MeetingMogul - Join any conference call with one-touch
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
CALLR - CALLR is an extremely helpful app for those who have to deal with call control protocols for their business. You can create a customized call control system that will perform a wide range of functions.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
MobileDay - MobileDay provides one-touch access into conference calls and online meetings from iOS or Android devices.
Plivo - Plivo simplifies your customer engagement.