OpenSEO

OpenSEO is an open source alternative to Ahrefs and Semrush offering keyword research, backlinks, rank tracking, site audits and AI visibility data, billed by usage and connectable to AI agents over MCP or self-hosted for free.

OpenSEO is an open source SEO platform positioned as an alternative to Ahrefs and Semrush. It covers keyword research, domain overview, backlink inspection, rank tracking and technical site audits, all drawing on DataForSEO data. Instead of a monthly subscription of $100 or more, usage is billed by consumption, and the whole project can be self-hosted for free by anyone who prefers to run and modify it on their own infrastructure. The product is built around AI agents. OpenSEO exposes its tools over MCP, so assistants such as Claude, Codex, OpenClaw, OpenCode and Gemini can run keyword research, competitor analysis and audits directly. Ready-made commands like /seo-coach, /seo-audit, /keyword-research and /competitor-analysis give newcomers a guided starting point. The agent keeps a project context describing the business and preferred writing style, so sessions do not begin from zero, and the research it produces is saved as readable reports rather than raw chat output. Google Search Console and other sources can be connected so the agent works with real site performance. Beyond classic search, OpenSEO includes AI visibility features: tracking brand mentions and citations in AI answers, plus a prompt explorer that compares prompts across supported AI models. Saved keywords let users organize ideas for content planning and ongoing tracking, and the pieces of data are linked to each other inside the web app. The audience is mainly founders, solo operators and small teams who want core SEO data without paying for a large enterprise suite, along with developers who like to inspect or extend the code. Compared with Ahrefs and Semrush, the feature surface is narrower, but the pricing model and the agent-first workflow are the differentiators. Teams that want a hosted experience can sign up without a credit card, while technical users can fork the repository and build custom tooling on top.