Kraken is a cryptocurrency exchange based in San Francisco, California. The company was founded in 2011 and has grown to over 1,000 employees. The company allows users to buy and sell a wide range of cryptocurrencies, including Bitcoin, Ethereum, and Litecoin. The company also offers margin trading and futures trading. The company has been recognized for its security measures and has never been hacked. The company has also been involved in several high-profile cryptocurrency investigations.