An open-source, offline-first desktop app for running AI models locally — a private ChatGPT alternative.
Jan is a desktop application that runs language models on your own machine. It downloads and manages open-weight models, serves them locally, and presents a clean chat interface — all without an account or a network connection.
It can also connect to hosted providers when you want them, but its reason for existing is the offline case: a usable assistant that keeps every message on the device.
Where it's ideally used
A fit for individuals or teams who want a local AI assistant with a hard guarantee that conversations never leave the machine.
Where it doesn't fit
Not built for multi-user deployment — for a shared internal assistant you want a hosted server app instead.