Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Viber - Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
MiVoice Business - MiVoice Business is a business communication platform that delivers voice, messaging, mobility, presence, conferencing, collaboration and applications.
3CX - Hosted PBX with CRM integration and mobile apps
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.