OpenSEO

openseo.so

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Open-source, self-hosted alternative to Semrush and Ahrefs — keyword research, rank tracking, backlinks, and site audits you host yourself.

Why it is useful

OpenSEO is MIT-licensed and deploys via Docker or Cloudflare, so instead of paying $99+/month for a SaaS seat you bring your own DataForSEO API key and pay only for the data you pull. It also ships a Model Context Protocol (MCP) server, letting AI coding agents run SEO audits and keyword research directly as part of a workflow.