TripAdvisor 和 Viator是一家的。都可靠。

Viator and TripAdvisor are essentially the same entity for booking, as TripAdvisor owns Viator, but they function differently: TripAdvisor is a massive review-based travel research site, while Viator is a specialized third-party reseller focusing on booking tours and experiences. Both offer similar inventories, but TripAdvisor is better for research, while Viator often lists more, varied, and longer-form tours.