Kopete is a multi-protocol, free software instant messaging client released as part of the KDE Software Compilation. Although it can run in numerous environments, it was designed for and integrates with the KDE Plasma Workspaces. Developed by kde.org
License: Open Source
Kopete is a versatile instant messaging client that supports multiple protocols, making it suitable for users needing legacy support. In contrast, Riot.im (now Element) focuses on decentralization and security, offering modern features such as end-to-end encryption and a rich media experience.