Yelp

Yelp publishes crowd-sourced reviews of restaurants, shops and local services, and sells advertising, reservations and lead generation tools to the businesses listed on it. The site shaped how a generation of consumers chose where to eat and which contractor to call, and it remains one of the largest local discovery platforms in North America with tens of millions of monthly users. Listed on the New York Stock Exchange since 2012, the company has expanded from reviews into bookings, food ordering and home services.