Head-to-head comparison
JanvsLM Studio
Jan and LM Studio are the two desktop apps most people use to run open-weight models locally with a chat interface. LM Studio is the more polished, closed-source option with excellent model discovery and hardware guidance. Jan is fully open source, mixes local and cloud models in one app, and exposes a local API server just as easily.
At a glance
| Jan | LM Studio | |
|---|---|---|
| Category | Chat | Chat |
| Function | Local AI app | Local AI app |
| Pricing | Free | Free |
| Starting price | Free (open source) | Free for personal use |
| Released | August 2023 | May 2023 |
Jan
Pros
- Fully open source, unlike LM Studio
- Simple enough for non-developers
- Mixes local and cloud models in one app
Cons
- Fewer hardware hints than LM Studio when choosing models
- Smaller feature set than Open WebUI
- Same hardware limits as any local runner
LM Studio
Pros
- No terminal needed — the friendliest way to try local models
- Tells you which models will actually fit your machine before you download
- Local document chat keeps sensitive files off the cloud
Cons
- Closed source, unlike Ollama
- Commercial use requires contacting the company
- Same hardware limits as any local runner — small models on small machines
Which one should you pick?
Pick Jan if
You want open-source software you can inspect, plan to mix local models with cloud providers in one interface, or prefer a lighter app.
See Jan details →Pick LM Studio if
You want the smoothest onboarding, want the app to tell you which models will fit your GPU and RAM, or need its more mature server features.
See LM Studio details →Bottom line
LM Studio for the easiest first local model. Jan if open source matters or you want one chat window for local and cloud models. Both are free, so try both in an afternoon.