FREEDOM251

Freedom251 › Content Optimization Software

SEO Clusterizer

Free plan APIWeb

Visit SEO Clusterizer Alternatives Pricing

SEO Clusterizer's own site

What SEO Clusterizer is

SEO Clusterizer groups semantically similar search queries into clusters to help plan site structure and content strategy. It describes eight algorithms, including semantic analysis, hierarchical clustering, multilingual stemming, rare-word weighting, and tolerance for spelling variants. Its SERP feature groups keywords by overlap among ranking URLs, with results cached for 14 days. Content Analyzer scores pages across 20 quality factors and creates a content brief, while The Force analyzes Google Top 10 competitor text and identifies missing terms. Inputs can include exports from Serpstat, Ahrefs, SEMrush, and Google Keyword Planner, as well as CSV, TSV, and TXT files. Exports are available in CSV, JSON, TSV, Markdown, and XLSX; JSON is described as suitable for developer and CMS integrations. Basic algorithmic clustering runs locally in the browser, while premium AI, SERP, and content-analysis requests are processed on the server and are not used to train models. Free allows up to 500 keywords per run and five clusterings per day. Pro costs $29 a month, and Agency costs $89 a month.

Who it suits

SEO specialists, content managers, and marketers can use SEO Clusterizer to organize keyword lists and plan content. Its API and JSON export may also suit developer or CMS workflows.

What it does well

  • Eight clustering algorithms
  • Accepts exports from major keyword tools
  • Exports CSV, JSON, TSV, Markdown, and XLSX
  • Basic clustering runs locally in the browser
  • Free plan allows 500 keywords per run

What to know first

  • Free plan allows five clusterings per day
  • SERP results are cached for 14 days
  • Agency and Pro history limits differ

Limits

Free supports up to 500 keywords per run and five clusterings per day, with 7-day project history. Its listed exports are CSV, JSON, and TSV; Pro and Agency list larger quotas, bulk mode, and longer or unlimited history.

Plans

PlanBilled and limitsPrice
FreeUp to 500 keywords per run · 5 clusterings per day · 8 clustering algorithms · CSV, JSON, TSV export · 30+ languages · Cluster visualizationFree
ProUp to 15,000 keywords per run · 100 clusterings per day · AI methods (20/day) · Content Analyzer (100/day) · The Force (30/day) · SERP (2,000 keywords/month) · Ahrefs (5,000 keywords/month) · API (1,000 calls/month) · 90-day history · Priority support$29 a month
AgencyUp to 50,000 keywords per run · 500 clusterings per day · AI methods (100/day) · Content Analyzer (500/day) · The Force (150/day) · SERP (15,000 keywords/month) · Ahrefs (25,000 keywords/month) · API (10,000 calls/month) · Unlimited history · Priority 24/7 support$89 a month
EnterpriseCustom limits · Unlimited quotas · Dedicated capacity · SLA guarantees · Dedicated managerOn request

As seoclusterizer.com lists them, read 11 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open https://seoclusterizer.com/ in a web browser.
  2. Choose the Free plan or review the paid Pro and Agency plans.
  3. Import keywords from a supported tool export, or provide a CSV, TSV, or TXT file.
  4. Run a clustering method and review the visualization.
  5. Export results as CSV, JSON, TSV, Markdown, or XLSX.

Verdict

SEO Clusterizer combines keyword clustering with SERP grouping and content analysis, with a free tier and paid plans at $29 a month for Pro and $89 a month for Agency. Check the per-plan quotas and history periods against your workload before choosing a plan.

Questions

Is SEO Clusterizer free?

Yes. Its Free plan costs nothing and allows up to 500 keywords per run and five clusterings per day.

What do the paid plans cost?

Pro costs $29 a month and Agency costs $89 a month. Enterprise has custom limits, but no price is listed.

What platforms does it support?

SEO Clusterizer is available on the web and through an API.

Can I use my existing keyword exports?

The FAQ says it supports exports from Serpstat, Ahrefs, SEMrush, and Google Keyword Planner, along with CSV, TSV, and TXT files.

Are keyword lists uploaded for clustering?

Basic algorithmic clustering runs locally in the browser, and keyword lists are not uploaded. Premium AI, SERP, and content-analysis requests run on its server and are not used to train models.

How long is project history kept?

History lasts 7 days on Free, 90 days on Pro, and is unlimited on Agency.

Facts from SEO Clusterizer's own pages

Bulk analysis
Pro and Agency include bulk mode for XLSX or CSV URL lists, producing a single XLSX report with a separate tab for each site. · seoclusterizer.com, 11 Oct 2026
Company identity
The About page describes SEO Clusterizer as a tool created by SEO specialists for SEO specialists and lists [email protected] as its contact. · seoclusterizer.com, 11 Oct 2026
Content tools
Content Analyzer scores pages across 20 quality factors and generates a content brief, while The Force analyzes Google Top 10 competitor text and identifies missing terms. · seoclusterizer.com, 11 Oct 2026
Credential security
The site says credentials for external services are stored server-side in encrypted storage and are not exposed in page code or the browser. · seoclusterizer.com, 11 Oct 2026
Exports and integrations
The site lists CSV, JSON, TSV, Markdown, and XLSX exports; JSON is described as suitable for developer and CMS integrations. · seoclusterizer.com, 11 Oct 2026
History limits
The site states project history lasts 7 days on Free, 90 days on Pro, and is unlimited on Agency. · seoclusterizer.com, 11 Oct 2026
Input compatibility
The FAQ says it supports exports from Serpstat, Ahrefs, SEMrush, and Google Keyword Planner, along with CSV, TSV, and TXT files. · seoclusterizer.com, 11 Oct 2026
Intended users
The About page identifies SEO specialists, content managers, and marketers as intended users. · seoclusterizer.com, 11 Oct 2026
Methods
The site describes eight clustering algorithms, including rare-word weighting, semantic analysis, hierarchical clustering, multilingual stemming, and spelling-variant tolerance. · seoclusterizer.com, 11 Oct 2026
Privacy
The site says basic algorithmic clustering runs locally in the browser and keyword lists are not uploaded; it says premium AI, SERP, and content-analysis requests are processed on its server and are not used to train models. · seoclusterizer.com, 11 Oct 2026
Purpose
The product automatically groups semantically similar search queries into clusters to help plan site structure and content strategy. · seoclusterizer.com, 11 Oct 2026
SERP clustering
Its SERP feature groups keywords using overlap among ranking URLs, with results cached for 14 days. · seoclusterizer.com, 11 Oct 2026

Where SEO Clusterizer stands on Freedom251

Look at these too