Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Mobiniti - Mobiniti offers a mobile marketing platform for clients to invite customers to engage with their brand through SMS via their mobile phone.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
SendHub - Get a business phone system on your smartphone and computer. We provide professional, affordable sms, text, and voice solutions in an easy to use system. 14-day free trial.
Plivo - Plivo simplifies your customer engagement.
CallHub - Predictive Call Center, Voice and Text Broadcasting app