Robinhood is a commission-free stock trading platform popular with younger investors. It makes money through payment for order flow and interest on idle cash in customer accounts. Founded in 2015 by Baiju Bhatt and Vlad Tenev, Robinhood has grown rapidly and now offers cryptocurrency trading and cash management accounts in addition to stock trading. While Robinhood has disrupted the industry by eliminating trading fees, critics argue it has conflicts of interest due to its payment for order flow model and lacks robust customer support compared to competitors like Charles Schwab, E-Trade, and Fidelity.