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RUNLOCALAI · v38
← Home·/apps·Chat UI

Jan

Fully offline

Privacy-first desktop chat with a curated model catalog. Llama / Mistral / Qwen one click from the app.

Editorial verdict: “Best one-binary desktop chat. Curated catalog removes 'which model?' decision paralysis.”

Chat UI
Free
AGPL-3.0
★ 4.5 / 5
GitHub ★ 28,000
↗ Homepage↗ GitHub↗ Docs

Compatibility at a glance

Which runtime + OS combos this app works against. Source of truth for "will it run on my setup?"

§ Runtimes supported
llama-cppollamaopenai-compat
§ OS / platform
macoslinuxwindows
§ Hardware + model hint
Minimum VRAM
4 GB
Recommended starter model
Llama 3.1 8B Q4_K_M
→ Build the rest of the stack with /stack-builder→ Pick a GPU for this app

What it is

Jan is the right pick if you want a local chat app that works without touching a terminal or Docker. It ships as a single desktop binary for macOS, Linux, or Windows, and its curated catalog lets you download Llama 3.1 8B or Mistral with one click—no deciding which variant to grab. The app runs fully offline using its embedded llama.cpp runtime, but can also point at external Ollama or OpenAI-compatible endpoints if you need that flexibility. The tradeoff: its RAG and file-upload features are less mature than Open WebUI’s, so don’t expect polished document workflows yet. For a no-fuss, privacy-first chat UI that gets you from install to first message in under three minutes, Jan delivers.

✓ Strengths

  • +Single-binary install — no terminal required
  • +Curated model catalog with one-click download
  • +Built-in OpenAI-compatible API server

△ Caveats

  • −Smaller ecosystem than Open WebUI
  • −RAG / file-upload features are less mature

About the Chat UI category

Web or desktop chat client that connects to your local runtime.

§ Other chat ui apps
AnythingLLM

Best fast-RAG app. Workspace model is the right abstraction for doc-corpora chat.

LibreChat

Best if you mix local + cloud models in the same workflow. Strong team features.

Open WebUI

Best default chat UI for solo Ollama users. Pick this first; switch only if you outgrow it.

Odysseus

The most visible on-ramp to local AI yet — its hardware-aware Cookbook makes it a genuine beginner pick, but it's young and 'janky' by its own README; treat Agent mode's shell access with caution.

Where to go from here

Stack Builder →

Pre-filled with this app's recommended use case + budget tier. Get the full rig + runtime + model picks.

Back to /apps →

The full directory — filter by category, runtime, OS, privacy posture, or VRAM.

Runtimes (/tools) →

What this app talks to: Ollama, vLLM, llama.cpp, MLX, LM Studio. The upstream layer.

Community benchmarks →

Did this app work for you on a specific rig? Submit the benchmark — it powers the model + hardware pages.