Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption. Developed by Project Tox
License: Open Source
BlackBerry Messenger is a secure messaging app with a strong focus on integration within the BlackBerry ecosystem, while Tox is a decentralized, open-source platform prioritizing user privacy and anonymity. Both offer cross-platform support and secure messaging, but Tox's decentralized nature offers a unique advantage in terms of privacy.