MikesPickz

MP Spam Be Gone is the simplest, most effective Spam blocker without difficult CAPTCHA responses needed by the user. This plugin was inspired by some of the best Anti-Spam plugins available on WordPress.
Inspirations: 
Spam Free WordPress by Todd Lahman, LLC 
Growmap Anti Spambot Plugin by Andy Bailey 
Simple Trackback Validation with Topsy Blocker by Tobias Koelligan
This plugin has aspects from all of the above mentioned plugins to form the most complete and dead simple Anti Spam plugin on WordPress. This plugin doesn’t write anything to your database while preventing comment spam and trackback spam.
From Growmap Anti Spambot Plugin, I used the concept of having a checkbox display to the user in order to prevent automated Spam. To me this is the best way (and least intrusive) to completely prevent automated spam from ever even being written to the database in the spam que. It is physically impossible to get a false positive, since you either checked the button or not. The flaw with this plugin is that it does not work with Javascript disabled.
To combat that flaw, I use the copy and paste password fields from the Spam Free WordPress plugin. These fields are in a <code><noscript></code> tag, and only appear if Javascript is disabled. Unlike, the Spam Free WordPress plugin, these passwords are generated on the fly and never stored in the database.
These plugins primarily stop comment spam. In order to stop trackback spam, I added the IP address check, URL check, and Topsy check functions from Simple Trackback Validation with Topsy Blocker. If a trackback is identified as spam because of the IP address or Topsy, it is deleted and never written to the database. If a trackback is identified as spam because of the URL, it is marked as spam and sent to the Spam que. The reason that these are not automatically deleted, is because it is possible that the referring page is using a shortlink and therefore the full URL would not appear on the page in the first place.
When combined, this plugin will stop all automated spam and trackbacks.
It is intended to replace the above plugins.
You can’t find a plugin simpler than this – set it and forget it. No options = no modifications to the database.

MP Spam Be Gone

MP Spam Be Gone is the simplest, most effective Spam blocker.

Martín Gómez

RaiolaNetworks

Honeypot Anti-Spam stops comment spam in WordPress using the honeypot technique – with no captcha, no puzzles and nothing for your visitors to solve.
Spam bots automatically fill in a hidden field that real visitors never see. The moment they do, the comment is flagged as spam. The result: cleaner comments, zero friction for genuine users and no annoying CAPTCHA.
<h4>Why Honeypot Anti-Spam?</h4>
<ul>
<li>No captcha – completely invisible to visitors, nothing to type or click.</li>
<li>Zero configuration – install, activate, done. There are no settings to touch.</li>
<li>Lightweight and fast – a tiny script with no bloat and no impact on page speed.</li>
<li>Privacy friendly – no external services, no tracking, no data leaves your site.</li>
<li>Native WordPress comments – works out of the box with the standard comment form.</li>
</ul>
<h4>How the honeypot technique works</h4>
The honeypot antispam technique adds a hidden field to your comment form via JavaScript. A legitimate visitor never sees this field and therefore never fills it in. Spam bots, however, detect it and fill it in, so the comment or submission is immediately classified as spam.
Honeypot Anti-Spam has NO options and NO configuration. To get it working you only have to install and activate it. Nothing else.
<ul>
<li><a href="https://raiolanetworks.com/blog/anti-spam-wordpress/" title="Information and support" rel="nofollow ugc">More information and support</a></li>
</ul>
<h3>Bundled by default with</h3>
Raiola Networks WordPress hosting service.

Honeypot Anti-Spam

La mejor alternativa al antiguo plugin anti-spam!

El nuevo Anti-spam

Elección segura contra el SPAM en las páginas web.

Mi (nuevo) plugin de referencia anti-spam


Forget about all the other antispam plugins out there. They are all unnecessarily big. This is just what you need, a simple tool to block the spam for comments.


Just what you need

Stop comment spam in WordPress with the honeypot technique. No captcha, no setup, lightweight and invisible to your visitors.

MP Spam Be Gone vs Honeypot Anti-Spam