Brandon Fenning

Since the vast majority of WordPress spam is automated in nature, the goal of BotBlocker is to block comment spam bots and not hinder users. This is accomplished through the use of honeypot technology, which tricks the spambot into identifying itself by performing actions that a human could not.
BotBlocker’s features include:
<ol>
<li>Works out of the box to block spam</li>
<li>Automatically stops spam-bots from commenting</li>
<li>Zero hindrance to users: no CAPTCHAS, math questions, passwords or extra input required</li>
<li>Zero false positives and ignores registered users</li>
<li>Can be configured to completely block spam-bots or flag comments as spam</li>
<li>Spam detection messages can be easily adjusted</li>
<li>No javascript or cookies required</li>
<li>Hooks into <code>wp-comments-post.php</code> to prevent spam-bots from directly submitting spam comments</li>
<li>Should work fine with most customized comment forms</li>
<li>No API keys required</li>
</ol>
http://www.lform.com/botblocker/ for more information.
Plugin by <a href="http://www.lform.com/" rel="nofollow ugc">LFORM, a web design company</a> in New Jersey.

BotBlocker

Kills spam-bots, leaves humans standing. No CAPTCHAS, no math questions, no passwords, just spam blocking that stops spam-bots dead in their tracks.

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.

BotBlocker vs Honeypot Anti-Spam