Source Defense Protect by Source Defense is an automated web security solution designed to safeguard against client-side threats and ensure data privacy compliance. It protects data at the point of input by extending security to the browser, where most data theft occurs. The product secures code and manages third-party digital supply chain risk by controlling the actions of third-party JavaScript on websites. Source Defense Protect acts as a sandbox for JavaScript running on websites, isolating it from the web browser in real-time and preventing malicious code execution.