Most SEO audit tools still ask the questions search engines cared about ten years ago: is your title tag the right length, do your images have alt text, is your sitemap valid. Those still matter. But a growing chunk of how people find content now goes through an AI assistant instead of a search results page, and almost no audit tool checks whether your site is even reachable by one.
I picked up an open issue on .
Open source alternative to Semrush and Ahrefs
OpenSEO
Open source alternative to Semrush and Ahrefs
OpenSEO is an SEO tool for the people. If tools like Semrush or Ahrefs are too expensive or bloated, OpenSEO is a pay-as-you-go alternative that you actually control.
All-in-one SEO tool for you and your AI agent.
Connect with any agent like Claude Code, OpenClaw or Hermes. We have pre-built skills, but you can build your own to tailor OpenSEO to your needs.
Why use OpenSEO?
- Best in class MCP and AI Skills.
- Modern, simple UI.
- Focused workflows instead of a bloated, complex SEO suite.
- No subscriptions.
- Bring your own DataForSEO API key and pay only for what you use.
- Fork and vibe code your own custom tool.
Main SEO Workflows
- Keyword research
- Rank tracking
- Competitor Insights
- Backlinks
- Site…
The code itself was the easy part. The actual work was reading how someone else already solved similar problems in their codebase before writing a single line — the "how do I avoid noise" and "how do I fit this project's existing shape" questions mattered more than the crawler-detection logic itself.
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