CMS (site management software)
There are a lot of free engines, but often their basic configuration does not allow to run an online store normally. Additional modules come to the rescue, but their functionality is not good enough, and the interface, as a rule, is inconvenient even for a seasoned administrator. For using a paid platform, which will ensure the stability of the resource, you will have to regularly “unfasten” the money.
If you want the portal to do a good job, but at the same time do not want to constantly pay for the engine, there is an alternative - copyright CMS of IT companies, which are sharpened specifically for e-commerce.
An online store — is a place where financial transactions, personal customer data and other important content are stored. Therefore, it must calmly withstand any network attacks (in which case) and not be infected with viruses. Only a carefully designed CMS can provide such protection. Before buying a ready-made online store, check what level of protection the seller company guarantees.