NerdWallet reviewed 22 robo-advisors, a mix of established firms with the greatest market share and younger companies. Some of these are NerdWallet partners; some are not.
How we chose the winner:
NerdWallet evaluated each provider across the weighted criteria below to determine the winner for IRA investing:
Management fees (50%).
Expense ratios (20%).
Portfolio mix (20%).
Automatic rebalancing (10%).
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.