CallHippo - Easy to use Phone System with World-Class Support
CloudCall - Communication software for your CRM
Callmama - Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
KrispCall - Virtual cloud phone system for business
PhoneBurner - PhoneBurner is a cloud-based power dialer to boost sales productivity