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Head-to-head · Keyword Clustering Tools

SEO Algorithm Keyword Clustering vs ContentGecko Keyword Clustering

  • Updated Oct 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score SEO Algorithm Keyword Clustering #3 in Keyword Clustering Tools 9.1/10 Free plan Free plan✓ 2 of 3 features Visit SEO Algorithm
ContentGecko Keyword Clustering #8 in Keyword Clustering Tools 8.5/10 Free plan Free plan✓ 2 of 3 features Visit ContentGecko

SEO Algorithm Keyword Clustering leads on 0 checks, ContentGecko Keyword Clustering on 0, and 3 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSEO Algorithm Keyword Clustering · 9.1/10
  • Free planboth

SEO Algorithm Keyword Clustering scores higher on our rubric for keyword clustering tools: 9.1 against 8.5 out of 10; our editors rank them #3 and #8.

On clustering method, SEO Algorithm Keyword Clustering gives you Hybrid where ContentGecko Keyword Clustering offers Serp.

SEO Algorithm Keyword Clustering is the better fit for flexible hybrid clustering with manual control. ContentGecko Keyword Clustering is the better fit for large country-specific SERP clustering projects.

  • SEO Algorithm Keyword Clustering fits best

    Flexible hybrid clustering with manual control

  • ContentGecko Keyword Clustering fits best

    Large country-specific SERP clustering projects

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Side by side

Feature SEO Algorithm Keyword Clustering 9.1/10 Visit ↗ ContentGecko Keyword Clustering 8.5/10 Visit ↗
At a glance
Editor score 9.1 8.5
Ranking #3 in Keyword Clustering Tools #8 in Keyword Clustering Tools
Best for Flexible hybrid clustering with manual control Large country-specific SERP clustering projects
Pricing model Free plan + paid Free plan + paid
Starting price Free plan €19.90/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud Cloud
Platforms Web Web
Built for Small business, Mid-market Solo, Small business, Mid-market
Features SEO Algorithm Keyword Clustering 2/3 · ContentGecko Keyword Clustering 2/3
SERP analysis ✓ ✓
Batch upload ✓ ✓
API access Not checked yet Not checked yet
Specs
Clustering method Hybrid Serp
Keyword limit Not checked yet 20000 keywords
Export formats CSV, XLSX, Google Sheets CSV
Our review
Pros
  • Three clustering methods cover stems, semantics, and live SERP overlap
  • Manual creation, merging, editing, intent filtering, and sorting
  • Exports to CSV, XLSX, and Google Sheets
  • Clusters up to 20,000 keywords at once on the paid plan
  • Supports country, language and configurable SERP-overlap settings
  • Exports keyword clusters as CSV and checks optional domain rankings
Cons
  • AI Semantic and SERP-based runs consume credits
  • Available through the web platform only
  • SERP clustering is based on Google top-10 overlap
  • The free version is limited to 200 keywords per operation
  • Intent, page-type and funnel labels require the paid version
  • Available as a web tool rather than a desktop or mobile application
Our verdict

SEO Algorithm Keyword Clustering is a web-based keyword-grouping tool for SEO professionals, content teams, and marketers who need more control than a single clustering method provides. It offers word-stem grouping, AI semantic clustering,…

Read the review →

ContentGecko Keyword Clustering groups keywords according to similarity in Google search results. It fetches the top 10 results for each keyword, compares overlapping URLs, and forms clusters using a configurable SERP-overlap threshold.…

Read the review →
  1. SEO Algorithm Keyword ClusteringKeyword Clustering Tools 9.1Free plan
  2. ContentGecko Keyword ClusteringKeyword Clustering Tools 8.5Free plan

Strengths and trade-offs

  • SEO Algorithm Keyword Clustering — where it wins

    • Three clustering methods cover stems, semantics, and live SERP overlap
    • Manual creation, merging, editing, intent filtering, and sorting
    • Exports to CSV, XLSX, and Google Sheets

    Where it doesn't

    • AI Semantic and SERP-based runs consume credits
    • Available through the web platform only
    • SERP clustering is based on Google top-10 overlap

  • ContentGecko Keyword Clustering — where it wins

    • Clusters up to 20,000 keywords at once on the paid plan
    • Supports country, language and configurable SERP-overlap settings
    • Exports keyword clusters as CSV and checks optional domain rankings

    Where it doesn't

    • The free version is limited to 200 keywords per operation
    • Intent, page-type and funnel labels require the paid version
    • Available as a web tool rather than a desktop or mobile application

More comparisons

All keyword clustering tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update