Really Simple CAPTCHA
Really Simple CAPTCHA is a CAPTCHA module intended to be called from other plugins. It is originally created for my Contact Form 7 plugin.
4.2(129 reviews)
·300K+ active installs·Updated 1 year agoAs of April 2026, Really Simple CAPTCHA is a WordPress captcha plugin with 300K+ active installations and a 4.2/5 rating from 129 reviews. It has been downloaded 9.3M+ times in total. Requires WordPress 6.6+ and PHP 7.4+. Available on WordPress.org since 2009. Last updated 1 year ago — may have compatibility concerns. Download volume is stable this week. Top alternative: SiteGuard WP Plugin.
4.2/5129 reviews
300K+active installs
9.3M+total downloads
17 yearssince 2009
Overview
Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for Contact Form 7, however, you can use it with your own plugin.
Note: This product is “really simple” as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions.
How does it work?
Really Simple CAPTCHA does not use PHP “Sessions” for storing states, unlike many other PHP CAPTCHA solutions, but stores them as temporary files. This allows you to embed it into WordPress without worrying about conflicts.
When you generate a CAPTCHA, Really Simple CAPTCHA creates two files for it; one is an image file of CAPTCHA, and the other is a text file which stores the correct answer to the CAPTCHA.
The two files…
Screenshots
Ratings & Reviews
4.2129 reviews
5 ★
90
4 ★
15
3 ★
1
2 ★
4
1 ★
19
Recent Reviews
Prima, funktioniert auch auf meiner WP 6.9 einwandfrei
by afudo1tlg·2 months ago
Super simple! Einfach in Contact Form 7 Version 6.1.4 einzubinden. Danke.
Meine WordPress Installation: Version 6.9.
PHP Version 8.4.15
Bad
by Diego Soto·6 months ago·1 reply
I’m sorry to have to give this a bad rating. The amount of spam with Contact Form 7 was enormous. I had to remove it.
Works great with Gravity Forms in 2024!
by Maxcom·1 year ago
Nothing but positives. We added this to our Gravity Form in order to obtain the dynamic math captcha. One can create a simple math captcha in GF but not dynamically changing for each form load insofar as I can determine. And GF google captcha Ver 3 is a pain with the need for google api keys.
So we added this plugin and it was very easy – add the captcha field to the form, select “math” in the settings for the field and done!
We find that Gravity Forms Zero Spam plugin was helping to deter spam entries but it with this captcha is 100% so far for spam prevention.
Thank you Takayuki Miyoshi!
Good Simple Banner
by nicolasvsedeco·2 years ago
Helo, very simple banner for cookies but there is a little bug. The banner Cookies are shown in Widgets page.
- This topic was modified 2 years, 5 months ago by nicolasvsedeco.
Bad and not work to stabilite
by gurcantet·2 years ago
spam is continue to come…
Download Trends
Today: 332Yesterday: 551This week: 3KPeriod total: 251K
Compatibility
| WordPress | 6.6+ requiredTested up to 6.7.5 |
| PHP | 7.4+ required |
Version Adoption
v2.4
48.6%
v2.0
15.3%
v2.1
12.5%
v2.3
7.3%
v2.2
5.5%
Top Alternatives to Really Simple CAPTCHA
Frequently Asked Questions
Changelog
2.4
- Bumps up the minimum required WordPress version to 6.6.
- Introduces the ReallySimpleCaptcha_Filesystem trait.
- Uses SHA-256 as the hash algorithm.
- Uses
wp_rand()instead ofmt_rand().
Contributors
Plugin data sourced from WordPress.org. Analysis and metrics by PluginSift.