NextChat

NextChat is a lightweight, self-hosted web interface for chatting with large language models, packaged as a single Docker container. It works as a unified frontend for OpenAI, Anthropic Claude, Google Gemini, DeepSeek, and any OpenAI-compatible local backend (Ollama, LocalAI, vLLM). Features include cross-device sync, prompt templates, Markdown and LaTeX rendering, image generation, and PWA support for installation as a desktop or mobile app. With 87k+ stars on GitHub, it is one of the most popular open-source AI chat UIs — fast to deploy, minimal configuration, and no telemetry — your API keys and conversations stay on your own server.