Session
Session is an end-to-end encrypted messenger that prioritizes privacy and security. Operating on a decentralized network, it requires no phone number or personal data for user registration. Instead, it uses unique Session IDs, minimizing the amount of data shared or stored.
Matrix
Matrix is an open-source communication protocol and decentralized network that enables secure, real-time messaging and collaboration across various platforms and services. It is designed to foster interoperability and end-to-end encryption for communication applications. Clients are needed to chat using Matrix – you can choose from a wide variety for different operating systems.
Signal Messenger
Signal Messenger is a privacy-focused messaging app known for its strong encryption and open-source nature. With a clean, simple UI and familiar features, it is the strongest contender to WhatsApp for those who don’t wish to use the Meta ecosystem.