Open WebUI is the most widely deployed open-source AI interface, providing a ChatGPT-like web experience that runs entirely on your infrastructure. Created by Timothy Jaeryang Baek, it evolved from an Ollama frontend into a full backend-agnostic AI platform supporting any OpenAI-compatible API, direct Ollama connections, and custom pipeline integrations.
Installation takes a single Docker command with no account required. The platform supports GPU acceleration via CUDA, Kubernetes deployment with official Helm charts, and slim image variants for environments with limited storage. The chat interface allows switching between local and cloud backends simultaneously, enabling teams to use different models for different tasks through a unified interface.
Built-in RAG handles document upload, chunking, embedding, and retrieval without external vector database infrastructure. The multi-user architecture includes role-based access control with user, power user, and admin roles, plus SSO integration and audit logging for enterprise deployments. A Python function calling workspace enables custom tool integrations written directly in the browser.
Additional features include a model builder for custom agents, a masked arena for blind A/B model testing, note-taking with Markdown and AI enhancement, voice and video call support with multiple STT/TTS providers, and a community ecosystem at openwebui.com for sharing prompts, tools, and configurations. The platform handles everything from individual developer workstations to team-wide AI deployments.
