A lightweight, privacy-first web and desktop AI assistant that supports multiple LLMs and can be self-hosted.
NextChat is an open-source, lightweight web and desktop application that serves as a unified interface for interacting with multiple AI models like GPT-4, Claude, and Gemini. It solves the problem of fragmented AI tooling by providing a single, private, and customizable client that works across all major platforms.
Developers, teams, and individuals who need a private, self-hostable AI chat interface that supports multiple LLM providers and offers advanced features like prompt templating and local data storage.
Developers choose NextChat for its exceptional privacy controls, one-click self-hosting, broad model compatibility, and sleek multi-platform clients—all packaged in a fast, open-source solution that avoids vendor lock-in.
✨ Light and Fast AI Assistant. Support: Web | iOS | MacOS | Android | Linux | Windows
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All chat data is stored locally in the browser by default, ensuring user data never leaves their device unless explicitly shared, as highlighted in the README's 'Privacy-First' philosophy.
Supports OpenAI GPT, Claude, Gemini, DeepSeek, and self-hosted models via LocalAI or RWKV-Runner, allowing seamless switching between providers, with extensive environment variable configurations for each.
Can be deployed on Vercel with one-click in under a minute and offers lightweight desktop clients (~5MB) for Windows, macOS, and Linux, making it accessible across platforms.
Includes customizable prompt templates (masks) for creating, sharing, and debugging chat tools, powered by community-driven libraries like awesome-chatgpt-prompts, enhancing workflow efficiency.
Managing numerous environment variables for different API keys and endpoints (e.g., OPENAI_API_KEY, ANTHROPIC_API_KEY, BASE_URL) can be cumbersome and error-prone, especially for non-technical users.
The roadmap lists 'local knowledge base' as a future feature, so users needing Retrieval-Augmented Generation (RAG) capabilities must wait or handle external integrations, limiting out-of-the-box functionality.
Lacks native multi-user features like role-based access control or shared workspaces, relying on basic password protection via the CODE environment variable, which may not scale for team environments.
ChatGPT Next Web is an open-source alternative to the following products:
ChatGPT Web Interface is the official browser-based application where users can interact with OpenAI's ChatGPT conversational AI through a graphical user interface.
Claude Web App is the web-based interface for interacting with Anthropic's Claude AI assistant through a browser, providing chat-based AI capabilities.