Drupal, like the majority of the other open source CMS systems, is absolutely free. At that,

the users will be required to pay hosting services. More so, the users are able to buy custom themes and plugins or even employ professional developers to increase the beauty and performance of the sites.

The mix of the free software and the paid services give the opportunity to the users to manage their budgets and to scale their websites when necessary.

Proprietary CMS: Bespoke Systems and Support All-Inclusive  

Unlike the open source platforms, proprietary CMS platforms are commercial systems that are developed,

managed and supported by a person or a corporation. Such platforms are normally sold under license agreements or subscription levels.

These contracts allow access to customized functions,

provide customer support to special support staff and offer automated security scans and hosting. Proprietary systems Gartner defines proprietary systems as targeted at advanced problems of medium and large businesses, which require not just an advanced content management system, but professional services with a guaranteed level of dependability.  

Adobe Experience Manager: DXM Industry Leader  

One of the most proprietary CMS is Adobe Experience Manager (AEM).

Large enterprises and global organizations tend to adopt AEM to deliver sophisticated multi-channel web,

mobile, and social media interactions that are highly customized and end up offering personalized experiences. It is a CMS that offers authoring, digital asset management and workflow automation that combines content management technologies and enables marketing

departments to automate their activities so that they can easily create and manage business-critical assets.

By using Adobe Marketing Cloud, users of AEM can have a connected access to campaign management, customer data and analytics. With this ecosystem,

businesses can get insights into how to optimize the complete customer journey and engagement as well as increasing conversion rates.

The features of the Adobe Experience Manager as the enterprise-level infrastructure and requirements of a significant investment and technical knowledge suit best the large organizations.  

enhanced Marketing Automation and Personalization: Sitecore  

Another proprietary CMS is Sitecore; it is unique, due to its marketing automation,

customer experience management and personalization. organizations can tailor content and other digital interactions with visitor behavior and demographic information with Sitecore. The relevance and engagements generated by the personalization escalate customer loyalty and conversions.  

Sitecore has a powerful analytics and testing feature that allows marketers to optimize their websites and campaigns.

Its flexibility and scalability are strengths that companies seeking to centralize their efforts in digital marketing on multiple platforms and channels possess.

Nevertheless, similar to AEM, Sitecore is suits well only to the enterprises that require complex solutions and have technical resources committed to the project due to its license fees, complexity of implementation, and maintenance efforts.