Uphold login has a strong security track record. However, there has been at least one minor security incident in November 2018 where its mail service account (not the exchange) was compromised. In contrast, Uphold users can purchase multiple assets using an ACH withdrawal or bank account fee-free. Like Coinbase, Uphold users pay 3.99% to use a credit card. However, the spread is much higher on Uphold and varies widely.