No. 3of 27 ·Keyword Clustering Tools

Cluster Army Keyword Clusterizer

Web

Freedom report

Two barsScore 6.4

Free tierA free tier is on its own pricing page
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Cluster Army Keyword Clusterizer is ranked #3 of 27 in keyword clustering tools on Freedom251. It runs on Web. There is a free plan.

Cluster Army Keyword Clusterizer plans and pricing

All plans

Free Keyword Clusterizer Free Unlimited use · 2MB max TXT upload · 50,000 text rows max · Downloads available for 10 minutes cluster.army · 9 Oct 2026

Compared on keyword clustering tools

Free plan: Yes
Batch upload: Yes
Export formats: CSV

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The record

Purpose: Cluster Army is a free tool for generating keyword clusters from a list of terms.
Clustering: It analyzes stem, single-word, pair, and triple distributions, then associates each starting keyword with frequent terms to create clusters.
Input formats: You can paste text or upload a .txt file with one word or phrase per line; uploads are limited to 2 MB and text input to 50,000 rows.
Languages: The Clusterizer offers English and Italian settings and can exclude standard stopwords for the chosen language.
Custom exclusions: You can enter additional words to exclude from single-key associations.
Exports: It generates five downloadable files covering stem, individual-term, pair, triple, and complete-cluster results, available for 10 minutes after processing.
Visualization: The tool generates a chart for each distribution and provides a mind map with expand, collapse, and download controls.
Integration: A list generated with Cluster Army's Long Tail Generator can be imported into the Clusterizer with one click.
Intended use: The site describes keyword grouping as a way to organize related terms and analyze search intent for SEO content optimization.
Privacy: Cluster Army's privacy policy says it uses only technical session cookies and does not use analytics, tracking pixels, or third-party cookies.
Data security: The privacy policy says session data is stored on its servers with industry-standard security measures and automatically deleted when a session expires or the user logs out.
Maker: Cluster Army is operated by EVE Milano by Searcus Swiss SAGL, a consultancy whose site says it has operated since 2010.
Analysis: It calculates distributions for stems, individual terms, keyword pairs, and triples, then associates keywords with the most frequent terms to create clusters.
Charts: The tool generates a chart for each term distribution.
Price from: Free

Where it ranks on Freedom251

Best Keyword Clustering Tools in 2026#3 of 27

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Sources

cluster.army/clusterizer/· checked 9 Oct 2026
cluster.army/privacy-policy/· checked 9 Oct 2026
searcus.ch/it/· checked 9 Oct 2026