tyfdesign

When activated, this plugin: 
1. Closes comments and pings on all existing public content (posts, pages, and custom post types). 
2. Sets WordPress defaults to disallow new comments and pings on all future content. 
3. Ensures that newly created or updated posts remain closed to comments. 
4. Hides the default Comments menu in the admin sidebar when enabled. 
5. Provides a simple Settings page with a single Activate / Deactivate button to toggle behavior.
When deactivated, the plugin restores the default WordPress discussion settings without reopening previously closed comments.
Created by TYF Design.

Do Not Allow Comments Everywhere

A lightweight plugin that globally disables comments and pings across all WordPress content - past and future.

DaisyPlugins

Daisy Comments completely disables all comment functionality on your WordPress site, including:
<ul>
<li>Disables comment forms on all posts/pages</li>
<li>Hides all existing comments from display</li>
<li>Removes comment feeds</li>
<li>Cleans up admin area by removing comment-related menus and widgets</li>
<li>Provides beautiful settings panel with toggle control</li>
</ul>

Daisy Comments — Disable Comments & Stop Spam

Disables comment functionality and hides all existing comments from your WordPress website.

Do Not Allow Comments Everywhere vs Daisy Comments — Disable Comments & Stop Spam