WordPress (WordPress.org) is a free and open-source content management system (CMS) written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system, referred to within WordPress as Themes. WordPress was originally created as a blog-publishing system but has evolved to support other types of web content including more traditional mailing lists and forums, media galleries, membership sites, learning management systems (LMS) and online stores.
The website wordpress.org advertises some hosting companies which are not trade-free: https://wordpress.org/download/
Just 4 blocks for their website that has at least 1 tracker.
I use Wordpress a while now and it is completely trade-free, since you don’t have to pay any money, nor data, nor anything else. Some plugins or themes for Wordpress are not trade-free! But Wordpress itself is. Also, don’t confuse it with wordpress.com – that’s different. You can create a website on wordpress.com for “free”, but not trade-free. You can only choose a domain with yourdomain.wordpress.com and you have a lot limitations: https://wordpress.com/pricing/?ref=create-blog-lp therefore they want to sell you their personal, premium, business or commercial plan. So keep in mind, wordpress.com is not trade-free, but wordpress.org, the software, the content management system is trade-free.
Anyone can download Wordpress and install locally or on their own server. And tweak it any way they want to. All, trade-free.