Open-source e-commerce softwares provide entire web store application or part of a web store like shopping cart. These softwares have features such as shopping cart functionality and product catalogs that enable store owners to set up, run and maintain online stores. Typically, Open-source e-commerce softwares are available for free, however, other fees may exist for varying types of memberships. Small size companies where transaction volumes are low adopt open-source software and it has been a mainstream activity for almost more than five years. But many large enterprises are wary of adopting open-source e-commerce for large-scale and midsize e-commercesites, because of concerns over reliability in supporting large transaction volumes. Scalability and security are the major bottleneck for large-scale transactional sites.