[Matrix](https://matrix.org) is a modern, open source software for decentralized communication (like e-mail). Matrix offers end-to-end encryption, voice and video calls and much more. However, the most important thing is that there is not one Matrix server that all users have to use, like WhatsApp, Telegram and many other popular messengers.
Users can choose a public server or create their own and still communicate with all Matrix users, not just those on their own server. The messages are only stored on the participating servers. Calls also go only through the participating servers.
Feel free to register on my server or choose one from the lists linked below. I look forward to your message to [@samuel-p:matrix.sp-codes.de](https://matrix.to/#/@samuel-p:matrix.sp-codes.de?via=matrix.sp-codes.de).
Old messages and files are automatically deleted in order to maintain the performance of the server and save disk space. **Messages are deleted after one year by default.** Depending on the app, you can also set a shorter period in the room settings. **Uploaded files are deleted from the server one year after the last access.**
The Matrix server supports sliding sync, a beta feature of Matrix that significantly improves synchronization between client and server. Clients such as Element X already use this function.