HuggingChat (chat-ui)

HuggingChat (chat-ui) is a app in the osFoundry community catalog. HuggingFace's open-source chat UI — the same code that powers huggingface.co/chat. Multi-conversation history, model picker, web search tool, image gen tool (via Stable Diffusion endpoint), and configurable system prompts. SQLite bundled (chat-ui-db variant), so no external MongoDB needed. Works with any OpenAI / TGI / Anthropic / Cohere / Mistral / HuggingFace Inference endpoint. The cleanest open-source chat UI Hugging Face ships.

Details

Workspace: osfoundry
Category: AI
Pricing: Free
Access: Community

Features

Same UI as huggingface.co/chat — multi-conversation history, model picker, system prompts
SQLite bundled (chat-ui-db variant) — no external MongoDB to provision
Works with HuggingFace TGI / OpenAI / Anthropic / Cohere / Google Vertex / AWS Bedrock
Web search tool (via SerpAPI / Serper / You.com keys) for current-info queries
Image generation tool — plug in any Stable Diffusion endpoint
OIDC multi-user mode — connect Auth0 / Keycloak / GitHub / Google for per-user accounts

Documentation

# HuggingChat (chat-ui)

## What's in the image

This is the `chat-ui-db` variant — same UI as huggingface.co/chat, but with SQLite bundled instead of requiring external MongoDB. Perfect for self-hosting without infrastructure.

## Default models

Out of the box, the UI ships with a few default HuggingFace Inference endpoints (free tier, rate-limited). Set `HF_TOKEN` to use your account quota.

## Custom models (MODELS env)

Set `MODELS` to a JSON array like:

```json
[{
  "name": "meta-llama/Llama-3.1-8B-Instruct",
  "endpoints": [{
    "type": "tgi",
    "url": "https://my-tgi.example.com"
  }]
}]
```

Supported endpoint types: `tgi` (HuggingFace Text Generation Inference), `openai`, `anthropic`, `cohere`, `vertex` (Google), `aws`. See [chat-ui docs](https://github.com/huggingface/chat-ui#configuration).

## Web search

Set `SERPAPI_KEY` (or `SERPER_API_KEY` / `YDC_API_KEY` for You.com) and the UI grows a 'Search' tool — model can browse the web for current info.

## Multi-user

With `OPENID_CONFIG` (point at a OIDC provider) you get accounts + per-user history. Without it, history is anonymous-per-browser-cookie.

## Storage

SQLite at `/data/db.sqlite`. Conversations + user data persist across container restarts. 5 GB volume is enough for years of chat.

How to use HuggingChat (chat-ui) in osFoundry

Install HuggingChat (chat-ui) into your workspace in one click, then fork it in osStudio to customise the prompts, tools, or configuration for your stack. Anyone in your workspace can pick up where you left off.

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