Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android. Developed by Savoir-faire Linux
License: Open Source
Ring is primarily focused on smart home security, offering features like video doorbells and home monitoring, while Telegram is a messaging app with a strong emphasis on privacy and multimedia sharing. The two cater to different user needs, with Ring targeting home security and Telegram focusing on communication.