Plugin Reviews


Adds CAPTCHA anti-spam methods to WordPress on the forms for comments, registration, lost password, login, or all. For WP, WPMU, and BuddyPress.


95 reviews
Average Rating
4.2 out of 5 stars
By ,

very good antispam

Better than reCaptca
By , for WP 3.8

When I use si Captcha I was getting several dozens of registered user per day.
I used another plugin (s2member) that requires (if you use there pro forms and use their s2member pro) to use reCaptcha.

My registrations have dropped to two per day. Even I get locked out because of too many failed attempt to login to my own site.

I wish s2member would switch to si Captcha on the preforms.. anyone that would say otherwise may be loosing a ton of registrants and money.

By , for WP 3.5.1

My old Captcha plug-in broke so I installed this one as an alternative. Annoyingly I went from getting a dozen or so spam registrations per day to getting hundreds. This plug-in attracted spammers rather than kept them out - almost as though that was the purpose it was designed for.

Far from me making a donation to the developers, I'm expecting them to chuck me a few bucks to compensate me for the time it's going to take to delete all these spammers I've now got in my MailChimp database.

Worked for a while but not anymore
By , for WP 3.5

Worked for a while but not anymore, now a robot creates ~10 users a day :(

Doesn't prevent spammer to register - Broken
By , for WP 3.7.1

The captcha can be broken by robots that register to my wordpress installation and try to publish articles.

Ich liebe es - i love it
By , for WP 3.7.1

Ich habe es auf 5 oder 6 Seiten laufen - ohne Probleme
It works on 5 or 6 of my site- without any problems

A good CAPTCA plugin
By ,

Makes a necessary evil easy and painless :)

By , for WP 3.7.1

awesome! :D

By , for WP 3.7.1

Works, easy to use if you want to use it on all your comments, forms, etc. I only use it for my login form as I sue another for comments and such. But it was great to have the choice to just use it for my login. With several bloggers having access I need to know there is another level of security besides them using a too simplistic password.

Didn't really work for me
By , for WP 3.6.1

I installed the plugin, it runs on my website, but i still get about half a dozen spam comments a day :( off to try something else

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