I would not compare TeamSpeak to Skype. Though they are both methods of talking with voice over the internet, they are two separate genres. TeamSpeak, Ventrilo, and Mumble are all voice software that allows individuals to log into hosted voice servers and talk with others using their voice. If you are unable or unwilling to talk you can type, though this is often not paid attention to nearly as much as voice. Once you try out a voice server, you quickly realize that when possible, you want to always use voice because it is an easier method of communication, and less is lost in translation. It is great for group conversations.