if search volume is essential, and choose the paid plan only when the free 200-keyword limit no longer fits.