RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
SIP3.IO TAPIR - VoIP troubleshooting, customer experience, and network performance management
Dialpad - Switch is a cloud-based phone system built for Google Apps users.
CloudCall - Communication software for your CRM
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
PhoneBurner - PhoneBurner is a cloud-based power dialer to boost sales productivity