Twilio Video - Real-time video infrastructure and SDK
MightyCall - Virtual phone system that lets you run your business from anywhere.
Amazon Chime - Online meetings and video conferencing
YouMail - YouMail turns visual voicemail into a personal assistant for handling all your missed calls.
100ms Live - Video and Live Streaming infra for a video-first world
cloudscale.ch - cloudscale.ch is a Swiss-based self-service cloud platform.