Jan
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 fits
A fit for individuals or teams who want a local AI assistant with a hard guarantee that conversations never leave the machine.
Where it does not fit
Not built for multi-user deployment: for a shared internal assistant you want a hosted server app instead.
Alternatives to Jan
The closest options on the map, and where each fits instead.
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LM Studio Local desktop runtime
A fit when an individual wants to discover and run local models through a friendly desktop GUI.
Unlike Jan ProprietaryMaturity: established
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Msty Local desktop app
A good pick when a non-technical user wants local models running with the least possible setup.
Unlike Jan Proprietary
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Chatbox Local desktop app
Best for an individual who wants a single, simple desktop client across several model providers.
Unlike Jan Maturity: established
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Hollama Minimal chat front-end
A fit when you want the lightest possible self-hosted chat window over a model endpoint, with nothing to operate.
Unlike Jan Maturity: emerging
Pairs with
Commonly used alongside it.
