55. Alexandra Chong

Founder, Lulu

Lulu lets women anonymously rate men they know. The app, which pulls in Facebook information to detect your gender, lets women discuss a guy's ambition, appearance, and more using mini quizzes and hashtags.

This year, Lulu decided to let men sign on to the app too. Guys can check their scores (from 0 to 10) on the Lulu app, and can receive analytics about their profiles (including the number of women who have searched for them, rated them, and followed them). Allison Schwartz, who launched the app with Chong, says over 1 million guys have downloaded Lulu.