KeyCAPTCHA

<h4>Free Variants of Using WordPress CAPTCHA – KeyCAPTCHA</h4>
<ol>
<li>Anti-spam protection. Social advertising. Monetization through commercial ads.</li>
<li>Anti-spam protection. Monetization through commercial ads.</li>
<li>Anti-spam protection. Social advertising.</li>
<li>Anti-spam protection without any ads.</li>
</ol>
<h4>Social Features:</h4>
<p>You may support charity funds by enabling social advertising in our CAPTCHA.<br />
Also you can earn money by specifying social and commercial advertising shares in CAPTCHA on your website.</p>
<h4>KeyCAPTCHA Unique Technologies</h4>
<ul>
<li>Instead of guessing symbols, our WordPress CAPTCHA offers visitors to complete an easy interactive task.</li>
<li>If CAPTCHA hasn’t been solved correctly, page refreshing doesn’t take place that allows the user not to fill in the form repeatedly. It occurs since there is an initial checkup of CAPTCHAs in our CAPTCHA servers before sending a filled-in form to the protected web server.</li>
<li>Our CAPTCHA also can be used even if your hosting provider blocks all outgoing connections.</li>
</ul>
<h4>Effective Anti-Spam Protection</h4>
<ul>
<li>The geo-cluster is used to operate our CAPTCHA service. Our geo-cluster includes the servers located in diverse European data centers. Some servers are in the special DDoS stable data centers in Switzerland to ensure trouble-free 24x7x365 mode service operation.</li>
<li>Our CAPTCHA blocks spammers using anonymizers or anonymous HTPP proxies to distribute a hand spam.</li>
<li>There is no info of correct CAPTCHA solution in the visitor’s browser.</li>
<li>CAPTCHA verification is processed by the our CAPTCHA servers.</li>
<li>Data transferring between your web server, the visitor’s browser and our CAPTCHA servers is protected by a digital signature.</li>
<li>112 to 165 bit variable length password is used to generate a digital signature.</li>
<li>Our CAPTCHA is a code executable in the visitor’s browser. It is not a static image as used in typical CAPTCHAs.</li>
<li>Having received our CAPTCHA, it’s virtually impossible to transfer it to third parties in order to run any task what spammers also do bypassing typical CAPTCHAs.</li>
<li>Probability of guessing the answer by submitting a random solution is 1 to 30,000,000.</li>
<li>CAPTCHA-used images are transferred encryptedly.</li>
</ul>
<h4>Integration with WordPress</h4>
<p>Our CAPTCHA protects the following forms:</p>
<ul>
<li>Registration form</li>
<li>Comment form</li>
<li>Login form</li>
<li>Lost password form</li>
<li>Contact Form 7</li>
</ul>
<p>Compatibility and Features:</p>
<ul>
<li>Supports Trackbacks and Pingbacks</li>
<li>Our CAPTCHA is compatible with BuddyPress plugin</li>
<li>Our CAPTCHA supports two operating modes: Flash and HTML5. HTML5 CAPTCHA mode is used in most modern browsers, such as Mozilla FireFox, Google Chrome, Safari, and also used in iPhone and iPad. The Flash mode has been developed to be used in Internet Explorer and Opera. While loading, CAPTCHA identifies its operating mode depending on the visitor’s browser.</li>
</ul>
<h4>ATTENTION</h4>
<p>To install our WordPress CAPTCHA you should follow instructions in Installation tab. Otherwise the CAPTCHA won’t work correctly.</p>
<h4>KeyCAPTCHA Affiliate Program</h4>
<p>KeyCAPTCHA Affiliate Program allows publishers as well as any Internet user to collect incomes. For more information on The KeyCAPTCHA Affiliate Program, go to http://keycaptcha.wordpress.com/captcha-for-site-owners/affiliate-program/</p>
<h3>ATTENTION</h3>
<p>To install our CAPTCHA you have to follow instructions in Installation tab. Otherwise the CAPTCHA won’t work correctly.</p>
<h3>KeyCAPTCHA Translation</h3>
<ul>
<li>Our CAPTCHA is available in Armenian</li>
<li>Our CAPTCHA is available in Bulgarian</li>
<li>Our CAPTCHA is available in Chinese</li>
<li>Our CAPTCHA is available in Czech</li>
<li>Our CAPTCHA is available in Danish</li>
<li>Our CAPTCHA is available in Dutch</li>
<li>Our CAPTCHA is available in English</li>
<li>Our CAPTCHA is available in Estonian</li>
<li>Our CAPTCHA is available in French</li>
<li>Our CAPTCHA is available in German</li>
<li>Our CAPTCHA is available in Greek</li>
<li>Our CAPTCHA is available in Hebrew</li>
<li>Our CAPTCHA is available in Hungarian</li>
<li>Our CAPTCHA is available in Italian</li>
<li>Our CAPTCHA is available in Lithuanian</li>
<li>Our CAPTCHA is available in Norwegian</li>
<li>Our CAPTCHA is available in Portuguese</li>
<li>Our CAPTCHA is available in Polish</li>
<li>Our CAPTCHA is available in Romanian</li>
<li>Our CAPTCHA is available in Russian</li>
<li>Our CAPTCHA is available in Slovak</li>
<li>Our CAPTCHA is available in Spanish</li>
<li>Our CAPTCHA is available in Swedish</li>
</ul>


