Twilio - Brings voice and messaging to your web and mobile applications.
FluffyChat - Open. Nonprofit. Cute ?
Plivo - Plivo simplifies your customer engagement.
Talk360 - Talk360 is a best-in-class communication utility that offers a convenient way to connect with loved ones globally.
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Go Transcribe - Advanced cloud based transcription service powered by artificial intelligence