Freemium
Added on Oct 28,2026
OpenSEO is an open-source SEO platform that brings keyword research, rank tracking, backlinks, site audits, AI visibility and Google Search Console data into one workspace, positioned as a free alternative to suites like Ahrefs and Semrush.
The app, API, crawler and agent server are all MIT licensed, so teams can read the code, change it and run the whole suite on their own computer or server with Docker, keeping keywords, rankings and audits in their own database.
Key features include keyword overview with difficulty, volume by country and the live top 10, keyword ideas and questions, a SERP checker for any city or region, domain overview, page analysis, backlink history and competitor keyword gap reports.
It also offers rank tracking on desktop and mobile, a free site audit crawler with 117 technical checks and Lighthouse, local search volume by city, and a Google Maps local rank checker that uses geo-grids to show who ranks across a town.
An AI visibility checker asks ChatGPT, Gemini, Claude and Perplexity the same question with web search on and shows which sites each one cites, and prompt tracking covers more than 120 AI models.
For AI agents, OpenSEO provides an SEO MCP server with 76 tools and a REST API that work with Claude, ChatGPT, Cursor, VS Code, Codex, Gemini CLI, Windsurf and other MCP clients, with every paid call showing its price and staying under a set spending limit.
Pricing: the hosted app at openseo.gg is free with every feature, and self-hosting is also free. Keyword, ranking and backlink data comes from YepAPI and is paid per lookup under a monthly limit you choose, while Search Console reports and site audits are free.
It is suited to marketers, SEO consultants, small businesses and developers who want full SEO tooling without a fixed subscription, or who want to give their AI agent controlled access to SEO data.
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