
Open source alternative to Semrush and Ahrefs
Connect to your AI Agent in 2 minutes. Get expert level advice tailored to your business backed by real data like keyword search traffic, backlinks, and technical audits of your site. Here are some good skills to start with: /seo-audit What 1-2 changes to your website will drive more traffic? /keyword-research Find topics worth writing about? /competitor-analysis Understand your competitors’ SEO strategy.
OpenSEO builds an open-source SEO platform that gives founders and marketers keyword research, backlink analysis, rank tracking, site auditing, and AI-brand visibility tools, replacing paid subscriptions to tools like Semrush and Ahrefs. It also exposes SEO data directly to AI agents via an MCP server, letting tools such as Claude and Codex run keyword research, audits, and competitor analysis without a human in the loop.
Entrepreneurs and indie founders adopt it self-serve, drawn by the open-source repo and a two-minute MCP setup that plugs OpenSEO data into whichever AI client they already use.
A free tier with no credit card required, plus paid plans.
GPAgent keeps YC listings public and neutral. Fund-specific scoring, notes, and workflow state live in each customer workspace.
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