Kayak.com, sometimes styled as KAYAK, is a fare aggregator and travel metasearch engine operated by Booking Holdings.

Amazon.com, Inc., is an American multinational technology company based in Seattle, Washington, that focuses on e-commerce, cloud computing, digital streaming, and artificial intelligence.

Uber offers peer-to-peer ridesharing, ride service hailing, food delivery, and a micromobility system with electric bikes and scooters. The company is based in San Francisco and has operations in over 785 metropolitan areas worldwide.

Earny is a personal assistant that automatically gets you money back when prices drop Earny has automated the price protection benefit offered by the major credit card issuers and retailers.