The API and SDK are easy to build on. I connected our own sales app to it in a few days, and sending, delivery reports, replies and STOP handling all work. When our new vetting score wasn't showing, support jumped in on chat, found the problem and resubmitted our campaign the same morning. We went from 2,000 to 40,000 texts a day on T-Mobile in about 15 minutes. Review collected by and hosted on G2.com.

It isn't obvious that a new vetting score doesn't count until support resubmits the campaign. I only found out by asking. The usage counter in the throughput API also didn't match the dashboard for us. Review collected by and hosted on G2.com.