Supplier Ratings Data: External Reviews Share Supplier-dedicated ratings sites have existed for nearly two decades. Some travel managers are working to incorporate supplier ratings within their internal social media sites or company travel apps.Pros & Cons: Travelers easily can peek at such free websites before they book. Finding ratings on other sites like Facebook and Yelp has become easier, and TripAdvisor launched an airline review platform in July 2016. Monitoring such sites, though, can be time consuming.Access/Format: Companies like RouteHappy and Olset, which Deem acquired in October 2016, also have integrated via APIs with travel management companies to provide such information at the time of booking, or they can provide it directly to corporates. While glancing at sites like TripAdvisor is free, subscriptions to RouteHappy and Olset will cost you. Fees depend on the company size, the number of merchants a client wants to monitor, the number of reviews and calls to an API. The data is available as a raw data dump, Excel, text file or other format.