Dialfire - Cloud Calling at Jet Speed
Melrose Labs SMSC Simulator - SMPP SMSC simulator to test SMS messaging applications.
KOOKOO - All in one solution for calls, IVR, live chat, customer management & more.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Aircall - Aircall is a call center software of a new generation designed for fast growing companies. Setup instantly and integrates to your CRMs
Twilio - Brings voice and messaging to your web and mobile applications.