Open WebUI
Chat & assistant UIsA self-hosted, feature-rich chat interface for local and remote models — the most common front door for a private assistant.
Open WebUI is a polished chat interface you run yourself. It speaks to Ollama and any OpenAI-compatible endpoint, so the same UI fronts a local model or a hosted one without changing anything users see.
It has grown well past a chat box: per-user accounts and roles, document upload with built-in retrieval, model switching, and a workspace for prompts and tools. For most teams it is the fastest way to put a controlled assistant in front of staff without writing a front-end.
Where it's ideally used
The default choice when a team wants a private ChatGPT-style assistant inside its own perimeter, with accounts and document chat, and no front-end to build.
Where it doesn't fit
Not the right base when the assistant needs to be deeply embedded in your own product UI — at that point you want a component library, not a standalone app.