This document summarizes three case studies of online travel companies: 1) GeniusTravel allows travelers to search for flights based on budget rather than destination in response to the question "Where can I go for 100 euros?". Their app leads with the traveler's budget. 2) TripRebel aims to increase price transparency when booking travel. Their mission is to make the travel booking experience exciting and ensure travelers get a good deal without overpaying for hotels. 3) TripGems wants to make hidden travel gems more accessible with social sharing. Their mission is to be the authority in recommending "things to do" and sharing deals, with a focus on engagement and location-based experiences.