sightfactory

The Restrict RSS Feeds plugin gives you several useful options for managing your feed such as:
<ol>
<li>Switching off all RSS feeds in your WordPress installation</li>
<li>Restricting access to authorized users by requiring a password for access</li>
<li>Removing descriptions and excerpts from the feed</li>
<li>Removing author names from the feed</li>
</ol>
RSS is a type of web feed that allows your readers to automatically get new content in email newsletters and RSS feed readers.
RSS feeds can be useful for your website when running a blog but are unnecessary if using WordPress as a basic website builder or ecommerce site. Some blog posts may also be gated content and be intended to be visible by authorized users only.

VisualWP Restrict RSS Feeds

A quick and easy solution to automatically disable all RSS feeds or restrict rss access with a custom password.

Galaxy Weblinks

Disable Feeds WP is a WordPress plugin to disable all RSS/Atom/RDF WordPress feeds on your website/blog. It is very useful if you use WordPress purely as a content management system (and not for blogging). All requests for feeds will be redirected to the corresponding HTML content.
There are a couple of options to tweak the plugin’s behavior – go to <code>Settings -> Reading</code> to see them.
Here’s a link to the documentation for the plugin. This will help you learn more about its features and how to use it. 
<a href="https://wp-plugins.galaxyweblinks.com/wp-plugins/disable-feeds-wp/doc/" rel="nofollow ugc">Documentation</a>
For any feedback or queries regarding this plugin, please contact our <a href="https://wp-plugins.galaxyweblinks.com/contact/" rel="nofollow ugc">Support team</a>.

Disable Feeds WP

Disables all RSS/Atom/RDF feeds on your WordPress site.

VisualWP Restrict RSS Feeds vs Disable Feeds WP