eXo and Red Hat / JBoss
Since 2009, Red Hat and eXo have worked together to build a new open source community project called GateIn. The GateIn portal framework project represents a merger of the former JBoss Portal project and the eXo Portal. GateIn, released in early 2010, is the foundation for the enterprise-supported offerings from both companies: eXo Platform and JBoss Enterprise Platform Portal.
eXo Platform integrates GateIn, the same portal framework as JBoss EPP 6 that both companies co-led. Both solutions support JBoss EAP 6. However, eXo Platform 4 comes with complete social and collaboration features, as well as extensive content management capabilities.