Adobe Experience Manager vs Grav

Adobe Experience Manager (AEM) is an enterprise content management system developed by Adobe Inc. for building websites, mobile apps, and forms. It combines digital asset management with a web content management system as part of the Adobe Experience Cloud platform. AEM is used by large organizations for managing marketing content at scale across channels.

Grav is a cms tool that flat-file cms built on php with markdown content, twig templating, and an optional admin panel plugin. It is open source software.