TravelPerk - Corporate Travel Management
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
TravelBank - A modern travel, expense, and rewards app for SMBs.
JetRadar - Compare flights from hundreds of airlines & travel agencies
Egencia - Egencia is a corporate travel management system.
Kiwi.com - Find and book the best low-cost flights all around the world