AI Potluck
Product / UX / UI & API

Jan

Jan

Cross-platform desktop app for running open-weights models entirely offline, with a chat interface, optional cloud provider integrations, and a local OpenAI-compatible API server on localhost:1337. Built by Menlo Research, it runs local GGUF models and ships custom assistants alongside pluggable remote providers.

Verified 2026-08-13 via the janhq/jan repository and the jan.ai product site.

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. The LICENSE applies Apache-2.0 by reference with one added sentence asking that attribution appear in user-facing materials - a request, not a condition, which is why GitHub reports the repository as NOASSERTION rather than Apache-2.0.

Adoption

4 medium confidence
4.0

The vendor homepage reports 6.1M cumulative downloads of the desktop app, which places it in the 1M-10M band; 43.8K GitHub stars corroborate but are not the basis. These are lifetime installs rather than active users, which is why confidence is medium.

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 2026-08-13

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

  • https://github.com/janhq/jan recorded 2026-08-13

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

Verified 2026-08-13