WHAT IS IT?
OpenSEO is an open source, self-hostable SEO platform bundling keyword research, rank tracking, domain analysis, backlink monitoring and technical site audits. Instead of paying a monthly Ahrefs or Semrush subscription, you plug in your own DataForSEO key and only pay for the API calls you actually consume.
WHY IS IT INTERESTING?
- Pay-as-you-go instead of subscription: the tool itself is free; you only pay for the DataForSEO API requests you make (a few dollars to a few dozen depending on usage).
- Self-hosted by default: two official deployment paths, Docker for a quick start and Cloudflare Workers for an edge, multi-user setup.
- Full SEO coverage: research, rank tracking (desktop + mobile with SERP feature detection), domain insights, backlinks and site audits in a single UI.
- Modern, readable stack: TypeScript, Drizzle ORM, Vite and Vitest - easy to fork, read and extend with your own workflows.
- Managed SaaS available: if you want to skip the ops, openseo.so offers the same product with automatic backups and no lock-in on data format.
USE CASES
- Track your target keyword positions without paying 100+ €/month to an SEO SaaS.
- Run recurring technical audits on your client sites from a self-hosted instance.
- Build automated SEO reports by wrapping the DataForSEO API behind a controlled UI.
- Start a freelance SEO practice with variable API costs instead of a fixed subscription.