Jan
By Menlo Research
Open-source ChatGPT alternative that runs entirely offline. Built on llama.cpp with a clean desktop UI and an OpenAI-compatible API.
Best for
- fully offline AI use
- private chat without cloud round-trips
- open-source local AI alternative
Other Local & on-device AI
Ollama
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llama.cpp
C/C++ inference engine for LLaMA-family models. The library that quietly powers most local AI apps — fast, low-level, runs on almost anything.
MLX
Apple's array framework for Apple Silicon. Designed to run ML workloads natively on M-series Macs with unified memory between CPU and GPU.
GPT4All
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AnythingLLM
All-in-one desktop/self-hosted app for document chat (RAG) and agents over local or cloud models.
Msty
Private desktop AI workspace that runs local and cloud models side by side with personas and automations, no setup.