Trillian is a proprietary multiprotocol instant messaging application. Developed by Cerulean Studios
License: Freemium
Trillian is a cross-platform instant messaging client that supports multiple protocols, making it versatile for personal use, whereas Openfire is a server-based XMPP solution that excels in customizable, scalable communication for organizations. While Trillian focuses on user-friendly messaging, Openfire provides robust tools for team collaboration and management.