Skype differs from other VoIP-systems by several factors:
Skype is very popular. During the first week in August of 2003, more than 60 thousand people downloaded the Skype-client. Today, Skype is available for the following operating systems: MS Windows, MacOS, IoS, PocketPC, Android and Linux.
NeuVoice is a service provided by NeuWorld Communications, inc. NeuWorld is headquartered in Tampa, FL, however NeuWorld maintains locations in Dallas, Cleveland (Akron) OH and Southern CA (Long Beach area).