Jan
Open-source, offline ChatGPT replacement for the desktop. Download open-weight models like Qwen3, Llama 4 Scout or gpt-oss and run them entirely on your own machine.
About Jan
Jan is an open-source desktop app that gives you a clean chat interface over models running locally on your own hardware — no account, no cloud, no telemetry. You pick a model from its catalogue, it downloads and runs it, and conversations stay on the machine. In 2026 the practical choices are Qwen3 in its 8B to 30B sizes, Llama 4 Scout 17B for general work, gpt-oss 20B on 16GB machines and Phi-4 14B at 8GB VRAM. Jan sits alongside Ollama, LM Studio, Open WebUI, AnythingLLM and Llamafile as one of the standard ways to run local LLMs.
Pros & Cons
Pros
- Free and fully open source
- Works completely offline with no account
- Clean interface aimed at non-technical users
- Can also route to cloud models with your own keys
Cons
- Model quality is limited by your hardware
- Smaller ecosystem than Ollama or LM Studio
- Fewer advanced serving options
- Large models remain out of reach on most laptops
Use Cases
Tags
Company Info
- Company
- Jan AI
- Founded
- 2023~
- HQ
- San Francisco, USA~
- Pricing
- free
- Last verified
- 2026-08-29
~ Approximate. Verify at the official website.
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Is Jan free?▾
Yes, Jan is completely free to use.
What is Jan used for?▾
Open-source, offline ChatGPT replacement for the desktop. Download open-weight models like Qwen3, Llama 4 Scout or gpt-oss and run them entirely on your own machine. Key use cases include: Private offline chat assistant, Running AI on air-gapped machines, Trying open-weight models with no setup.
What are the pros and cons of Jan?▾
Pros: Free and fully open source; Works completely offline with no account; Clean interface aimed at non-technical users. Cons: Model quality is limited by your hardware; Smaller ecosystem than Ollama or LM Studio.
Who makes Jan?▾
Jan is developed by Jan AI, founded in 2023.
What are the best alternatives to Jan?▾
Top alternatives to Jan include DeepSeek, ChatGPT, Claude. You can compare them all on AIFans.
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