Before upgrading to HubSpot, I must tell you that WordPress is an amazing CMS. WordPress offers a great flexibility to deal with various functionalities through the plugins developed by the open source community. The WordPress plugins help to integrate different marketing applications with the website. On the contrary, the plugins used in the website need to be updated as the version of the WordPress itself, which requires expert team members. If you are not able to do that, you leave your website vulnerable to hackers.