“Razzn brings you the next generation of messaging, designed specifically for businesses. Instant messaging gives YOU control of your business communications. No more spam, simply remove the user sending it. See if a message was delivered, and chat in real time.”, accordingly to their App Store profile: https://itunes.apple.com/us/app/razzn/id1134149655?mt=8
Visit the Website at http://www.razzn.com!