elrata_

NOTE: I’m looking for a new maintainer. Please reach out to 
rodrigo@sdfg.com.ar if you are interested.
NOTE: I don’t have wordpress 5 installations to try this and plan to stop 
updating it. If this is a big issue for you, please let me know so I can 
consider to continue doing it. Also, let me know if you are willing to help with testing :).
This is a small modification of the wp-recaptcha plugin to make it work with 
BuddyPress. Currently uses recaptcha v2.
You only need this plugin if you use Buddypress with wordpress and want a 
recaptcha at the registration page.
It is always rebased on top of wp-recaptcha. See 
https://github.com/rata/wp-recaptcha-bp for more info
What is reCAPTCHA?
reCAPTCHA is a free CAPTCHA service that protects your site against spam, malicious registrations and other forms of attacks where computers try to disguise themselves as a human; a CAPTCHA is a Completely Automated Public Turing test to tell Computers and Human Apart. reCAPTCHA comes in the form of a widget that you can easily add to your blog, forum, registration form, etc.
In addition to protecting your site, reCAPTCHA also helps us digitize old books and newspapers, transcribe street numbers and solve hard AI problems. <a href="http://www.google.com/recaptcha" rel="nofollow ugc">Learn how reCAPTCHA works</a> and join our <a href="https://groups.google.com/forum/#!forum/recaptcha" rel="nofollow ugc">forum</a>.
<h3>Requirements</h3>
<ul>
<li>You need the reCAPTCHA keys <a href="https://www.google.com/recaptcha/admin#whyrecaptcha" rel="nofollow ugc">here</a>.</li>
<li>Your theme must have a <code>do_action('comment_form', $post->ID);</code> call right before the end of your form (Right before the closing form tag). Most themes do.</li>
</ul>

WP-reCAPTCHA-bp

Integrates reCAPTCHA anti-spam methods with WordPress sites using BuddyPress plugin, including comment and registration spam protection.

sightfactory

Increase security and protect against bots, spammers and hackers. Cloudflare Turnstile is a friendly, free CAPTCHA replacement that delivers a frustration-free experience to website visitors.
<h4>USE OF 3RD PARTY SERVICES</h4>
VisualWP Cloudflare Turnstile relies on <a href="https://www.cloudflare.com/products/turnstile/" rel="nofollow ugc">Cloudflare Turnstile</a>, a 3rd party API that connects to Cloudflare servers to generate the anti-spam field that appears on the WordPress login form, register form, comment form and any Ninja Form that the field is manually added to. The anti-spam check will not work if website traffic to Cloudflare servers is blocked or impeded. Cloudflare has to look at some session data (like headers, user agent, and browser characteristics) to validate users without challenging them. Learn more by visiting Cloudflare <a href="https://www.cloudflare.com/website-terms/" rel="nofollow ugc">Terms of Service</a> and <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Privacy Policy</a>
<a href="https://www.cloudflare.com/products/turnstile/" rel="nofollow ugc">Login or Register on Cloudflare</a> to generate your site key, secret key and setup approved domains. Customers are limited to 1 million siteverify calls per month during the open beta or can upgrade to <a href="https://developers.cloudflare.com/bots/get-started/bm-subscription/" rel="nofollow ugc">Enterprise Bot Management</a> via Cloudflare website for cases exceeding the free tier.
<h4>CLOUDFLARE TERMS OF USE AND PRIVACY POLICY</h4>
Terms of Service: <a href="https://www.cloudflare.com/website-terms/" rel="nofollow ugc">https://www.cloudflare.com/website-terms/</a> 
Privacy Policy: <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">https://www.cloudflare.com/privacypolicy/</a>

VisualWP Cloudflare Turnstile – Easy Anti-Spam alternative to CAPTCHA

Increase security and protect against bots, spammers and hackers with Cloudflare Turnstile, a friendly, free CAPTCHA replacement

WP-reCAPTCHA-bp vs VisualWP Cloudflare Turnstile – Easy Anti-Spam alternative to CAPTCHA