Nomic's free app, GPT4All, is designed to run an open model on your own machine and keep the entire experience local. The app also includes support for local document chat through LocalDocs and access to thousands of models. The main appeal is that it gives users more control over how the AI runs and what it can access. Unlike other AI tools, Gpt4All allows users to run open-source language models, chat with local files, and choose from a large model library without sending your data off-device. The company also provides an easy way to build with open models, while Ollama is more focused on running offline when needed.