Twilio - Brings voice and messaging to your web and mobile applications.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Gather Town - Spatial video-chat worlds for work and play
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
ivicos - CAMPUS provides all kinds of office interaction in a beautiful virtual place that helps you and your colleagues to have a great workday.