Headquartered in San Francisco, Kraken was founded in 2011 as the most traded bitcoin exchange in the euro and can also be traded in Canadian dollars, U.S. dollars, British pounds and Japanese yen. Kraken has been named the best and safest bitcoin exchange by the independent news media. Kraken is the first bitcoin exchange to display transaction prices and volume on Bloomberg terminals, the first foreign exchange reserve auditor to pass cryptographic verification and is the partner of the first cryptocurrency bank.March 2014 Awarded $ 3 million angel round of financing, the main investor for Hummingbird Ventures (Hummingbird Ventures). Currently, Kraken is among the most active digital currency exchange in the United States. According to the current figures of Bitcoin Charts, the Kraken platform has a daily turnover of 4,579 BTC, outpacing rivals ANX and BTC-e.advantage:Transaction fee is reasonable,Withdrawal fee is lower,High degree of globalization.Disadvantages:Payment is limited,Not suitable for beginners.