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Product / UX / UI & API

HuggingChat / chat-ui

Hugging Face

Open-source chat UI that powers HuggingChat (huggingface.co/chat), giving free public access to open-weights models like Llama, Mistral, Command R+ and others. Differentiator is being the reference SvelteKit chat UI shipped and maintained by Hugging Face itself, with first-class support for TGI/transformers endpoints; ~11k GitHub stars but powers a high-traffic free consumer endpoint.

chat-ui v0.10.0 (May 11, 2026), Apache-2.0, powers HuggingChat at hf.co/chat. Original HuggingChat was sunset July 1, 2025, then relaunched as 'HuggingChat Omni' (Omni Router + 115-123 open models, 15 inference providers, MCP). Confirmed live June 2026.

Openness

5 high confidence
5.0
license
Apache-2.0(OSI)
source
public
core-gated
ungated

Fully OSI (Apache-2.0); the public codebase is exactly what powers the hosted HuggingChat, self-hostable end to end.

Adoption

3 medium confidence
3.0

Hosted HuggingChat served 1M+ users and 100k+ assistants over its lifetime (HF announcement) before the July 2025 sunset; relaunched as HuggingChat Omni and live again on hf.co/chat. chat-ui repo itself is a modest 10.7k stars (self-host base is niche). Placed at 3 on the disclosed lifetime user reach of the hosted product; the discontinuity + relaunch lowers confidence.

Capability

3 medium confidence
3.0

Good model breadth + smart routing + MCP, but the rebuilt v0.10 deliberately stripped RAG/provider integrations present in the legacy branch, so the self-host feature surface is leaner than Open WebUI/LibreChat. Mid-tier for the category.

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