Best Keyword Clustering Tools in 2026
Updated
When keyword research spans many search terms, clustering tools can help group them into sets for planning and analysis. Compared on clustering method and SERP analysis, these options also differ in keyword limits, batch upload, and the export formats available for moving results into your workflow. API access and a free plan may matter for how you use a tool, while paid-from pricing offers cost context. The entries include 100 SEO Tools Keyword Clustering Tool, Absolute Cluster, and ContentGecko Keyword Clustering. Check how each handles your input volume and the outputs you need, then weigh the listed access and pricing details against your research process.
14 of 21 with known pricing have a free tier;0 apps show full bars: free, open, on most devices and documented.
| # | App | Signal | Free tier | Open code | Devices | From | Score |
|---|---|---|---|---|---|---|---|
| 1 | Absolute ClusterWeb | Two bars | 1 of 6 | $19/mo | 6.4 | ||
| 2 | beserp Keyword ClusteringWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 3 | Cluster Army Keyword ClusterizerWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 4 | ContentGecko Keyword ClusteringWeb | Two bars | 1 of 6 | €19.90/mo | 6.4 | ||
| 5 | Keyword ClusteringWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 6 | NeedMyLink Keyword Clustering ToolWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 7 | Pro SERP ClusterWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 8 | RankYak Keyword Clustering ToolWeb · API | Two bars | 1 of 6 | $99/mo | 6.4 | ||
| 9 | SEO Algorithm Keyword ClusteringWeb | Two bars | 1 of 6 | Free | 6.4 | ||
| 10 | SEOcluster.aiWeb | Two bars | 1 of 6 | $29/mo | 6.4 | ||
| 11 | Seonio Keyword ClusteringWeb | Two bars | 1 of 6 | $0.63/mo | 6.4 | ||
| 12 | TopvisorWeb · API · Extension | Two bars | 1 of 6 | $29/mo | 6.4 | ||
| 13 | 100 SEO Tools Keyword Clustering ToolWeb | Two bars | 1 of 6 | Free | 6.3 | ||
| 14 | Keyword ClarityWeb | Two bars | 1 of 6 | Free | 6.3 | ||
| 15 | KW ClusterizedWeb · Windows · Mac · Linux · Android · iPhone · Self-hosted · API · Extension | Two bars | 6 of 6 | 5.8 | |||
| 16 | SEO Keyword Clustering ToolWeb · Windows · Mac · Linux · Self-hosted | Two bars | 4 of 6 | 5.7 | |||
| 17 | OptiwingWeb | One bar | 1 of 6 | $20/mo | 5.4 | ||
| 18 | Keyword InsightsWeb · API | One bar | No | 1 of 6 | $1/mo | 5.1 | |
| 19 | ClusterViewWeb | One bar | No | 1 of 6 | $15/mo | 5.0 | |
| 20 | KeyClustersWeb | One bar | No | 1 of 6 | 5.0 | ||
| 21 | Keyword CupidWeb | One bar | No | 1 of 6 | $9.99/mo | 5.0 | |
| 22 | RankableWeb · API | One bar | No | 1 of 6 | $49.50/mo | 5.0 | |
| 23 | SEO ClusterizerWeb | No signal | 1 of 6 | 5.0 | |||
| 24 | SEO ScoutWeb | One bar | No | 1 of 6 | $49/mo | 5.0 | |
| 25 | SerpDadWeb | One bar | No | 1 of 6 | $15.83/mo | 5.0 |
Compare all 25 in a table
| # | App | Score | Free plan | From | Free plan | Paid from | Clustering method | Keyword limit |
|---|---|---|---|---|---|---|---|---|
| 1 | Absolute Cluster | 6.4 | Free plan | $19/mo | Yes | 19 /mo | serp | |
| 2 | beserp Keyword Clustering | 6.4 | Free plan | Free | Yes | semantic | ||
| 3 | Cluster Army Keyword Clusterizer | 6.4 | Free plan | Free | Yes | |||
| 4 | ContentGecko Keyword Clustering | 6.4 | Free plan | €19.90/mo | Yes | serp | 20,000 keywords | |
| 5 | Keyword Clustering | 6.4 | Free plan | Free | Yes | semantic | ||
| 6 | NeedMyLink Keyword Clustering Tool | 6.4 | Free plan | Free | Yes | serp | ||
| 7 | Pro SERP Cluster | 6.4 | Free plan | Free | Yes | serp | 500 keywords | |
| 8 | RankYak Keyword Clustering Tool | 6.4 | Free plan | $99/mo | Yes | 99 /mo | intent | |
| 9 | SEO Algorithm Keyword Clustering | 6.4 | Free plan | Free | Yes | hybrid | ||
| 10 | SEOcluster.ai | 6.4 | Free plan | $29/mo | Yes | 29 /mo | ||
| 11 | Seonio Keyword Clustering | 6.4 | Free plan | $0.63/mo | No | 15 /mo | serp | |
| 12 | Topvisor | 6.4 | Free plan | $29/mo | Yes | 29 /mo | ||
| 13 | 100 SEO Tools Keyword Clustering Tool | 6.3 | Free plan | Free | Yes | hybrid | ||
| 14 | Keyword Clarity | 6.3 | Free plan | Free | Yes | semantic | ||
| 15 | KW Clusterized | 5.8 | semantic | |||||
| 16 | SEO Keyword Clustering Tool | 5.7 | Yes | hybrid | ||||
| 17 | Optiwing | 5.4 | $20/mo | Yes | serp | 1,000 keywords | ||
| 18 | Keyword Insights | 5.1 | No | $1/mo | No | |||
| 19 | ClusterView | 5.0 | No | $15/mo | No | 15 /mo | hybrid | 20 keywords |
| 20 | KeyClusters | 5.0 | No | No | serp | 2,500 keywords | ||
| 21 | Keyword Cupid | 5.0 | No | $9.99/mo | No | 9.99 /mo | ||
| 22 | Rankable | 5.0 | No | $49.50/mo | No | 49.5 /mo | ||
| 23 | SEO Clusterizer | 5.0 | Yes | |||||
| 24 | SEO Scout | 5.0 | No | $49/mo | No | 49 /mo | ||
| 25 | SerpDad | 5.0 | No | $15.83/mo | serp |
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