What are some alternatives?
When comparing QuickBlox and Plivo, you can also consider the following products
Twilio - Brings voice and messaging to your web and mobile applications.
Contus Fly - Contus Fly, an instant messaging solution for real-time mobile chat app development. Build 100% customizable mobile chat . be reachable at any given time.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
VoxImplant - Voximplant is a software program that allows businesses to automate communications by setting up automatic communication systems in the cloud.
Gupshup - GupShup provides a scalable and reliable cloud messaging platform.