Uber, the five-year old startup running a popular app matching drivers with consumers, is once again the world's most valuable startup.
After the last round of funding, the company is now worth $50 billion. Uber is followed by Chinese smartphone vendor Xiaomi ($46 billion) and Airbnb ($25.5 billion). The Wall Street Journal currently lists 108 so called "Unicorns", companies valued at $1 billion or more by venture-capital firms. Most of them are U.S. (72) or Asia based. Only nine of them are European.
This chart shows the world's most valuable startups as of August 2015.
You will find more statistics at Statista