WHATSAPP IS WORKING ON SECURE CROSS-APP MESSAGING TO CONNECT USERS ACROSS PLATFORMS

Summary from the TLDR newsletter

WhatsApp has been working on an initiative for two years that will allow its users to send messages across different messaging applications using end-to-end encrypted methods. The initial phase of the interoperability rollout will enable basic functionalities such as text, image, voice message, video, and file sharing between individuals. Advanced features such as calls and group chats are expected to be introduced later. The feature will be opt-in. Third-party apps will have to encrypt their messages using Signal's encryption protocol and meet specific technical standards.