What are some alternatives?
Twilio - Brings voice and messaging to your web and mobile applications.
Bandwidth - Track your Wi-Fi hotspot usage. Zero configuration required. It just works.
Plivo - Plivo's Voice API enables businesses to build Voice apps to reach customers globally in 200+ countries. Try Plivo's Voice API for free. Instant Sign Up.
My Music Moments - A community of music curators and producers
CoFoundersLab - Meet 250,000+ entrepreneurs online
VoxImplant - Voximplant is a software program that allows businesses to automate communications by setting up automatic communication systems in the cloud.