74. Sam Zaid, Elliot Kroo, Jessica Scorpio

Cofounders, GetAround

Getaround, a car-sharing startup that lets users rent cars from each other, raised its first round of funding last year. Investors including Yahoo CEO Marissa Mayer, Shervin Pishevar, and Eric Schmidt's Innovation Endeavors pumped in $13.9 million to the startup in August. 

But Getaround is not the only one bringing in dough. Its users are too. Getaround car owners, on average, make $350 per month, Getaround CEO Jessica Scorpio told Business Insider back in August.

Getaround also launched a new business called Getaway last year, which enables car owners to rent out their cars for extended periods of times. 

It wasn't easy getting the startup off the ground. Scorpio and her team had to get laws changed to do it, because insurance companies didn't like the idea of sharing cars with non-owners.

"We started to plant the seeds in Sacramento. Democrats really like it because it's green; Republicans really like it because it's small business," Scorpio told Inc. of her law proposal.