Rapyd Framework is a framework for building business web apps that can run with or without a server and be used offline through synchronization. It uses PouchDB for the database, an ORM designed like Odoo's, and progressive web apps. RapydScript allows the same codebase to run on both the server and client for faster development while maintaining security. The framework aims to be faster than traditional server-side MVC frameworks and more familiar for Odoo developers. It enables offline use, multi-master synchronization, and leverages the performance of JavaScript's just-in-time compilation.