Betterment is a great option if you want an automated, low-fee portfolio from the largest independent provider of digital accounts. Betterment was a pioneer in providing "set-it-and-forget-it" portfolios for a low-fee.
Consider Merrill Guided Investing if you want a simple automated portfolio with potential fee discounts for existing Bank of America and Merrill Lynch customers.
Betterment
Automated
Merrill Lynch
Automated