Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with users of a different service provider via online chat, Voice over IP, and Videotelephony. Developed by Matrix.org
License: Open Source
Matrix.org is a decentralized communication platform with a focus on integration and customization, while Conversations is a more user-friendly application that prioritizes simplicity and privacy. Matrix.org offers extensive features for developers and advanced users, but can be complex to set up, whereas Conversations is easier to use but may lack some advanced features.