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Skt NURCaptcha
NURCaptcha inserts a reCAPTCHA on the Register Form of your site to protect it against spambots.
The facts
- Rating
- 4.5★ from 8
- Active installs
- 100+
- Price
- Free
- Last updated
- 30 Jul 2026
- Added
- Sep 2011
- Requires WP
- 5.0
- Tested up to
- WP 6.1.12
- Downloads
- 27,471
Our analysis
AI-assistedSkt NURCaptcha is a WordPress plugin designed to enhance user registration security by preventing spam bots from accessing your site. It utilises Google’s reCAPTCHA to verify users during the registration process and can also protect the login form. The plugin logs blocked registration and login attempts, providing insight into attempted breaches.
This plugin is suitable for WordPress site owners who want to allow free user registrations while ensuring that spam bots are kept at bay. It is particularly useful for sites that experience a high volume of registration attempts or those using WordPress Multisite and BuddyPress.
Best for: WordPress site owners seeking to secure user registration against spam bots.
What it does well
- ✓Uses Google reCAPTCHA for spam protection
- ✓Logs blocked registration and login attempts
- ✓Compatible with WordPress Multisite and BuddyPress
- ✓Easy to install without slowing down the site
- ✓Queries antispam databases for extra security
Where it falls short
- •Logfile figures may not reflect all blocked attempts
- •Limited feature information provided
Verdict
Skt NURCaptcha offers a straightforward solution for enhancing registration security on WordPress sites, though its logging capabilities may not capture all spam attempts.
From the developer
Carlos E. G. Barbosa's own description of Skt NURCaptcha, lightly tidied.
NURCaptcha stands for New User Register Captcha. It has been designed for anyone who wishes to allow free registration of new users for a WP site, but want to keep bots outside. It uses Google’s reCAPTCHA tools to give your site an extra protection against those spammer bots, adding security to the WP Register Form. With Skt NURCaptcha you may use a reCAPTCHA on your login form, also.
Skt NURCaptcha is easy to install and doesn’t slow down your site. It is called into action just at the moment the “Register for This Site” form is requested. It prompts users with a checkbox they click on to prove they are not robots, and creates a challenge whenever needed, and checks the response given. If it is not valid, new user registration fails. If the response is valid, NURCaptcha leaves the scene and your site runs as if it was not there.
Skt NURCaptcha adds (from Version 3 on) extra security by querying trustable antispam databases for known ip, username and email of spammers, so you get rid of them even if they break the reCaptcha challenge by solving it as real persons. From version 3.4 on you can enable login form protection, also, as an extra fence against brute force attacks.
NURCaptcha also shows you each blocked attemptive. Log data may be toggled for you to see info on the attemptives blocked by the plugin. It shows date/time of trials, as well as usernames and e-mail addresses of those who failed registration (or login, if enabled) and were kept outside. Please note that attemptives in which the spambot suspends its attack when confronted by the reCAPTCHA challenge can not be logged. So logfile figures will never reflect the whole achievements of the plugin in securing your site.
Works smoothly with WP Multisites (Network) and BuddyPress.
Skt-NURCaptcha home site: https://skt-nurcaptcha.sanskritforum.org/.
Languages included.
- Dutch nl_NL – by SalviJansen.
- Frech fr_FR – by ChezMat.
Privacy Disclaimer
This plugin uses Google reCAPTCHA which uses cookies and collects usage data. Its privacy policy is under Google’s Privacy Policy.
NURCaptcha collects and records in a log table: IP, username and email address of each blocked register or login attemptive.
Tagged as
platform
WordPress Multisite
quality
Security
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