The Sinch SDK allows developers to add voice calling and/or instant messaging to their web apps. It handles signaling and audio management and also provides the ability to create user interfaces. This first release supports only instant messaging and app-to-phone calling with app-to-app calling to be added at a later date.
Our API directory now includes 255 SMS APIs. The newest is the Msg2send API. The most popular, in terms of mashups, is the Twilio SMS API. We list 171 Twilio SMS mashups. Below you'll find some more stats from the directory, including the entire list of SMS APIs.
The Ez Texting is a simple solution to a problem many developers have in the mobile world. The Ez Texting API allows developers to send SMS text messages to phones in the US and Canada. It recently had a major update, as did its related TellMyCell API and Club Texting API, adding a full REST API to the previous HTTP methods. It also added the functionality to send a text to a number of phones with one API call.