The Nexmo SMS API is a service that allows you to send and receive SMS messages anywhere in the world. Nexmo provides REST APIs, but it's easier to use their official Java SDK. This tutorial covers how to send and receive SMS messages with the SDK so that you can use them in your applications.
Cloud communications provider MessageBird today launched Programmable Conversations, a single API that allows developers to integrate with a number of popular communication platforms. The platfroms supported in today's launch are SMS, Facebook Messenger, WhatsApp, WeChat, Telegram and Line.