AI Potluck
Product / UX / UI & API

Jan

Jan

Cross-platform desktop app (Windows/macOS/Linux) for running open source models 100% offline, with a clean ChatGPT-style UI, optional cloud provider integrations, and a local OpenAI-compatible API server on localhost:1337. Picked over alternatives for its polished native desktop experience and offline-first stance; 5.3M+ downloads and ~43k GitHub stars by May 2026.

Jan v0.8.2 (released 1 Jun 2026). Open-source local-first ChatGPT alternative (desktop chat UI) by Menlo Research / janhq; runs local GGUF models plus pluggable cloud providers, ships an OpenAI-compatible local API server. Verified live on GitHub + jan.ai June 2026.

Openness

5 high confidence
5.0
license
Apache-2.0(OSI)
source
public(github.com/janhq/jan)
self-host
primary(desktop app, 100% offline-capable)
core-gated
ungated

Fully OSI-licensed (Apache-2.0), full source public, no proprietary feature-gated core, a true open chat UI.

Adoption

4 medium confidence
4.0

Vendor site reports 5.7M+ cumulative downloads of the desktop app; 42.9k GitHub stars corroborates but is not the basis. Cumulative-download volume places it in the 1-10M band, though these are lifetime installs not active users.

Capability

3 medium confidence
3.0

Solid open desktop chat UI with broad model selection and a local OpenAI-compatible server, but single-user and lighter on RAG/multimodal than the frontier consumer apps in this category. Mid-tier on the chat-UI feature matrix.

  • https://jan.ai/ recorded 2026-06-04

    open + cloud model providers, OpenAI-compatible API, local-first

  • https://github.com/janhq/jan recorded 2026-06-04

    feature set: local LLMs, cloud integration, custom assistants, OpenAI-compatible API

Unchanged since 2026-07-30 (last edited, not re-checked)