NerdWallet reviewed 18 robo-advisors, which together constitute the majority of that market based on their assets under management. We then isolated the ones that offer a savings or cash management account that's separate from the investment account, which resulted in a field of 13. Some of the providers are NerdWallet partners, but this did not influence our selection of the winner.
How we chose the winner:
NerdWallet evaluated each provider's annualized rate of return as stated on Nov. 13, 2020, the date we closed our judging. The provider with the highest rate was named our winner for cash management.
How we verified our data:
NerdWallet writers sent detailed questions to all reviewed companies. NerdWallet writers and editors also confirmed fees, rates, policies and other key features on each company's website.