Best Keyword Clustering Tools in 2026
Updated
In short: Absolute Cluster is ranked #1 of 27 as of 4 October 2026, ahead of ContentGecko Keyword Clustering and SEO Algorithm Keyword Clustering. The best-ranked option with a free plan is ContentGecko Keyword Clustering. The lowest first paid tier on this page is Keyword Insights at $1/mo.
Turning a long set of search terms into organized groups can support keyword research and content planning. These tools are ranked with comparisons for clustering method, SERP analysis, batch upload, and keyword limit. You can also weigh export formats, API access, free-plan availability, and paid-from pricing as you consider the workflow and cost. SEO Algorithm Keyword Clustering leads the entries shown, with Absolute Cluster and SEO Keyword Clustering Tool also near the top. Check how you will bring in keyword data, what kind of grouping approach you need, and whether the available limits and exports fit the work you intend to do.
27 keyword clustering tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Absolute Cluster No phone app RecognisedPhone appDocumentedFree plan 6.4$19/mo Clustering method: serpSERP analysis: Yes
- 2 ContentGecko Keyword Clustering No phone app RecognisedPhone appDocumentedFree plan 6.4€19.90/mo Clustering method: serpKeyword limit: 20,000 keywordsSERP analysis: Yes
- 3 SEO Algorithm Keyword Clustering No phone app RecognisedPhone appDocumentedFree plan 6.4Free Clustering method: hybridSERP analysis: Yes
- 4 Topvisor No phone app RecognisedPhone appDocumentedFree plan 6.4$29/mo
- 5 100 SEO Tools Keyword Clustering Tool No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clustering method: hybridSERP analysis: Yes
- 6 NeedMyLink Keyword Clustering Tool No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clustering method: serpSERP analysis: Yes
- 7 Pro SERP Cluster No phone app RecognisedPhone appDocumentedFree plan 6.3Free Clustering method: serpKeyword limit: 500 keywordsSERP analysis: Yes
- 8 RankYak Keyword Clustering Tool No phone app RecognisedPhone appDocumentedFree plan 6.3$99/mo Clustering method: intentSERP analysis: No
- 9 SEOcluster.ai No phone app RecognisedPhone appDocumentedFree plan 6.2$29/mo
- 10 SEO Keyword Clustering Tool No phone app RecognisedPhone appDocumentedFree plan 5.9 Clustering method: hybridSERP analysis: Yes
- 11 Optiwing No phone app RecognisedPhone appDocumentedFree plan 5.7$20/mo Clustering method: serpKeyword limit: 1,000 keywordsSERP analysis: Yes
- 12 Rankable No phone app RecognisedPhone appDocumentedFree plan 5.6$49.50/mo
- 13 SEO Scout No phone app RecognisedPhone appDocumentedFree plan 5.6$49/mo
- 14 SE Ranking No phone app RecognisedPhone appDocumentedFree plan 5.5$129/mo
- 15 Keyword Cupid No phone app RecognisedPhone appDocumentedFree plan 5.4$9.99/mo SERP analysis: Yes
- 16 Keyword Insights No phone app RecognisedPhone appDocumentedFree plan 5.4$1/mo
- 17 beserp Keyword Clustering No phone app RecognisedPhone appDocumentedFree plan 5.3 Clustering method: semanticSERP analysis: Yes
- 18 Cluster Army Keyword Clusterizer No phone app RecognisedPhone appDocumentedFree plan 5.3
- 19 Keyword Clustering No phone app RecognisedPhone appDocumentedFree plan 5.3 Clustering method: semanticSERP analysis: No
- 20 KW Clusterized No phone app RecognisedPhone appDocumentedFree plan 5.3 Clustering method: semanticSERP analysis: No
- 21 ClusterView No phone app RecognisedPhone appDocumentedFree plan 5.2 Clustering method: hybridKeyword limit: 20 keywordsSERP analysis: Yes
- 22 Keyword Clarity No phone app RecognisedPhone appDocumentedFree plan 5.2 Clustering method: semantic
- 23 SerpDad No phone app RecognisedPhone appDocumentedFree plan 5.2 Clustering method: serpSERP analysis: Yes
- 24 KeyClusters No phone app RecognisedPhone appDocumentedFree plan 5.1 Clustering method: serpKeyword limit: 2,500 keywordsSERP analysis: Yes
- 25 Seonio Keyword Clustering No phone app RecognisedPhone appDocumentedFree plan 5.1 Clustering method: serpSERP analysis: Yes
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which keyword clustering tool is ranked first on Samsung Mobile US Press?
Absolute Cluster is ranked #1 of 27 with a score of 6.4. ContentGecko Keyword Clustering is second and SEO Algorithm Keyword Clustering third.
How many of these have a free plan?
9 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Keyword Insights has the lowest first paid tier we found: $1/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.