The ecommerce industry is highly developed, but after COVID-19 it has increased its position even more. The industry consists of huge corporations as well as a large number of small-scale stores. Each of these stores requires a system on which to operate. One popular system for online stores is WooCommerce. This study analyzed this system in terms of popularity, security, usability, among others. Its performance under load was also checked. A test for 4 WooCommerce configurations for different sets of parameters (RAM, processor) was conducted to check the maximum number of users which CMS can handle.