SendinBlue Java Library provides developers with information on how to send email campaigns from their applications using the SendinBlue API. Developers can use this resource to integrate with their Ruby applications.
Nexmo's mission is to take SMS global, putting messages on the 5 billion smartphones across continents and languages, with 800 carriers in 200 countries. As Alex Williams noted in Techcrunch, Nexmo raised $3 million from Intel Capital, NHN Investment Corporation and Initial Capital. Nexmo is:
"one of a new generation of companies that are disrupting the telco market. It streamlines the layers between the telcos and developers, removing the hubs by offering a carrier grade service based upon a worldwide network that gives companies like Airbnb an international messaging platform for communicating between buyers and sellers over SMS."
The RESTful and SMPP APIs save large multinationals from having to build their own infrastructure.