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
Empathy focuses on providing a user-friendly experience with strong privacy features, making it ideal for personal use and small groups. In contrast, Riot.im offers extensive customization and integration options, catering to larger teams and organizations, but may require more technical expertise.