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SEO Clusterizer
What it is
SEO Clusterizer groups semantically similar search queries to support website structure and content planning. It offers eight clustering algorithms, including semantic analysis, hierarchical clustering, multilingual stemming, rare-word weighting, and tolerance for spelling variants. Its SERP mode 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 examines Google Top 10 competitor text to identify missing terms. Inputs include exports from Serpstat, Ahrefs, SEMrush, and Google Keyword Planner, plus CSV, TSV, and TXT files. Results can be exported as CSV, JSON, TSV, Markdown, or XLSX; JSON is positioned for developer and CMS integrations. Basic clustering runs locally in the browser, while premium AI, SERP, and content-analysis requests run on the server and are not used to train models. Free includes up to 500 keywords per run and five clusterings daily. Pro costs $29 a month; Agency costs $89 a month.
For and against
For
- Eight clustering algorithms
- Supports multilingual stemming and spelling variants
- Exports CSV, JSON, TSV, Markdown, and XLSX
- Local browser clustering does not upload lists
- Free plan available
Against
- Free limited to 500 keywords per run
- Free history lasts seven days
- Premium requests are server-processed
The verdict
SEO Clusterizer combines query clustering with SERP and content-analysis tools across web and API access. Its free limits and separate server processing for premium features matter when planning larger workflows.
Who it suits
It is intended for SEO specialists, content managers, and marketers planning topics or site structure. It fits users who need keyword clustering, intent analysis, or content-gap work.
Plans and prices
Free
Up to 500 keywords per run · 5 clusterings per day · 8 clustering algorithms · CSV, JSON, TSV export
Read 11 Oct 2026 · seoclusterizer.com
Pro
Up to 15,000 keywords per run · 100 clusterings per day · AI methods (20/day) · Content Analyzer (100/day)
Read 11 Oct 2026 · seoclusterizer.com
Agency
Up to 50,000 keywords per run · 500 clusterings per day · AI methods (100/day) · Content Analyzer (500/day)
Read 11 Oct 2026 · seoclusterizer.com
Enterprise
Custom limits · Unlimited quotas · Dedicated capacity · SLA guarantees
Read 11 Oct 2026 · seoclusterizer.com
On the record
- 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 · read 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 · read 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 · read 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 · read 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 · read 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 · read 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 · read 11 Oct 2026
- Intended users
- The About page identifies SEO specialists, content managers, and marketers as intended users.seoclusterizer.com · read 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 · read 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 · read 11 Oct 2026
- Purpose
- The product automatically groups semantically similar search queries into clusters to help plan site structure and content strategy.seoclusterizer.com · read 11 Oct 2026
- SERP clustering
- Its SERP feature groups keywords using overlap among ranking URLs, with results cached for 14 days.seoclusterizer.com · read 11 Oct 2026
