Stripe launched in Australia and began testing in three Scandinavian countries on Monday, as the three-year-old payments startup backed by a trio of PayPal co-founders slowly enlarges its global footprint. Its latest international expansion came after it struck a rare deal with Chinese payments service Alipay, an affiliate of Alibaba Group Holding Inc, to allow Chinese buyers to pay for purchases on the U.S. service. “Stripe’s mission is to grow Internet commerce by providing everything an online business needs to accept payments,” John Collison, co-founder and president of Stripe, said in a blogpost on Monday. Stripe now operates in several countries including Canada, Britain and Ireland, and is beta-testing in European countries such as Finland and Switzerland.