What are some alternatives?
When comparing iRefers and Shopify, you can also consider the following products
Hotmart - Hotmart is a free and complete platform to host and sell online courses.
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Adwalnut - Adwalnut is a SaaS based affiliate tracking and reporting software provides conversions tracking, campaign management & reporting software.
Magento - Magento is the eCommerce software and platform trusted by the world's leading brands. Grow your online business with Magento.
Commission Junction - CJ Affiliate by Conversant (formerly Commission Junction)
BigCommerce - BigCommerce provides ecommerce software solutions and shopping cart software for online businesses. Try it free and start selling your products online today!