Math CAPTCHA for CF7, WPForms, and any HTML form. Zero config — install, add shortcode or use auto inject from settings.
Alternatives to CH Captcha
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Build contact forms, save entries, personalise email alerts and add optional Call Us and WhatsApp Us buttons. Includes CAPTCHA.
Add antispam Yandex SmartCaptcha for your forms with Contact Form 7
A powerful, lightweight, and smart Math Captcha solution to block spam from Contact Form 7, WP Login, WooCommerce, and Tutor LMS forms.
Anti-spam CAPTCHA plugin for Contact Form 7. Block bots using Cloudflare Turnstile, Google reCAPTCHA, and built-in Arithmetic CAPTCHA challenges.
Friendly Captcha is a privacy-first anti-bot solution that protects WordPress website forms from spam and abuse.
Contact Form Blockv1.1.3
Tired of those heavy and old contact forms? Try this one. Simple, yet modern, pretty and extremely optimized. No JS or CSS files are loaded.
Export, import, and migrate Contact Form 7 forms. Store entries and protect forms with Captcha Shield (reCAPTCHA + Math Captcha).
Liuer Contact Formv0.2.10
Build secure drag-and-drop forms, store submissions, send email and reduce spam.
Adds a secure, flexible image captcha field to Contact Form 7 with zig-zag protection, timer, refresh, AJAX validation, and accessibility support.