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.


78 reviews
Average Rating
4.2 out of 5 stars
Good one
By , for WP 3.8.1

I'd pose a 5 start obviously, but in some cases it misses some spammer account - but that's silly - it's actually a doing a nice work in both registration and login. Excellent one. Would like to recommend for any site. :)

Just what I needed - Thanks! :)
By ,

donation made.

By , for WP 3.6.1


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 :)

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