NextChat

NextChat is an AI chat interface for people who want to use self-deployed LLMs and cloud models in one application. It connects to LocalAI and RWKV-Runner, and supports OpenAI, Claude, Google Gemini and DeepSeek.

• Reusable prompts: Create, share and refine prompt templates for recurring chat tasks.
• Long conversations: Responses stream as they arrive, and automatic history compression helps keep longer chats within the model's context.
• Technical formatting: Markdown rendering includes LaTeX equations, Mermaid diagrams and syntax highlighting for code.
• Browser access: The responsive interface includes dark mode, multiple languages and PWA support.

The project is open source under the MIT license. You can self-host it with Docker or deploy it on Vercel; desktop clients run on macOS, Windows and Linux. Chat data is stored locally in the browser, while cloud model requests use external API endpoints.

NextChat also offers a separate hosted chat service that requires sign-up and provides model access without your own API key.