If you are keen to provide your users kind of a tracking free environment, you would have to remove
Google Recaptcha and other cloud based Captcha solutions from your WordPress installation.
PS PHPCaptcha WP does not use any remote resources. This makes it fully GDPR compliant without any need to mention it
To generate the image this plugin does not need to use the WordPress database and therefore IO of the database is very low.
This very important if you run a site with high traffic.
* WordPress up and running
* PHP5 or PHP7 installed
* PHP-GD installed and activated
* uses PHP sessions
For setup of the Plugin just follow these 3 easy steps.
No screenshots provided