ChatGPT Next Web

Free

Alternative ChatGPT web UI.

FreeFree tier

Inputs: textOutputs: text, code

Type

Open Source

Visit Website GitHub (40 stars)

About ChatGPT Next Web

NextChat (formerly ChatGPT Next Web) is an open-source, cross-platform AI assistant client that provides a lightweight, fast, and privacy-focused user interface for interacting with large language models. It supports popular AI models including Claude, DeepSeek, GPT-4, and Gemini Pro. The app can be deployed for free in under one minute via Vercel or downloaded as a compact client (~5MB) for Linux, Windows, macOS, iOS, and Android. It is fully compatible with self-hosted LLMs via RWKV-Runner or LocalAI, stores all data locally in the browser, and features responsive design, dark mode, PWA support, streaming responses, markdown rendering (LaTeX, mermaid, code highlight), prompt template masks, automatic chat history compression, and internationalization (English, Simplified Chinese, Traditional Chinese).

Key Features

One-click free deployment on Vercel in under 1 minute

Compact native client (~5MB) for Linux, Windows, and macOS

Fully compatible with self-deployed LLMs via RWKV-Runner or LocalAI

Privacy-first: all data stored locally in the browser

Markdown support: LaTeX, mermaid, code highlight, and more

Responsive design with dark mode and PWA support

Fast first screen loading (~100kb) and streaming response support

Create, share, and debug chat tools with prompt template masks

Integrated awesome prompt libraries (English and Chinese)

Automatic chat history compression for long conversations and token savings

Pros & Cons

Pros

Free and open-source with no usage limitations
Runs on virtually all platforms (web, desktop, mobile)
Quick deployment via Vercel with minimal setup
Strong privacy by storing data locally in the browser
Lightweight client (~5MB) and fast loading speed (~100kb)
Supports streaming responses for real-time interaction
Extensive markdown rendering including LaTeX and mermaid diagrams
Compatible with multiple AI backends (OpenAI, Claude, DeepSeek, Gemini, local LLMs)

Cons

Requires external API keys or a self-hosted LLM backend to function
Not a stand-alone AI model; depends on third-party services or local infrastructure
Web version may need a Vercel account or similar hosting for online access
Advanced features (e.g., enterprise deployment) may require paid support or customization

Best For

Cross-platform AI chat assistant for personal and team usePrivacy-conscious AI interaction without cloud data storageRapid prototyping and testing of AI promptsSelf-hosted LLM client for enterprise or home lab environmentsMobile AI assistant on iOS and Android via web app or WebContainerEducational tool for exploring LLM capabilities and prompt engineering

FAQ

What is NextChat?

Is NextChat free to use?

Yes, NextChat is completely free and open-source. There are no usage fees for the software itself; you only need to provide your own API keys or set up a self-hosted LLM backend.

How do I deploy NextChat?

You can deploy NextChat for free with one click on Vercel in under one minute, or download the native desktop client (~5MB) for Linux, Windows, and macOS. It can also be run locally via Docker or from source.

What AI models does NextChat support?

NextChat supports Claude, DeepSeek, GPT-4, Gemini Pro, and any OpenAI-compatible API. It is also fully compatible with self-deployed LLMs via RWKV-Runner or LocalAI.

Is my data private when using NextChat?

Yes, privacy is a core feature. All data is stored locally in your browser or device and is never sent to any server controlled by NextChat. Only the AI model provider receives your prompts and responses.

On which platforms can I use NextChat?

NextChat runs on web browsers, iOS, macOS, Android, Linux, and Windows. It also supports Progressive Web App (PWA) installation on mobile and desktop.