Kadu is a free and open source multi-platform instant messaging client that supports Gadu-Gadu, XMPP IM networks and other services based on XMPP like Google Talk. Developed by KaduTeam
License: Open Source
Kadu offers a user-friendly interface with a focus on security and privacy, making it ideal for users who prioritize encrypted communications. In contrast, Bleep excels in real-time communication with robust voice and video call functionalities, making it more suitable for active collaboration and group discussions.