Local LLM stacks · Head to head
Jan vs LM Studio — the open-source app or the model workbench
Updated 2026-09-29 · markdown mirror
Verdict
Jan if you want a free, open-source desktop app that stays out of the way, with the option to plug in cloud models when you choose. LM Studio if you want the deeper model workbench and its bundled Bionic agent for work and code, and will confirm the workplace licence term first. Both run models locally and download from Hugging Face, so the decision is licence and polish, not capability.
| Jan | LM Studio | |
|---|---|---|
| Best for | a simple open-source all-in-one desktop app | a desktop GUI with Hugging Face browsing and local API serving |
| Free tier | Free and open source Documented at the source Checked 2026-09-20 jan.ai | Free for personal use Documented at the source Checked 2026-09-20 lmstudio.ai |
| Paid from | $0/mo Documented at the source Checked 2026-09-20 jan.ai Open source, free | $0/mo Documented at the source Checked 2026-09-20 lmstudio.ai Free for personal use, check licence for workplace use |
| Graphical interface | Yes, desktop app for Mac, Windows, and Linux Documented at the source Checked 2026-09-24 jan.ai /download | Yes, polished desktop chat interface Documented at the source Checked 2026-09-20 lmstudio.ai |
| OpenAI-compatible API | Yes, local server Unconfirmed — in the claim queue Checked 2026-09-20 jan.ai | Yes, local server mode Unconfirmed — in the claim queue Checked 2026-09-20 lmstudio.ai |
| Model management | Yes, downloads from Hugging Face Documented at the source Checked 2026-09-20 jan.ai | Yes, search and download from Hugging Face Documented at the source Checked 2026-09-20 lmstudio.ai |
| AI crawler policy | open Tested by us Checked 2026-09-27 /local-llm/benchmarks/local-llm-ai-crawler-access/ Our benchmark (n=4 tools × 3 runs) — methodology on the benchmark page | open Tested by us Checked 2026-09-27 /local-llm/benchmarks/local-llm-ai-crawler-access/ Our benchmark (n=4 tools × 3 runs) — methodology on the benchmark page |
● tested by us · ● documented at the source · ● unconfirmed, queued in /confirm.txt — hover or tap a dot for the source and date
The actual difference
Licence and posture, not features. Jan is an open-source desktop app that presents itself as a simple chat client for local models, with cloud providers available if you choose to connect them [1]. LM Studio is a freeware workbench built around model craft: deep Hugging Face search, quantisation controls, a local server, and now Bionic, an agent for work and code that runs on its MLX and llama.cpp runtime [2]. Both keep inference on your machine.
Where each one wins
Jan wins the first ten minutes. Install, pick a model, chat, and the whole thing is inspectable because the source is open. It reports more than six million downloads [1]. LM Studio wins the second hour, when you start comparing quantisations, sliders, and frontier open models, or when you want an agent that edits documents and drives tasks locally [2]. Pick the timeframe you actually live in.
Licensing, the footnote that matters
Jan is open source and free everywhere [1]. LM Studio is free for personal use and asks about workplace use in its licence terms, which we carry as an unconfirmed claim with a check date rather than guessing. Relevant if you are standardising a team, irrelevant on a personal machine.
Our verdict in one line each
Jan when the app must be yours to inspect and keep. LM Studio when the workbench, and now its agent, are the point.
FAQ
Is Jan or LM Studio free?
Both are free to download and use. Jan is open source, with more than six million downloads reported on its site [1]. LM Studio is free for personal use, with a workplace licence term to confirm on its site (we carry that as an unconfirmed claim with the check date). Neither charges for the core app at our last check.
Which has more models, Jan or LM Studio?
Both download models from Hugging Face, so catalogue depth is effectively shared [1][2]. The difference is presentation. LM Studio gives you granular search and quantisation controls, Jan keeps the library simple. A model that runs in one very likely runs in the other.
Do Jan and LM Studio expose a local API?
Yes, both offer a local server that speaks the OpenAI-compatible API, which is how you point other tools at a model on your own machine. We checked the vendors' sites rather than a lab, so verify against current docs before you build on either.
Which is better for privacy?
Both keep inference on your machine, so prompts stay local either way. LM Studio states that its cloud services are Zero Data Retention [2]. Jan can also connect to cloud providers such as OpenAI, Anthropic, or Google if you add them, and those chats leave your device [1].
Which should a beginner pick?
Jan, if beginner means wanting an app that behaves like a chat client. It is the simplest of the desktop options and fully open source [1]. LM Studio rewards a little more tinkering with deeper controls and the Bionic agent for work and code [2].
Sources
- Jan — Meet Jan — Jan homepage, free and open source, 6.8M+ downloads, cloud model plug-ins, memory marked coming soon (checked 2026-09-29)
- LM Studio Bionic — LM Studio homepage, Bionic agent for work and code, MLX and llama.cpp runtime, Zero Data Retention cloud services (checked 2026-09-29)
Numbered markers in the text refer to this list. External sources are cited, not affiliated.