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Mimic Guard is an anti-spam plugin for WordPress mail and contact forms. It uses dynamic honeypots, submission time monitoring, and integration with major form plugins to reduce automated bot submissions.
<ul>
<li>Honeypot — Detects bots that fill hidden form fields</li>
<li>Time check — Flags submissions that are unrealistically fast after the form is shown</li>
<li>Form integration — Works with WPForms, Contact Form 7, comments, and more</li>
<li>Page caching — Optional AJAX honeypot injection when HTML is cached</li>
<li>Privacy — Optional IP anonymization when logging events</li>
</ul>
Configure minimum submission time, token lifetime, log list size, and more from the admin screens.

Mimic Guard

Block spam submissions with honeypot fields and submission timing checks.

wpdebuglog

This is a highly powerful contact form 7 anti-spam add-on. It is introducing a new hidden field and check that one value is correct or not.
<h4>Features of Contact Form 7 Honeypot Plus</h4>
<ul>
<li>No configuration is needed</li>
<li>Better anti-spam functionality</li>
<li>No need any ugly captcha.</li>
</ul>

Honeypot Plus for Contact Form 7

Nice plugin

Honeypot Plus for Contact Form 7 - Adds honeypot plus anti-spam functionality to Contact Form 7 forms.

Mimic Guard vs Honeypot Plus for Contact Form 7