We’ve been using Blackthorn Messaging (formerly Textey) for a few years at this point, and it is (and has always been) incredible! From the app itself (does what it’s supposed to, and does so simply, reliably and affordably), to its support articles (well written and well organized), everything about the app/company is excellent. Look no further; if you’re interested in sending SMS via Salesforce, Blackthorn Messaging is the app to use.