GPT4All

GPT4All was born from a simple ambition: make language models accessible to everyone, locally and privately. Developed by Nomic AI, this open source project became the 3rd fastest-growing GitHub repository of all time, with over 65,000 stars and 250,000 monthly active users.

The desktop application is designed to be the simplest gateway to local AI. Installation is a double-click on macOS, Windows or Linux, and you can start chatting with a model within minutes. The interface is clean, jargon-free, and lets you switch between different models with a single click.

GPT4All's flagship feature is LocalDocs: it lets you index your local documents (PDF, DOCX, TXT, code) and query them via RAG (Retrieval-Augmented Generation). Your files stay on your machine, and the model uses their content to provide contextualized answers.

GPT4All supports over 1,000 open source models and also works in pure CPU mode, making local AI accessible even without a dedicated GPU. For developers, a Python library enables integration into scripts and applications.

Nomic AI also offers a free Enterprise edition with dedicated support for organizations that want to deploy local AI at scale.