No. 5 review site: TripAdvisor

Average monthly US traffic (Alexa): 28.27 million
US ranking (Alexa): 88
Business reviews for: any business

TripAdvisor is an travel website company where users can leave business reviews of places they’ve visited. Users can also book rooms, find flights, discover to do and reserve tables at participating restaurants. TripAdvisor operates websites internationally in over 25 countries.

No. 6 review site: Yellowpages

Average monthly US traffic (Alexa): 10.5 million
US ranking (Alexa): 402
Business reviews for: any business

YellowPages is an online internet yellow pages directory owned by YP. YP is a local marketing solutions provider that focuses on helping local businesses (and the communities within) grow.
Companies can manage their reviews on the review site after claiming a free business listing on their page.