DocuChat offers lawyers a self-hosted, offline AI tool with verified citations

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DocuChat is an open-source, locally hosted document chat application built specifically for legal professionals who need to query sensitive files without exposing them to third-party cloud services. The tool runs entirely on a lawyer's own machine using local AI models via Ollama, a FastAPI backend, and a LanceDB vector store, requiring no API keys from providers like OpenAI or Google. A key feature is its citation verification system, which checks whether any source quote proposed by the AI model actually appears in the retrieved document at the claimed location — dropping unverifiable claims rather than displaying them. The app supports contracts, deposition transcripts, pleadings, scanned PDFs, and discovery bundles, with matter-scoped retrieval to prevent data from one client file bleeding into another. The project is available on GitHub, where its developers are seeking community validation to continue development.

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