KOOKOO - All in one solution for calls, IVR, live chat, customer management & more.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Dialfire - Cloud Calling at Jet Speed
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
HoduCC - HoduCC is a FreeSWITCH based product which offers contact center softwares for call centers.
Plivo - Plivo simplifies your customer engagement.