Global Digital Asset Exchange (GDAX) is the leading U.S. based digital currency exchange. We undergo regular IT security and financial audits. In addition, 98% of customer bitcoin is stored entirely offline. For more information visit our security page. Our investors include the New York Stock Exchange, Andreessen Horowitz, Union Square Ventures, and more. The total balance of Bitcoin & Ether held online by GDAX is insured against hacking and theft. The leading digital asset exchange company, Coinbase has raised more than $106M from top tier investors and is the largest bitcoin wallet and merchant platform in the world.