CardSpring was a San Francisco-based e-commerce company that provided payment infrastructure software and APIs for developers, enabling them to create merchant services linked to credit card payments. The company focused on digital payment solutions that streamlined transaction processes for businesses and consumers, and was later acquired by Twitter.

CardSpring was a San Francisco-based e-commerce company that provided payment infrastructure software and APIs for developers, enabling them to create merchant services linked to credit card payments. The company focused on digital payment solutions that streamlined transaction processes for businesses and consumers, and was later acquired by Twitter.