PetSmart Inc. is a privately held American chain of pet superstores, which sell pet products, services, and small pets. It is the leading North American pet company, and its direct competitor is Petco. Its indirect competitors are Amazon, Walmart, and Target. As of 2020, PetSmart has more than 1,650 stores in the United States and Canada. Its stores sell pet food, pet supplies, pet accessories, and small pets. Stores also provide services including grooming, dog daycare, dog and cat boarding, veterinary care via in-store third-party clinics, and dog training. They also offer dog and cat adoption via in-store adoption centers facilitated by the non-profit PetSmart Charities.

Petco Health and Wellness Company, Inc. is an American pet retailer with corporate offices in San Diego and San Antonio. Petco sells pet food, products, and services, as well as certain types of live small animals.