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.
Mitel - Business Communications and Collaboration
CallHippo - Easy to use Phone System with World-Class Support
Phonebooth - Phonebooth is one of the leading voip providers, providing phone systems & phone service for small businesses.
KrispCall - Virtual cloud phone system for business
Eir SIP Voice - eir SIP Voice is revolutionizing the core communications tool of business that carries both calls and data over just one connection.