Spree is one of the 15 best free open source ecommerce platforms available. It is very essential to choose the appropriate one as per one's needs and desires. Each ecommerce platform has its own relative pros and cons.
Spree stands out as an open source platform for Ruby on Rails. This could be the tool for you if you are looking for something to make you stand out of your competitors in the market.
One of the positive things about this is that there is support for over 50 payment gateways.
Merchants on the web don't have to invest a lot of time or effort when it comes to Spree because it has single page checkout and custom tax logic system.
Google Analytics is also built into the system.