Viber Out to challenge Skype Out
Viber [introduced](http://www.financialpost.com/markets/news/Viber+Launches+Viber+Worldwide+Allowing+More+Than+Million+Users+Make/9266858/story.html) its Viber Out during the recent typhoon disaster i
10 December 2013 2 min read skype skype out viber viber out voip