Parakeet - Cloud-based phone system with mobile app, designed for teams
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Convoso - Call center solution to covert leads faster
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
KronoDesk - KronoDesk is a web-based help desk solution.
Plivo - Plivo simplifies your customer engagement.