One of the cool things our directory data allows us to do is to get a glimpse at both short term and long term trends in the API space. One slice of data worth looking at is the categories have had the most growth. This article looks at which categories have grown the most in the last five years.
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.