Verdict: Founded in 2014, quickly amassed over 13.6 million users. Never hacked, utilises cold storage & 2FA. Supports over 23 currencies with users assigned a multi-currency wallet. Convenience fee 0.50% higher than standard market rate. Only supports one Fiat currency, USD. A great exchange for experienced traders, newer traders may have difficult with interface. KYC checks add security, although some users may wish to remain private. No credit checks or deposit fees. Low withdrawal fees with a free <10 per calendar month, per withdrawal.