Twilio is a cloud communications (IaaS) company that allows to make and receive phone
calls, send and receive text messages programmatically using its web service APIs.
Agile CRM integrates with Twilio Integration to offer Mobile Marketing functionality to
its customers. No downloads and installations, a one time integration enables you to send
out bulk messages using mobile campaigns to engage your contacts on the mobile space.
Here's a detailed setup description of the Agile's Twilio SMS integration