KAYAK vs Viator
Side-by-side comparison of AI visibility scores, market position, and capabilities
Leading travel metasearch engine owned by Booking Holdings; searches 100s of sites for flights, hotels, cars. Operates KAYAK, Momondo, and HotelsCombined.
About
KAYAK is a travel metasearch engine founded in 2004 by Steve Hafner and Paul English, acquired by Booking Holdings (then Priceline Group) for $1.8B in 2013. Headquartered in Stamford, Connecticut, KAYAK aggregates flight, hotel, car rental, and vacation package results from hundreds of travel sites, enabling one-click comparison shopping. Its product suite includes KAYAK.com, the Momondo brand (acquired 2017), HotelsCombined, and a business travel management platform, KAYAK for Business.\n\nKAYAK's revenue model is primarily CPC (cost-per-click), charging airlines, OTAs, and hotels for qualified referrals rather than taking a booking commission. This metasearch model positions KAYAK as a neutral aggregator rather than a competing OTA, though it also offers direct booking through its platform in select categories. KAYAK for Business targets corporate travel managers with policy controls and expense integrations.\n\nAs a wholly owned subsidiary of Booking Holdings ($26.9B revenue FY2025), KAYAK does not report standalone financials. It remains one of the most visited travel websites globally, with over 300 million monthly searches across its brand portfolio. KAYAK's AI trip-planning features and integration with Booking.com inventory have strengthened its position as a one-stop travel research tool heading into 2026.
World's largest tours and experiences OTA owned by Tripadvisor; FY2024 revenue $840M (+14% YoY); 300,000+ experiences in 190+ countries; B2B distribution API powers experiences on Booking.com and American Express Travel for 1B+ Tripadvisor review-backed discovery.
About
Viator is the world's leading online marketplace for tours, activities, and travel experiences, founded in 1999 in Brisbane, Australia, and acquired by Tripadvisor in 2014. The platform lists over 300,000 experiences—city tours, outdoor adventures, cooking classes, skip-the-line tickets, and private guides—across 190+ countries. Viator operates both a consumer-facing marketplace and a B2B distribution API that powers experiences inventory on Booking.com, American Express Travel, and hundreds of affiliate partners.\n\nViator's operator network includes both large tour companies and independent local guides, with a dynamic pricing and availability management system that enables real-time booking. The platform's deep integration with Tripadvisor's 1.4 billion reviews creates a powerful review-to-booking funnel unique in the experiences category. Viator operates on a commission-based model, charging operators 20–25% per booking with no upfront listing fees.\n\nViator reported full-year 2024 revenue of $840M (+14% YoY) and Q4 2024 revenue of $186M (+16% YoY). The tours and activities market is estimated at $300B globally, with online penetration still below 20%, positioning Viator for continued structural growth. Viator's B2B distribution API and white-label solutions expand its reach well beyond direct consumer traffic.
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