Yelp existed in the 21st century.
Yelp . Yelp was founded in 2004 by former PayPal employees Russel Simmons and Jeremy Stoppelman . By 2010 it had $ 30 million in revenues and the website had published more than 4.5 million crowd-sourced reviews . In 2009 it entered several negotiations with Google for a potential acquisition . Yelp became a public company in March 2012 and became profitable for the first time two years later . As of 2016 , Yelp.com has 135 million monthly visitors and 95 million reviews .