The Esendex SMS Ruby SDK by Esendex communicates with the API to access text messaging features, enabling developers to integrate texts into business applications in US, Europe, and Australia. Mobile and web services also available in addition to SMS.
Vonage has launched the Nexmo Messages API and Nexmo Dispatch API. The Messages API allows businesses to integrate social chat services with applications using a single API. The Dispatch API allows developers to add a fallback mechanism if the first message for a specific chat channel fails.
Onboarding users is critical, and the initial sign-up process can make or break an app's success. Enter Account Kit. Facebook's latest tool is meant to help ease the verification process on mobile devices. Facebook calls Account Kit a "complementary product" to Facebook Login.