Twilio has introduced the Twilio Proxy API, a new API for building private text and voice conversations between customers and mobile workers. The company also announced the new Twilio Engagement Cloud, a suite of Declarative APIs with additional business process and logic built in.
Our API directory now includes 239 messaging APIs. The newest is the Parseco API. The most popular, in terms of mashups, is the Twilio SMS API. We list 169 Twilio SMS mashups. Below you'll find some more stats from the directory, including the entire list of messaging APIs.