10+ similar apps compared and reviewed
Whether you want more options like Castel SIP or a completely different take on the same concept, our curated list of 10+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.
This app allows you to make and receive internet phone calls using any SIP provider. It features a voice changer to alter your sound, send and receive chat messages, and integrates with your device's contacts. Enjoy background call reception and echo cancellation for clear communication.
This application provides internet-based voice calls and instant messaging, eliminating the need for traditional phone lines. It offers HD voice quality, contact management, and integration with other collaboration tools for enhanced productivity and cost savings.
This application functions as a SIP-based softphone, enabling users to make and receive calls and instant messages over Wi-Fi or cellular data. It integrates with a specific PBX system to support push notifications for incoming calls and messages, even when the app is not actively running.
