OneGlanse is a free, MIT-licensed, self-hosted GEO (Generative Engine Optimization) tracker that monitors how your brand appears in real AI chat interfaces — ChatGPT, Gemini, Perplexity, Claude, and Google AI Overview. Unlike tools that query model APIs, it uses browser automation via Camoufox (an anti-fingerprint Firefox) and Playwright to capture what users actually see, including inline citations, source cards, and competitor co-mentions. Captured responses are analyzed using your own OpenAI or Anthropic API key to produce GEO scores, sentiment, rank position, and brand perception metrics. The full stack (Next.js 15, PostgreSQL, ClickHouse, Redis) runs locally or on a VPS via Docker, and all data stays on your own infrastructure.