Ollama vs Open WebUI

OllamaOpen WebUI
Role Model runtime and local API server Web chat UI and frontend
Interface CLI-first (ollama run, ollama pull) Browser-based chat, settings, and admin
API OpenAI-compatible server on port 11434 Connects to Ollama, LM Studio, or other backends
Best for Scripts, Docker, headless servers Local chat UI, multi-user setups, RAG workflows

Verdict

Ollama runs the models; Open WebUI is the interface. Use both together for a full local chat experience.