what’s the difference between ups and usps? UPS and USPS are both prominent shipping carriers, but they offer different services. USPS is a government-run postal service that provides affordable mail and package delivery, primarily within the United States. UPS, a private company, offers more specialized shipping services, including international shipping, ground delivery, and express services. While USPS is known for lower prices, UPS often offers faster and more reliable delivery options, especially for larger or heavier packages. Businesses should compare both carriers to find the best fit for their needs.