Tech's Best Young Entrepreneurs

Chaim Indig, 29

Company: Phreesia

Funding: $13.25 million from HLM Venture Partners, Long River, Polaris Venture Partners, and Village Ventures

A serial entrepreneur with three startups under his belt, Indig and co-founder Evan Roberts are trying to help advertisers such as pharmaceutical companies find a better way to reach patients. Phreesia's touch-pad device, used in more than 1,000 doctors' offices, automates patient check-in, replacing a clipboard and forms. The device is free for doctors, but generates revenue from selling on-screen ads. Some patients may be unnerved to see ads related to their condition, but that's not keeping doctors from signing up at a pace of 300 to 400 a month. Three-year-old Phreesia expects to record $10 million in revenue this year.

Advice: "Continuously improve," says CEO Indig. "It doesn't matter if it's good times or bad."