FluentCloud - FluentCloud V3 Management Interface
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
Viber - Free and secure calls and messages to anyone, anywhere. Keep your conversations going no matter where you are.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs