Coinbase is a leading digital currency platform and wallet where sellers and buyers can transact with new types of digital currencies such as Bitcoin, Ethereum, Litecoin, and Bitcoin Cash. The exchange was founded by Brian Armstrong and Fred Ehrsam in 2012 and is based in San Francisco, California. They focus on the US market, however, the company currently operates in 31 countries and offers storage of bitcoins in 190 countries around the world.
BITBOX is a Singapore-based cryptocurrency exchange launched in 2018. The team behind this platform is better known for a different project — messaging app LINE. The exchange is not available for the American citizens and doesn't support fiat money yet, but allegedly these problems are going to be addressed in the future. The trading volume is relatively low on BITBOX. By all valuations, this exchange ranks below the 100th position.
ShapeShift was founded by Eric Voorhees in 2014. Online exchanger based in the Swiss town of Geneva. The main function is the quick conversion of bitcoin and popular altcoins with the highest possible protection of transactions. The peculiarity of the exchange is that client assets are not stored on the site itself. And this, undoubtedly, increases the security of the service, although it somewhat impoverishes the functionality. You can find more information on the ShapeShift team and the project here.