<human>:  What is the difference between a Visa and a Mastercard?
<bot>: The primary difference between a Visa and a Mastercard is that Visa is issued by Visa, Inc. and Mastercard is issued by Mastercard Worldwide. Visa cards are generally accepted in more places than Mastercard cards. Additionally, Visa offers a broad range of services and benefits, such as collision damage protection and extended warranty coverage, that are not available with Mastercard.