Robo-advisors are digital platforms that provide financial planning services, but instead of working with a human through your computer, you work mostly with the computer itself. Based on your needs, the robo-advisor can help you manage your portfolio and work toward your goals.
Check out Betterment, Wealthfront, Personal Capital, and Ally Invest. Some robo-advisors have account minimums to get started ranging from $500 to $25,000, but still many of them let you get started with no account minimum at all.