What it does
Core capabilities at a glance
- ChatGPT-like UI with multi-chat tabs
- Native Ollama integration
- Works with any OpenAI-compatible endpoint
- Multi-user with RBAC + SSO
- RAG with built-in document upload
- Code interpreter
- Web search integration
- Function calling and tool use
- Voice input + TTS output
Deep dive
The full breakdown - performance, comparisons, and setup
Open WebUI
Short answer: Open WebUI is the ChatGPT-style web frontend that 90% of local-AI deployments end up using. Pair it with Ollama, point a browser at it, give your team accounts - done. No more telling colleagues "run this command in the terminal."
What it is
Open WebUI is a self-hostable, multi-user web interface for LLMs. It speaks the OpenAI API shape, so it works with Ollama, LM Studio, vLLM, and any other endpoint that pretends to be OpenAI. It bundles RAG, web search, function calling, voice, and full team management into one Docker container.
It was previously called "Ollama WebUI" before becoming endpoint-agnostic in early 2024.
Why this is the default frontend
- Looks indistinguishable from ChatGPT - your non-technical teammates onboard in 30 seconds
- One Docker container -
docker run -d -p 3000:8080 ghcr.io/open-webui/open-webui:mainand you're live - Multi-user with proper RBAC - admin/user roles, group-based model access, audit logs
- RAG that actually works - drag-and-drop documents per chat, persistent knowledge bases
- Active development - releases weekly in 2026, responsive maintainers
Real-world deployments
Common Open WebUI + Ollama setups (single GPU):
| Hardware | Model | Concurrent users | Notes |
|---|---|---|---|
| RTX 4090 | Qwen3 30B Q4_K_M | 3–5 | Tight, OK for small team |
| RTX 5090 | Qwen3 30B Q5_K_M | 6–10 | Sweet spot for SMB |
| Dual RTX 3090 | Llama 3.3 70B Q4 | 4–6 | Quality > speed |
| Mac Studio M4 Ultra | Mixed (3 models loaded) | 4–6 | Best multi-model flexibility |
How it compares
| Open WebUI | LM Studio | AnythingLLM | Jan | |
|---|---|---|---|---|
| Multi-user | ✓ | ✗ | ✓ | ✗ |
| Web UI | ✓ | desktop only | ✓ | desktop only |
| RAG | ✓ | basic | ✓✓ (workspaces) | basic |
| Docker | ✓ | ✗ | ✓ | ✗ |
| Best for | teams, self-hosted SaaS | solo desktop power-user | document-heavy RAG | local desktop chat |
See Ollama vs Open WebUI (they're complementary, not competitors).
Frequently asked
Does Open WebUI work without Ollama?
Yes. Point it at any OpenAI-compatible endpoint - vLLM, LM Studio, llama.cpp server, even OpenAI itself.
Can I use it for multiple teams with separate models?
Yes. RBAC + group-based model access lets you give Marketing access to Llama 3.3 while Engineering uses Qwen3-Coder.
How much RAM/CPU does Open WebUI itself need?
The UI container is tiny - ~500MB RAM, negligible CPU. All the load is on whatever LLM backend you point it at.
Get started
docker run -d \
--name open-webui \
-p 3000:8080 \
-v open-webui:/app/backend/data \
--add-host=host.docker.internal:host-gateway \
ghcr.io/open-webui/open-webui:mainThen visit http://localhost:3000, create the admin account, and it auto-discovers your local Ollama at http://host.docker.internal:11434.
Frequently asked
Quick answers to common questions
What is Open WebUI?
Open WebUI is a chat-ui tool for local AI workloads. The ChatGPT-style web interface for Ollama and any OpenAI-compatible local LLM.
Is Open WebUI free and open source?
Yes, Open WebUI has 140,488 GitHub stars and is licensed under BSD-3-Clause. You can self-host it for free on docker, linux, macos, windows.
What platforms does Open WebUI support?
Open WebUI runs on docker, linux, macos, windows.
What hardware do I need for Open WebUI?
The hardware requirements depend on which models you run. Check our hardware directory for compatible GPUs and systems. Open WebUI has 140,488 GitHub stars and an active community.
Does Open WebUI support GPU acceleration?
Open WebUI supports GPU acceleration via CUDA, Metal, or Vulkan depending on your platform. For the best performance, pair it with an NVIDIA RTX 4090 or 5090.
What are the best alternatives to Open WebUI?
Popular alternatives include other chat-ui tools in our directory. Browse our full collection at /tool for comparisons, community reviews, and benchmark data to find the right fit for your workflow.
How much does Open WebUI cost?
Open WebUI is free-open-source. It is completely free and open source to self-host.
Pairs well with
Complementary tools, models, and hardware
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