I recently had to create a Servo chatbot using text messaging for a demo for a large company. We decided to use Twilio as the obvious choice — bought some numbers, created the Servo-Twilio driver, and implemented the bot. However, in the hours before the presentation, something broke.
Short Message Service is one of the best channels to get a message across. Everyone with a smartphone can send and receive messages, regardless of which instant messenger they use. It can contain images and links, and you can send it as a push notification without much hassle.