Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
RingCentral Contact Center - The Collaborative Contact Center solution from the industry
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Dialfire - Cloud Calling at Jet Speed
Plivo - Plivo simplifies your customer engagement.
contactSPACE - contactSPACE is a cloud contact centre software for the SME.