nopCommerce is the best open-source eCommerce platform. nopCommerce is free, and it is the most popular ASP.NET Core shopping cart. nopCommerce architecture follows well-known software patterns and the best security practices. The source code is fully customizable. Pluggable and clear architecture makes it easy to develop custom functionality and follow any business requirements. Using the latest Microsoft technologies, nopCommerce provides high performance, stability, and security.