Paymill is described as 'PAYMILL’s developer friendly REST API lets you accept credit and debit card payments directly in your website and mobile application. Available across Europe, online businesses are able to accept online payments globally, enabling them to scale internationally from the get-go' and is a payment processing service in the business & commerce category. There are more than 25 alternatives to Paymill, not only websites but also apps for a variety of platforms, including SaaS, Android, iPhone and Self-Hosted apps. The best Paymill alternative is PayPal. It's not free, so if you're looking for a free alternative, you could try PayPal or GNU Taler. Other great sites and apps similar to Paymill are Payoneer, Authorize.net, Deal.io and SuperPay.