Drupal is a content management system (CMS) designed as a open source platform that enables you to create a website or web application from a modular and reusable architecture. Drupal is code-heavy, but it offers a wide range of features and tools that can be used to create a website or web application.
Joomla! is a content management system (CMS) designed as a open source platform that enables you to create a website or web application. Joomla! is code-light, making it more user-friendly and faster to use.
Joomla! also offers a wider range of features and tools than Drupal, making it a more versatile CMS. However, Joomla! is not as code-heavy as Drupal, so it may not be the best choice for a project that requires a high level of customization or flexibility.