Uber is probably the most successful startup. The San Francisco startup is now valued at over $18 billion. It is now raising $1 billion at a valuation of $40 billion. Uber was founded in 2009 and in 6 years, it is available in 45 countries and more than 200 cities. In many countries, the local taxi drivers are protesting against Uber. Uber has also partnered with various apps like Spotify, Google Maps and Tablelist.