Jan

Jan is an open-source, offline-first AI assistant application that runs entirely on your device without any internet connection required. It supports multiple local models via an OpenAI-compatible API and provides a clean chat interface, model management, and an extension system for additional functionality. Privacy-focused users, users in restricted network environments, and developers wanting to build on a local AI platform use Jan for completely private AI assistance. The application works in airplane mode and stores all conversations locally with no telemetry. Jan's fully offline operation distinguishes it from cloud-based AI tools: every query, every conversation, and every file you share with the AI stays on your device. Its open-source codebase (30,000+ GitHub stars) and extension system have built an active community of contributors.