Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication over various IM protocols. Developed by The GNOME Project
License: Open Source
Adium is a versatile messaging client primarily for macOS, known for its extensive protocol support and customization options, but it is no longer actively developed. In contrast, Empathy is built for the GNOME environment, focuses on integration and ease of use, and supports voice and video calls, making it more suitable for users within the GNOME ecosystem.