Skype was founded in 2003, eBay bought it in 2005 for $2.6 billion. eBay later sells 70% of the company to investors in 2009. In 2011 Microsoft buys skype for $8.5 billion. In just 8 years the company went from inception to a sales price of $8.5 billion, that is nothing short of impressive. When looking to learn from a case study Skype is a great one.