Twilio - Brings voice and messaging to your web and mobile applications.
Plivo - Plivo simplifies your customer engagement.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
SightCall - SightCall offers comprehensive real-time video APIs and Mobile SDKs that makes it simple to embed...
Bandwidth - Bandwidth offers SIP trunking, Emergency communications, and Voice & Messaging APIs.
Vidyo.io - Our hosted video chat API makes it simple for devs to embed beautiful multiparty video into apps on any device. Learn more here: https://t.co/4b5EbRg0SG