Open WebUI is a powerful, self-hosted open-source web interface for running and managing local AI models through Ollama and OpenAI-compatible APIs, providing a polished ChatGPT-like experience entirely on your own hardware. It supports multiple model management, conversation history, RAG document uploads, voice input, web browsing, image generation, and extensive customization — all with zero data leaving your infrastructure. Privacy-conscious developers, researchers, and enterprises use Open WebUI to deploy a feature-rich AI assistant interface for their teams while maintaining complete data sovereignty and avoiding per-query API costs.