RunLocalAI
gui
Open source
free
4.6/5

Open WebUI

Self-hosted ChatGPT-style web frontend. Pairs with Ollama or any OpenAI-compatible backend. Multi-user, RAG built in, fast.

By Fredoline Eruo·Last verified May 6, 2026·80,000 GitHub stars

Overview

Self-hosted ChatGPT-style web frontend. Pairs with Ollama or any OpenAI-compatible backend. Multi-user, RAG built in, fast.

Pros

  • ChatGPT-style UX
  • Multi-user with auth
  • RAG and document chat
  • Active development

Cons

  • Needs a backend (Ollama / vLLM)

Compatibility

Operating systems
macOS
Linux
Windows
Docker
GPU backends
any (proxies to a runner)
LicenseOpen source · free

Get Open WebUI

GitHub
https://github.com/open-webui/open-webui

Frequently asked

Is Open WebUI free?

Yes — Open WebUI is free to download and use and open-source under a permissive license.

What operating systems does Open WebUI support?

Open WebUI supports macOS, Linux, Windows, Docker.

Which GPUs work with Open WebUI?

Open WebUI supports any (proxies to a runner). CPU-only inference is also possible but slow.

Reviewed by RunLocalAI Editorial. See our editorial policy for how we evaluate tools.