Acorns

IRVINE, CA

A micro-investing app that rounds up debit and credit card purchases to the nearest dollar, directing extra pennies into diversified portfolios of ETFs. Now offers checking account and debit card, too, for $3 a month.

Funding: $257 million; latest valuation of $860 million

Bona Fides: in past year, has almost doubled user base to 4.5 million

Ceo: noah Kerner, 41