I have used miSecureMessages for several years. It's nice that when I receive a message on the miSecureMessages, it's important and will not be mixed in with all my general text (SMS) messages. Also, it can link to on-call and personnel schedules. Review collected by and hosted on G2.com.
I don't have anything that I dislike. It seems to be much faster than a pager and can work on your mobile network or Wifi. The built-in encryption also makes it compliant with many security protocols like HIPAA. Review collected by and hosted on G2.com.
