Pippin Williamson

Modifies the Empty Spam action in WordPress to process the spam deletion in batches, allowing you to delete thousands or even hundreds of thousands of spam comments at once without killing your server.
Have you found a bug or have a suggestion or improvement you’d like to submit? This plugin is available on <a href="https://github.com/pippinsplugins/batch-comment-spam-deletion" rel="nofollow ugc">Github</a> and pull requests are welcome!

Batch Comment Spam Deletion

Modifies the Empty Spam action in WordPress to process the spam deletion in batches instead of all at once.

Anass Rahou

Comment Limiter helps site owners control the length of comments submitted on their WordPress site.
With this plugin, you can define minimum and maximum character limits for comments, helping reduce low-effort comments, spam-like submissions, and overly long responses.
This is useful for blogs, communities, review sections, and any site where comment quality matters.Comment Limiter allows you to setup a limit of maximum and minimum characters allowed in each comment on your website posts, with the following features:
<ul>
<li>An extremely easy-to-use plugin.</li>
<li>Setup a maximum and minimum number of characters.</li>
<li>Enable or disable administrators to write a free comment, without restriction.</li>
<li>Extremely easy to delete. Don’t like the plugin? You can remove it, without leaving any trace.</li>
</ul>
Pull requests are welcome on <a href="https://github.com/ranss/comment-limiter" rel="nofollow ugc">Github</a>.
<h3></h3>
Tags: comment, length, limit, maximum, comment length, minimum comment, comment characters 
Requires at least: 6.0 
Tested up to: 6.6.2 
Requires PHP: 7.4 
Stable tag: 2.3.0 
License: GPLv2 or later 
License URI: http://www.gnu.org/licenses/gpl-2.0.html
<h3>Support</h3>
For questions, feature requests, and support concerning the Comment Limiter plugin, please refer to <a href="https://github.com/ranss/comment-limiter" rel="nofollow ugc">Github</a>.

Comment Limiter

Limit comment length by setting minimum and maximum character rules for WordPress comments.

Batch Comment Spam Deletion vs Comment Limiter