The structure and performance of content management systems are analyzes. Over the past three decades, sites have evolved from a conventional way of transmitting hypertext to multi-component software that serves thousands of users simultaneously and allows different types of Internet resources to exist on the same platform. For easy data manipulation in this case use content management systems content management systems. The four most popular in many countries content management systems: WordPress, OpenCart, Joomla, Drupal are compared in the article using ten key features : platform; technology; database management systems used in the design; developer; request processing speed; cost; reliability; target audience; ease of use; availability of translation of the administrative panel into Ukrainian. As research has shown, there is no completely universal content management system. Every of the existing software for creating a web resource is designed to solve a specific range of tasks. The method of building a content management systems is based on classical methods of Web-site development, namely it is a hybrid of manual HTML development, site development software, tool systems, frameworks. Free content management systems are open source. Free systems that have appeared on the market for more than 10 years ago are not inferior to paid, to newer, options in terms of security and volume of functional content. This state of the problem is due to the fact that the development of plug-ins and add-ons can be engaged not only in system developers, but also third-party developers. The structure of the content management system is based on the use of the modular principle. This makes the content management system flexible, easy for both the user and the developer to interact with, and allows you to expand the range of one module by installing another. WordPress is a content management system that has a more sophisticated architecture that reflects performance, intuitively clear administrative panel and, finally, has more advantages over analogues