Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols. Developed by Pidgin
License: Open Source
Tox is a privacy-focused messaging app with built-in end-to-end encryption and a modern interface, making it ideal for those prioritizing security. In contrast, Pidgin is a versatile messaging client that supports multiple protocols but lacks robust security features, making it better suited for users who need flexibility and connectivity.