ClassPass is a monthly subscription service providing access to fitness classes in various cities around the world. The company was founded in 2013 by Payal Kadakia and has since grown to offer classes in over 30 countries. ClassPass partners with studios and gyms to offer a variety of classes, including yoga, cycling, strength training, and more. Users can book classes through the ClassPass app and website, and can attend classes at any of the partner studios. The company has raised over $500 million in funding and has been recognized as one of the fastest-growing companies in the US.