Best Keyword Clustering Tools in 2026
Updated
In short: Topvisor is ranked #1 of 26 as of 3 October 2026, ahead of SEO Algorithm Keyword Clustering and Absolute Cluster. The best-ranked option with a free plan is SEO Algorithm Keyword Clustering. The lowest first paid tier on this page is Keyword Insights at $1/mo.
26 keyword clustering tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
| # | Platform | Score | Why | From | Free plan | Paid from | Clustering method | |
|---|---|---|---|---|---|---|---|---|
| 1 | Topvisor | 7.7 | RecognisedAPIDocumented | $29/mo | Yes | 29 /mo | — | View |
| 2 |  SEO Algorithm Keyword Clustering | 7.5 | RecognisedAPIDocumented | Free | Yes | — | hybrid | View |
| 3 | Absolute Cluster | 7.4 | RecognisedAPIDocumented | $19/mo | Yes | 19 /mo | serp | View |
| 4 |  SEO Keyword Clustering Tool | 7.4 | RecognisedAPIDocumented | — | Yes | — | hybrid | View |
| 5 |  Keyword Insights | 7.2 | RecognisedAPIDocumented | $1/mo | No | — | — | View |
| 6 | beserp Keyword Clustering | 7.1 | RecognisedAPIDocumented | — | Yes | — | semantic | View |
| 7 | ContentGecko Keyword Clustering | 7.1 | RecognisedAPIDocumented | €19.90/mo | Yes | — | serp | View |
| 8 | NeedMyLink Keyword Clustering Tool | 7.0 | RecognisedAPIDocumented | Free | Yes | — | serp | View |
| 9 |  Pro SERP Cluster | 6.9 | RecognisedAPIDocumented | Free | Yes | — | serp | View |
| 10 | Rankable | 6.9 | RecognisedAPIDocumented | $49.50/mo | No | 49.5 /mo | — | View |
| 11 | 100 SEO Tools Keyword Clustering Tool | 6.7 | RecognisedAPIDocumented | Free | Yes | — | hybrid | View |
| 12 | SE Ranking | 6.7 | RecognisedAPIDocumented | $129/mo | No | 103.2 /mo | — | View |
| 13 | Keyword Cupid | 6.5 | RecognisedAPIDocumented | $9.99/mo | No | 9.99 /mo | — | View |
| 14 |  Keyword Clustering | 6.4 | RecognisedAPIDocumented | — | Yes | — | semantic | View |
| 15 | SerpDad | 6.2 | RecognisedAPIDocumented | — | — | — | serp | View |
| 16 |  SEOcluster.ai | 6.2 | RecognisedAPIDocumented | $29/mo | Yes | 29 /mo | — | View |
| 17 |  SEO Clusterizer | 5.9 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 18 |  RankYak Keyword Clustering Tool | 5.9 | RecognisedAPIDocumented | — | Yes | 99 /mo | intent | View |
| 19 |  KeyClusters | 5.7 | RecognisedAPIDocumented | — | No | — | serp | View |
| 20 |  Seonio Keyword Clustering | 5.5 | RecognisedAPIDocumented | — | No | 15 /mo | serp | View |
| 21 | SEO Scout | 5.5 | RecognisedAPIDocumented | $49/mo | No | 49 /mo | — | View |
| 22 |  Keyword Clarity | 5.3 | RecognisedAPIDocumented | — | Yes | — | semantic | View |
| 23 | ClusterView | 5.2 | RecognisedAPIDocumented | — | No | 15 /mo | hybrid | View |
| 24 | Cluster Army Keyword Clusterizer | 5.2 | RecognisedAPIDocumented | — | Yes | — | — | View |
| 25 |  KW Clusterized | 4.9 | RecognisedAPIDocumented | — | — | — | semantic | View |
Is your platform 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 Inferse?
Topvisor is ranked #1 of 26 with a score of 7.7. SEO Algorithm Keyword Clustering is second and Absolute Cluster third.
How many of these have a free plan?
8 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 on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.