Ally BankAccount detailsAPY: 3.9%Minimum opening deposit: $0Ally Bank’s 6-month CD currently offers 3.9% APY with no monthly maintenance fees and minimum opening deposit requirement. Read our full review of Bank5 ConnectBask BankAccount detailsAPY: 4.05%Minimum opening deposit: $1,000Bask Bank’s 6-month CD has a higher minimum opening deposit at $1,000. Bask BankAccount detailsAPY: 3.85%Minimum opening deposit: $1,000Bask Bank’s 18-month CD provides a competitive 3.85% APY with a minimum opening deposit of $1,000. We evaluated these accounts according to several key metrics, including annual percentage yield, minimum opening deposit, compounding frequency, and more. Accounts with no or low minimum deposit requirements ranked more favorably than those with higher opening deposit requirements.