Google acquired Zagat in 2011, paying $151 million to purchase the restaurant-rating company. The deal, which added reviews of establishments in more than 100 cities, was meant to boost Google's local business listings. Google integrated Zagat's reviews into its widely-used Google Maps service, so when people are searching for locations, they can see businesses as well. The company recently overhauled the service, updating the site, introducing new iOS and Android apps, and making it free to access the directory. Unfortunately for Google, it still hasn't been able to compete with Yelp, which is at the moment is conquering this market.