Facebook and Google are in separate talks to enter joint ventures with Skype, Reuters reported on Thursday. Facebook’s CEO Mark Zuckerberg has also reportedly been in clandestine meetings discussing an all-out purchase of the VoIP service. Skype’s IPO, which is expected to occur later this year, could be worth $1 billion, however, deals with Facebook or Google could bring in as much as $3-$4 billion, Reuters said. Skype 5.0 launched in October of this year and added tight Facebook integration, but the social network has yet to include native video calling into its website or mobile applications. Google could benefit from Skype’s mobile technology to build out its Android video-chat feature, too, which just launched late last month. Neither company has offered a comment on the matter.