Twilio - Brings voice and messaging to your web and mobile applications.
MirrorFly - World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises
Plivo - Plivo simplifies your customer engagement.
echofin - Echofin helps communities grow, engage and monetize their following in ways no other platform has done so far.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
chatwee - Group chat app for online communities. Used wherever visitor interaction and engagement are key to the site's functioning.