Open WebUI 2026: Run Your Own Private ChatGPT in 15 Minutes (147k Stars)

You want the ChatGPT experience with your own models and your own data - no subscriptions, no uploads. Open WebUI gives you that in one Docker command.

## Open WebUI: The Self-Hosted ChatGPT Interface Open WebUI (147,533 GitHub stars, permissively licensed) is the most popular self-hosted AI chat interface in existence. It connects to Ollama, OpenAI-compatible APIs, and local models, and provides the full ChatGPT-style experience - chat UI, file uploads, image support, model switching, multi-user accounts, and even a knowledge base (RAG) feature. One docker compose command and your team has a private AI workspace. ## The 15-Minute Setup ```bash docker run -d -p 3000:8080 --add-host=host.docker.internal:host-gateway \n -v open-webui:/app/backend/data --name open-webui ghcr.io/open-webui/open-webui:main ``` Open http://localhost:3000, create the admin account, and connect your models: point it at Ollama (it auto-detects local models) or add an OpenAI-compatible API key. That is the whole setup - no database to configure, no reverse proxy required for local use. ## Why Teams and Power Users Love It - **Privacy.** Conversations stay on your hardware. For businesses handling sensitive data, this is the difference between usable and unusable. - **Multi-user.** Real accounts, admin roles, and per-user settings - free ChatGPT for your whole team on one box. - **RAG built in.** Upload documents into collections and chat over them; each collection is a mini knowledge base. - **Model routing.** Define which models users can see and set a default; power users can compare models side by side. - **Voice and images.** Voice input and multimodal model support are included. ## Hardware Reality The interface itself runs on any small VPS. The models are the cost: an 8B model runs on 8-16GB RAM (CPU works, GPU is better); 70B-class models want 48GB+ or quantized CPU inference with patience. Start with a 7-14B model on one GPU and scale as usage grows. ## FAQ **Is Open WebUI free?** Yes - open source; you pay only for the hardware it runs on. **Can it use cloud APIs too?** Yes - it connects to OpenAI, Anthropic, and any OpenAI-compatible endpoint alongside local models. **Is it secure for a company?** It has auth and admin controls; for serious deployments put it behind a reverse proxy with HTTPS and SSO. **Open WebUI vs LibreChat vs LobeChat?** All are solid self-hosted chat UIs; Open WebUI has the largest community and best Ollama integration.