Depends what you consider "inventing". The Estonian technical co-founders of Skype were working together with Janus and Niklas already during Kazaa times, and w

Depends what you consider "inventing". The Estonian technical co-founders of Skype were working together with Janus and Niklas already during Kazaa times, and were co-founding shareholders and behind the whole Skype architecture from day one. I would not call that outsourcing. Of course they don't mind you calling them whatever you like, as they got their 200 mUSD part :)