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Business & Commerce

An open-source alternative to Semrush

OpenSEO is the one project in our catalog listed as a replacement for Semrush. It is marketing software with 25.8K GitHub stars. Below is how it measures against the questions people usually ask first.

OpenSEO

Marketing

Open-source SEO research and auditing for people and AI agents.

OpenSEO brings the research, monitoring, and auditing parts of an SEO program into one open platform. Teams can use the hosted service or self-host it, connect their own DataForSEO account, and let an AI agent work with the same underlying data through MCP instead of relying on generic search advice.

  • Researches keywords, search results, competitors, backlinks, and ranking opportunities in connected workflows.
  • Audits websites for technical SEO issues and tracks keyword positions over time.
  • Exposes SEO and Search Console data to Codex, Claude, and other AI agents through MCP.

What people use it for

Keyword and competitor research

Find keyword ideas, inspect live search results, compare competing domains, and organize opportunities for content and rank tracking.

Technical SEO auditing

Crawl a website to surface technical issues, review backlink quality, and monitor search positions across desktop and mobile.

AI-assisted SEO workflows

Connect an AI agent through MCP so it can use real keyword, backlink, competitor, and Search Console data while developing an SEO strategy.

25.8K starsMITTypeScriptLatest release todayWebsite ↗Full profile →

Fact checklist

The same questions the pages with more alternatives let you sort by, answered for OpenSEO.

  • Permissive licence (MIT, Apache, BSD)Licence: MIT (permissive)
  • Open-source licence (copyleft or permissive)Licence: MIT (permissive)
  • Released in the last 90 daysLatest GitHub release Oct 31, 2026 (today)
  • Gaining stars this week+1092 stars in the last 7 days
  • Written in TypeScriptMain language on GitHub
  • Recommended in a stackIn Marketing agency

Data from GitHub and our catalog. Every listing is hand-approved. List prices are what the vendor publishes, not a quote, and self-hosting has its own running costs.