Waymo LLC is an American autonomous driving technology development company. It is a subsidiary of Alphabet Inc, the parent company of Google. Waymo operates a commercial self-driving taxi service that operates in the greater Phoenix, Arizona area called "Waymo One", with Chandler, Arizona fully mapped. In October 2020, the company expanded the service to the public, and it is the only self-driving commercial service that operates without safety backup drivers in the vehicle. Waymo also is developing its driving technology for use in other vehicles, including delivery vans and Class 8 tractor-trailers for delivery and logistics.