GM isn't the only company that's looking to develop credible alternatives to Uber, although it's probably spending more money than its rivals. The firm recently threw $500 million at Lyft to gain an ownership share, and has started a joint project to build autonomous vehicles specifically for ride sharing. Ford and (Mercedes owner) Daimler are both working on their own alternatives, with the former building a minibus shuttle and the latter buying RideScout and mytaxi back in 2014.

All of them will have to work hard to topple Uber, which is regarded as the most valuable, and wealthy, startup in the world. It's one of the few companies that's capable of raising billions from private investors at the drop of a hat, and is now valued at a whopping $60 billion. It's mad money like that which enabled it to poach the entire robotics division from Carnegie Mellon university to come work on its autonomous car project. Oh, and GM is valued at only $55-ish billion, which should terrify or excite you depending on where you're standing.

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