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 predominantly a video doorbell and security camera system with high-quality video, smart alerts, and integration with smart home devices, making it ideal for security-focused users. In contrast, IM+ offers a more budget-friendly solution with long battery life and customization options, but it lacks video capabilities and is better suited for less security-intensive applications.