The ACA Marketplace, also known as the health insurance marketplace, is an online platform where individuals and small businesses can shop for health insurance plans that meet the requirements of the Affordable Care Act (ACA). The marketplace allows consumers to compare different health insurance plans offered by insurance companies and choose the one that best fits their needs and budget. Consumers can also find out if they qualify for financial assistance to help pay for their health insurance premiums or out-of-pocket costs. The ACA marketplace is maintained by the federal government or state governments, depending on the state.