Seonio Keyword Clustering review
A focused SERP-clustering tool with keyword expansion and API access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Seonio Keyword Clustering groups related search terms by analyzing overlapping Google search results. It is designed for SEO professionals, content teams, marketers, and agencies planning pillar pages, supporting articles, content silos, and information architecture. A typical workflow starts with a seed keyword, expands it into a keyword universe, retrieves SERP data, and organizes terms into topic clusters. Results include cluster keywords, combined search volume, shared ranking URLs, competing pages, and uncategorized keywords.
Pricing is paid-only, with Starter at $15 per month or $120 per year, Pro at $30 per month or $240 per year, and Business at $60 per month or $480 per year. Each listed plan includes the website tools, REST API, and MCP, along with a 20 requests-per-second account limit. The main plan distinction shown is the included monthly usage allocation, while the core access and rate limit are consistent across the plans. That structure suits buyers who want recurring programmatic access and can choose a tier based on expected usage.
Its strongest differentiator is the combination of SERP-overlap clustering and expansion features. Weighted keyword network mapping with Louvain clustering, cluster-head keywords, combined search volume, shared ranking URLs, and top organic competing-page analysis give teams several ways to interpret a topic set. The REST API and MCP also make it a practical fit for automated SEO workflows. Choose it if Google SERP relationships and programmatic access are central to your process. Choose another tool if you need a free ongoing plan, a broader all-in-one SEO suite, or workflows outside this SERP-focused approach.
Seonio Keyword Clustering pros and cons
- Where it wins
- Clusters keywords by overlapping Google search results
- Expands seed terms into a mapped keyword universe
- Includes REST API and MCP access across paid plans
- Where it doesn't
- No free plan for ongoing use
- Account limit is 20 requests per second
- Focused on SERP-based clustering rather than broader SEO workflows
Seonio Keyword Clustering fact sheet, pricing and score →
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