The Zalando Partner Program is the channel through which brands and third-party sellers offer their products on the Zalando platform in several European countries. Zalando handles customer service and local payment methods, while the partner sets its own prices, assortment and logistics method. It is a commercial service used through an online partner portal, not software the partner installs.
Zalando SE is headquartered in Berlin and registered at the Charlottenburg local court. Its imprint names no majority shareholder, and no parent company outside the EU has been identified. The privacy policy names technology providers such as Amazon Web Services and Salesforce without stating where they process data, and it mentions recipients outside the EU, including a US push-notification provider. For a European seller this is a German platform, and the data locations of each provider should be checked.