What are some alternatives?
When comparing Apphitect IM and Plivo, you can also consider the following products
Mirrorfly - A Complete Chat, Video & Audio Calling Solution
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
SendBird - SendBird is messaging-as-a-service.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.