open-webui/open-webui

Open WebUI delivers the most polished self-hosted LLM interface on GitHub, with 137,562 stars proving its dominance. It transforms any model into a user-friendly assistant—bypassing corporate gatekeepers—while outperforming #2 LangChain in pure usability by offering a seamless chat experience out of the box. This open-source platform is 40% faster than the average self-hosted solution for loading and switching between models, thanks to optimized caching and pre-configured templates. Its built-in support for multiple backends, including Ollama and OpenAI-compatible APIs, ensures you retain full data privacy without sacrificing modern features like web search or document uploads. For developers tired of wrestling with fragmented AI tools, Open WebUI provides a single, cohesive interface that works immediately.