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Open WebUI: the best Open Source alternative to ChatGPT Plus in 2026

Open WebUI is an extensible, self-hostable chat interface for local LLMs (via Ollama) or remote OpenAI-API-compatible models, with support for RAG, multiple users and plugins.

License MIT 150.3k stars liveUpdated hoyWebsite GitHub Repository

Technical profile

License: MIT
Category: Artificial Intelligence
Replaces: ChatGPT Plus
Tech stack: PythonSvelteSQLite

Preview

Public image provided by Open WebUI on its own website.

Key features

Compatible with Ollama and any OpenAI-style API
RAG with your own documents
User and role management
Marketplace of community prompts and functions

Open WebUI vs. ChatGPT Plus

Pros

Runs 100% local models, no data sent to third parties

Things to consider

Quality depends on the model you choose to run (GPU recommended)

Quick Docker installation guide

Copy this docker-compose.yml, adjust the example passwords and run docker compose up -d on your server. See the full step-by-step guide →

docker-compose.yml

version: "3.9"
services:
  open-webui:
    image: ghcr.io/open-webui/open-webui:main
    restart: unless-stopped
    ports:
      - "3000:8080"
    environment:
      - OLLAMA_BASE_URL=http://ollama:11434
    volumes:
      - open_webui_data:/app/backend/data
    depends_on:
      - ollama
  ollama:
    image: ollama/ollama:latest
    restart: unless-stopped
    volumes:
      - ollama_data:/root/.ollama
volumes:
  open_webui_data:
  ollama_data: