Secure instant messaging system for team collaboration
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
Plivo - Plivo simplifies your customer engagement.
Bopup IM Suite - Organize secure messaging system and communicate instantly via self-hosted IM server.