Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Ant Media Server - Scalable, Ultra Low Latency & Adaptive WebRTC Streaming Ant Media Server provides Scalable Ultra-low latency (0.5 seconds) Adaptive Live Streaming with WebRTC. It supports RTMP, RTSP, Zixi, WebRTC, Adaptive Bitrate, HLS and MP4 recording.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Red5 - Red5 is an open source Flash media server for live streaming solutions of all kinds.
Plivo - Plivo simplifies your customer engagement.
MistServer - MistServer is a lightweight, open-source multistandard multimedia server.