How Marketplaces Are Building Their Own Travel Booking Stacks

Marketplaces like Airbnb, Uber, and Expedia have long relied on third-party travel inventory systems—Global Distribution Systems (GDS) and Online Travel Agencies (OTAs)—to power flights, hotels, and car rentals. But a wave of in-house travel booking stacks is emerging: Airbnb acquired a hotel-booking API startup in 2025, Uber quietly built its own ground-transport inventory layer, and smaller marketplaces are using open-source tools to build bespoke trip-planning engines. In this episode, Lucas and Luna unpack the economics: why owning the booking stack reduces per-transaction costs by 30-50 basis points, how proprietary data on user preferences lets platforms bundle services with higher margins, and the surprising catch—maintaining a multi-supplier inventory system costs roughly $8-12 million annually in engineering and compliance. They also explore the flip side: the risk of supplier conflict when a marketplace becomes both partner and competitor. Specific example: Airbnb's 2025 acquisition of Arrived, a small hotel-booking API startup, gave it direct access to 200,000+ hotel properties without going through Expedia's API. This is a story about vertical integration in the travel marketplace space, where the line between platform and travel agent is blurring fast. #Airbnb #Uber #Expedia #BookingStack #TravelTech #VerticalIntegration #Marketplace #GDS #API #Arrived #HotelBooking #PlatformEconomy #Business #Technology #FexingoBusiness #BusinessPodcast #TravelIndustry #InventoryLayer Keep every episode free: buymeacoffee.com/fexingo