Yelp Inc. is an American company that develops the Yelp.com website and the Yelp mobile app, which publishes crowd-sourced reviews about businesses. It also operates Yelp Guest Manager, a table reservation service. It is headquartered in San Francisco.
Yelp was founded in 2004 by former PayPal employees Russel Simmons and Jeremy Stoppelman. It has since become one of the leading sources of user-generated reviews and ratings for businesses.
Yelp grew in usage and raised several rounds of funding in the following years. From Wikipedia
