Robinhood

Palo alto, ca

Mobile app offering basic stock trades for free and no-interest margin loans for $10 a month. Soon to offer free trading in Bitcoin and Ethereum.

Bona Fides: 3 million users Cofounders & CO-CEOS: Baju Bhatt, 33, and Vlad Tenev, 31 (above)

Funding: $176 million; latest valuation of $1.3 billion