Luigi Cavalieri

RedBrick is able to block most of the automated spam comments a WordPress blog receives daily.
It is based upon a score system that ensures spam comments are blocked as soon as possible, so as to minimise the number of checks each comment must go through. When in doubt, RedBrick always holds the comment in the moderation queue. Comments identified as spam, however, never reach the database.
As a last resource in discerning the kind of comment under examination, RedBrick takes account also of the comment author’s history.
The plugin is designed to work on low-to-medium traffic blogs.

RedBrick

Simple anti-spam plugin for WordPress blogs.

Ajay

WebberZone

Spammers target old posts in a hope that you won’t notice the comments on them. Why not stop them in their tracks by just shutting off comments and pingbacks? <a href="https://webberzone.com/plugins/autoclose/" rel="nofollow ugc">Auto-Close Comments, Pingbacks and Trackbacks</a> lets you automatically close comments, pingbacks and trackbacks on your posts, pages and custom post types.
You can also choose to keep comments, pingbacks, or trackbacks open on certain posts, pages or custom post types. Just enter a comma-separated list of post IDs in the Settings page.
An extra feature is the ability to delete post revisions or limit their number.
Found a bug or want to contribute? PRs and issues welcome on <a href="https://github.com/WebberZone/autoclose" rel="nofollow ugc">GitHub</a>. For help, use the <a href="https://wordpress.org/support/plugin/autoclose" rel="ugc">support forum</a> or <a href="https://webberzone.com/support/" rel="nofollow ugc">premium support</a>.
<h3>Key Features</h3>
<ul>
<li>Close (or open) comments on posts, pages, attachments and even Custom Post Types</li>
<li>Close (or open) pingbacks and trackbacks as well across all post types. You can also choose to delete them</li>
<li>Schedule a cron job to automatically close comments, pingbacks and trackbacks daily</li>
<li>Delete all post revisions or limit the number of revisions by post type</li>
<li>Exclude specific post IDs from auto-close</li>
<li>Exclude posts in specific categories, tags, or any taxonomy term from auto-close</li>
<li>Reopen comments automatically when a post is updated, with a configurable open window</li>
<li>Receive an email summary after each scheduled cron run showing what was closed or deleted</li>
<li>Block self-pings and custom ping URLs</li>
<li>Schedule the closing of comments, pingbacks, and trackbacks for the current post</li>
</ul>

Auto-Close Comments, Pingbacks and Trackbacks

Auto-Close keeps your site clean by automatically closing comments, pingbacks, and trackbacks—so you can focus on content, not cleanup.

RedBrick vs Auto-Close Comments, Pingbacks and Trackbacks