Commenting module

If you are looking for commenting or forum services, you have several options:

• Magnolia commenting service – Magnolia offers a basic commenting service in the cloud. It's a REST-based service hosted by Magnolia International. The service is secure, contains no advertising, works also for intranet sites and avoids having to cluster the comments in a multi-instance setup. You can connect the service to an on-premises or cloud Magnolia instance. See a live example on Magnolia's own blog. Contact Magnolia Services if you are interested in this option.
• Third-party integration – Most Magnolia sites today choose to integrate a third-party commenting or forum system. There are several on-premises and hosted services on the market such as Disqus, IntenseDebate and Discourse. Forum services have evolved to support features such as badges, reputation management and search engine optimization that are beyond what the Magnolia Forum module offers today.
• Legacy modules – You can still get the Magnolia Forum and Commenting modules from Nexus for your own Magnolia bundles. The Forum module also requires the magnolia-core-compatibility .jar to be in the classpath to function properly. 

If you insist in using the old Magnolia module:

The Commenting module adds a commenting functionality to any Magnolia page. 

Installing

<dependency>
  <groupId>info.magnolia</groupId>
  <artifactId>magnolia-module-commenting</artifactId>
</dependency>