Here are descriptions of the more relevant changes in EVSS 14.0
This version introduces Private Messages: a new feature that let our customers send each other encrypted SMS. A side effect of this new feature is that PrivateGSM user interface has been generally improved. Also there's a new section called History where all call and message events are grouped by contact's name.
Support for Nexmo SMS gateway: easy and affordable SMS delivery, even to US phones numbers, with no setup costs.
It's also possible to send Installation Messages and Activation Messages via e-mail instead of SMS.
In case of secure trunks, it is possible reject insecure calls playing a message to users that will be warned about the security issue