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Head-to-head · Keyword Clustering Tools

Optiwing vs ContentGecko Keyword Clustering

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score Optiwing #1 in Keyword Clustering Tools 9.4/10 Free plan Free plan✓ 2 of 3 features Visit Optiwing
ContentGecko Keyword Clustering #8 in Keyword Clustering Tools 8.5/10 Free plan Free plan✓ 2 of 3 features Visit ContentGecko

Optiwing leads on 0 checks, ContentGecko Keyword Clustering on 1, and 3 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOptiwing · 9.4/10
  • Free planboth

Optiwing scores higher on our rubric for keyword clustering tools: 9.4 against 8.5 out of 10; our editors rank them #1 and #8.

ContentGecko Keyword Clustering leads on keyword limit: 20000 keywords versus 1000 keywords.

Optiwing is the better fit for localized SERP clustering in a browser workflow. ContentGecko Keyword Clustering is the better fit for large country-specific SERP clustering projects.

  • Optiwing fits best

    Localized SERP clustering in a browser workflow

  • ContentGecko Keyword Clustering fits best

    Large country-specific SERP clustering projects

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Side by side

Feature Optiwing 9.4/10 Visit ↗ ContentGecko Keyword Clustering 8.5/10 Visit ↗
At a glance
Editor score 9.4 8.5
Ranking #1 in Keyword Clustering Tools #8 in Keyword Clustering Tools
Best for Localized SERP clustering in a browser workflow Large country-specific SERP clustering projects
Pricing model Free plan + paid Free plan + paid
Starting price $20/mo €19.90/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Browser extension Cloud
Platforms Web, Chrome extension Web
Support Email Email, Live chat
Built for Solo, Small business, Mid-market Solo, Small business, Mid-market
Features Optiwing 2/3 · ContentGecko Keyword Clustering 2/3
SERP analysis ✓ ✓
Batch upload ✓ ✓
API access Not checked yet Not checked yet
Specs
Clustering method Serp Serp
Keyword limit 1000 keywords 20000 keywords (best)
Export formats CSV, Excel, JSON CSV
Our review
Pros
  • Clusters keywords from live Google results and shared top-10 URLs
  • Supports geography, device targeting, bulk CSV uploads, and 1,000 keywords
  • Connects with Ahrefs, Semrush, Google Sheets, and Keyword Planner
  • 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
  • Paid usage is credit-based, with one credit required per grouped keyword
  • The free allowance is limited to 100 credits
  • The browser workflow may not suit teams seeking a standalone desktop tool
  • 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

Optiwing is a browser-based SEO platform for freelancers, content teams, agencies, and small businesses that need to organize keyword research around actual search results. Its core workflow analyzes live Google SERPs and groups keywords…

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. OptiwingKeyword Clustering Tools 9.4Free plan
  2. ContentGecko Keyword ClusteringKeyword Clustering Tools 8.5Free plan

Strengths and trade-offs

  • Optiwing — where it wins

    • Clusters keywords from live Google results and shared top-10 URLs
    • Supports geography, device targeting, bulk CSV uploads, and 1,000 keywords
    • Connects with Ahrefs, Semrush, Google Sheets, and Keyword Planner

    Where it doesn't

    • Paid usage is credit-based, with one credit required per grouped keyword
    • The free allowance is limited to 100 credits
    • The browser workflow may not suit teams seeking a standalone desktop tool

  • 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
  • Optiwing9.4/10 · Free plan

    A browser-based SEO workspace for localized clustering, bulk analysis, and content planning.

    Visit OptiwingFull verdict →
  • ContentGecko Keyword Clustering8.5/10 · Free plan

    A focused SERP clustering tool with generous paid batch capacity and useful exports.

    Visit ContentGeckoFull verdict →

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