I think you should consider mentioning some of the options available for the open source version of WordPress (WordPress.org). The most notable option we have now I think is the page builder plugin Elementor from Pojo. The free version has tons of widgets one could use to build a responsive website for free without touching a line of code. I believe the space in WordPress.org is no longer for just for Developers. Anyone in the beginner stage can build sites on WordPress with much more flexibility than anything like WIX could ever offer since they are a closed platform. Mathew from LaunchParty has provided an amazing FREE course that will guide you how to build amazing sites with WordPress and Elementor. And he even provides you with amazing Elementor templates that you can use. Lastly, please note that not every thing that is meant to be sustainable is truly free. Last time I checked, in order to have a proper website with WIX, it was only free when you use their domain extension. If you ever wanted to remove WIX from the domain name, then you would have to pay for that. On the other hand, WordPress.org is open source, meaning free. But hosting is not, neither is your own domain name. There are many WordPress plugins that are worth paying for as well, including Elementor as well as others that will handle other important features such security.
Not all software is specifically supported by name by web hosts, but you can still use it if the requirements are met. You can use the Scripting and Languages filter to find hosts that support the technology that your desired app runs on. Any other questions you may have on how to narrow down your search as you compare web hosting providers, be sure to let us know!
How it works is that you rent hosting space from someone like HostGator, and then you host third-party sites on your rented space. You’re kind of like a middleman. HostGator does all the hard work and takes all the risk from a server point of view. This can work really well if you’re looking to diversify and are already in the web-tech sphere, say as an app developer or website builder.