ChatGPTNextWeb/NextChat

A self-hosted chat interface that lets you wrap any major LLM backend, including OpenAI, Claude, Gemini, and others, in a clean, responsive front-end you fully control. You deploy it on your own infrastructure, point it at your API keys, and your team gets a polished chat experience without routing data through third-party consumer apps. The cross-platform reach is genuine, covering web, iOS, Android, macOS, Linux, and Windows, which removes the usual friction of getting non-technical teammates onto a custom AI setup. The project has accumulated a substantial community, which means active maintenance, a wide range of documented configuration options, and plenty of prior troubleshooting in the issue tracker. Setup is straightforward for anyone comfortable with Docker or a basic Node deployment. The honest reservation is that it is a UI layer, not a platform. You still need to manage your own API keys, costs, and access controls separately, which adds overhead for teams expecting a fully managed solution. -> Best for: technical founders or IT leads who want a professional internal chat tool without handing employee prompts to a third-party service.