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
Tox and Ricochet are both secure messaging platforms focused on privacy and decentralization. Tox offers a more comprehensive feature set including group chats and file sharing without a central server, while Ricochet provides voice call support and user discovery but relies more on central servers.