KeyCAPTCHA – Social WordPress CAPTCHA

See this otherview (rus): https://intsystem.org/captcha/vzlom-keycaptcha/



It is unsecure

Our captcha is the free unique anti-spam solution. This captcha does not require any text typing. Moreover, the captcha contains social features.

WFMattR

Mark Maunder

wfryan

wfmatt

<h3>WORDFENCE LOGIN SECURITY</h3>
<p>Wordfence Login Security contains a subset of the functionality found in the full Wordfence plugin: Two-factor Authentication, XML-RPC Protection, and Login Page CAPTCHA.</p>
<p><strong>This plugin is being discontinued on or around July 1, 2026.</strong></p>
<p>All of its features are already included in the main Wordfence plugin, which is also available to use for free. We recommend installing Wordfence to continue receiving updates, security improvements, and full functionality.</p>
<p><a href="https://wordpress.org/plugins/wordfence/" rel="ugc">Install the full Wordfence plugin</a></p>
<h4>TWO-FACTOR AUTHENTICATION</h4>
<ul>
<li>Two-factor authentication (2FA), one of the most secure forms of remote system authentication available.</li>
<li>Use any TOTP-based authenticator app or service like Google Authenticator, Authy, 1Password or FreeOTP.</li>
<li>Enable 2FA for any WordPress user role.</li>
<li>Completely free to use, no limits or restrictions of any kind.</li>
</ul>
<h4>LOGIN PAGE CAPTCHA</h4>
<ul>
<li>Easily enable Google ReCAPTCHA v3 on your login and registration pages.</li>
<li>Stops bots from logging in without inconveniencing your site visitors.</li>
<li>Robust protection against password guessing and credential stuffing attacks distributed across large IP pools</li>
</ul>
<h4>XML-RPC PROTECTION</h4>
<ul>
<li>XML-RPC is the biggest target for WordPress attacks, but is often overlooked.</li>
<li>Protect XML-RPC with 2FA or disable it altogether if it’s not needed.</li>
</ul>


Wordfence Login Security

The Plugin works and integrates nicely into wordfence security and wp itself. TOTP works great, and the captcha integration works too. Sadly it doesn't support multiple 2fa methods like TOTP & "backup codes" as well as email as backup. Other 2fa methods like U2F are not supported. This Plugin doesn't work with the yubico yubikey hardware keys. 

Good, but somewhat limited

Good compliment to Wordfence, but please add login URL obfuscation!

Because you do not do this either I take another plugin as well like WPS Hide Login, or I just take WP Cerber which does everything!

Great, but...

Easy to use


Does not include the ability to limit login attempts, add password complexity requirements, or anything that would comprise modern security best practices. It's strictly a 2FA plugin, which is done more simply and better by other plugins. It does work tho.


Too much load for a simple 2FA plugin

Secure your website with Wordfence Login Security, providing two-factor authentication, login and registration CAPTCHA, and XML-RPC protection.

KeyCAPTCHA – Social WordPress CAPTCHA vs Wordfence Login Security