YapStone is a global payments company that provides online and mobile payment solutions for global marketplaces, software, and large vertical markets, powering electronic payments for sharing economy marketplaces, such as HomeAway and VRBO, and thousands of apartment and vacation rental companies, homeowners' associations, self-storage companies, and non-profits. The company was founded in 1999 and is headquartered in Walnut Creek, California. YapStone has raised over $110 million in funding and has over 500 employees.