Build or Bill

SEO and marketing

Keywordgap alternatives

2 open-source projects that already do this job. Free to use - not free to run, which is what the numbers on the right are for.

The full assessment →

The projects

every-app/open-seoOpen source alternative to Semrush and AhrefsOpen on GitHub nowork-studio/notfair-pluginOpen-source SEO, GEO, and marketing skills for AI agents.Open on GitHub

What you give up either way

  • Access to proprietary paid datasets (Ahrefs/Semrush) and their historical coverage
  • Polished UI/UX and product polish (report templates, onboarding)
  • Any bundled commercial API keys and enterprise support
  • Reliability and scale of a hosted SaaS (rate limits, uptime guarantees)

An open-source project doing the core job proves a replacement is possible. It does not prove it matches Keywordgap, and it does not prove anyone has run it for a month. How we decide.