Twilio - Brings voice and messaging to your web and mobile applications.
Carry - Executive assistant for travel on Slack
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Swap - Instantly follow someone on multiple social platforms
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Revenue - Revenue is a native advertising platform serving advertisements across all devices.