Mathematical Captcha Applier is a lightweight WordPress plugin that lets users add simple math-based captchas to form submit buttons by specifying CSS selectors. Below are 21 security & compliance platforms apps with similar functionality to Mathematical Captcha Applier, matched by what each product actually does — not ranked or scored. Explore each to find the closest fit for your use case.
Math Captcha for Gravity Forms is a lightweight WordPress plugin that adds a simple math challenge to Gravity Forms, helping site owners block automated spam without using external CAPTCHA services or JavaScript. It is designed for WordPress users who want privacy-friendly, server-side spam protection for their forms.
DS CF7 Math Captcha is a WordPress plugin that integrates with Contact Form 7 to add a math-based captcha, helping site owners prevent spam form submissions. It supports multiple languages and offers a refresh option for captchas.
HSArticle Math CAPTCHA for Forms is a WordPress plugin that adds a math-based CAPTCHA to any form, including WPForms and Contact Form 7, to block spam and bots. It features server-side validation, honeypot fields, and multiple display modes, requiring no configuration. Designed for WordPress site owners seeking simple, effective form protection.
Captcha Spam Blocker is a WordPress plugin that integrates dynamic CAPTCHA across WordPress and WooCommerce forms, including login, registration, comments, and checkout. It helps site owners block spam and bot access while ensuring GDPR compliance.
Pow Captcha is a WordPress plugin that integrates Proof of Work captcha verification into forms, helping site owners prevent spam and bot submissions. It offers easy integration, customizable difficulty, and developer-friendly features without requiring users to solve visual puzzles.
Checkout Captcha for WooCommerce is a WordPress plugin that integrates reCAPTCHA verification into WooCommerce checkout, login, registration, and password reset forms. It helps store owners prevent spam and bot transactions, improving security and user experience.
Codenitive CAPTCHA Security is a free WordPress plugin that integrates Google reCAPTCHA v2 into login, registration, and contact forms for WordPress and WooCommerce. It helps site owners prevent spam and unauthorized access with easy configuration.
AI Captcha is a WordPress plugin that integrates with the aiCaptcha service to provide invisible, AI-powered CAPTCHA protection for login, registration, and WooCommerce forms. It blocks bots without annoying users and is free and open-source.
Private Captcha is a privacy-first CAPTCHA plugin for WordPress that protects login, registration, and comment forms from spam and abuse. It offers flexible widget configuration, EU compliance, and supports popular form plugins, making it ideal for privacy-conscious site owners.
Power Captcha reCAPTCHA is a WordPress plugin that integrates Google reCAPTCHA into various WordPress and WooCommerce forms to protect against spam, brute-force attacks, and fake accounts. It supports multiple CAPTCHA types and is easy to configure for site administrators.
Advanced SmartCaptcha is a WordPress plugin that integrates the Yandex SmartCaptcha service to protect site forms from spam and bots. It offers invisible captcha, login form protection, and easy setup for enhanced site security. Suitable for site owners seeking robust anti-spam measures.
Multi-Form Anti-Spam Image CAPTCHA is a WordPress plugin that provides image-based CAPTCHA, honeypot fields, and accessibility-friendly spam protection for popular form plugins and core WordPress screens. It helps site owners prevent automated spam while maintaining usability for real users. The plugin supports multiple integrations and offers styling options.
Smart CAPTCHA Alternative with Cloudflare Turnstile is a WordPress plugin that integrates Cloudflare's privacy-friendly CAPTCHA alternative to protect forms from spam and bots. It supports various WordPress and WooCommerce forms, ensuring security and user privacy.
POWER CAPTCHA is a WordPress plugin that safeguards websites and forms from bots and unauthorized users by using customizable verification parameters. It offers advanced protection beyond traditional captchas, evaluating both human and automated interactions. Ideal for WordPress administrators seeking enhanced security and GDPR compliance.
CaptchaKit for WordPress offers bot protection for WordPress sites by replacing traditional CAPTCHA images with short mini-games. The tool is designed so that real users can complete these games in about ten seconds, while automated bots are unable to do so. This approach aims to provide a more engaging and less frustrating experience compared to standard CAPTCHA solutions. The plugin integrates with various WordPress forms, including login, registration, comments, and WooCommerce checkout. It is intended to stop credential-stuffing bots at the login page, block automated account creation, prevent comment spam (without inconveniencing logged-in users), and stop fake order submissions and account abuse on WooCommerce checkout forms. Users can choose which forms to protect after installation. CaptchaKit features a selection of mini-games such as Connect 4, Pac-Man Lite, Whack-a-Bot, Color Match, Maze Runner, Fruit Sorter, and Stack It. Additional games are mentioned, including Tap in Order, Pipe Connect, Brick Breaker, Penalty Kick, Tetromino Drop, Mini Golf Putt, Asteroid Dodge, Skee-Ball, Hoops, Frogger Hop, and Duck Hunt. These games serve as the challenge mechanism in place of traditional visual CAPTCHAs. org Plugin Directory and obtain free Site and API Keys from the CaptchaKit dashboard. The keys are then entered into the plugin settings, and users can select their preferred mini-game and the forms to protect. The tool verifies users server-side and can be embedded anywhere on a WordPress site. CaptchaKit is described as a one-time purchase product. The tool is made by didyu.
CrafyCAPTCHA is a WordPress plugin that provides advanced bot and spam protection for login, registration, and e-commerce forms. It uses adaptive friction to challenge suspicious users and integrates natively with WooCommerce and popular form plugins. Suitable for site owners seeking robust, customizable CAPTCHA solutions.
Simple CAPTCHA Alternative with Cloudflare Turnstile is a WordPress plugin that integrates Cloudflare Turnstile CAPTCHA into various WordPress and WooCommerce forms. It helps site owners protect their sites from spam and bots while maintaining user privacy. The plugin is free and easy to set up, supporting a wide range of form plugins.
Advanced Google reCAPTCHA is a WordPress plugin that integrates Google reCAPTCHA into various forms to protect against spam and brute-force attacks. It supports login, registration, comment, and e-commerce forms for enhanced site security.
Smart Captcha for Google reCAPTCHA is a WordPress plugin that integrates Google reCAPTCHA v2 and v3 into login, registration, comment, and WooCommerce forms. It helps site owners prevent spam and abuse, offering a security dashboard and flexible configuration options.
Privacy CAPTCHA for Cap is a WordPress plugin that integrates the open-source Cap proof-of-work CAPTCHA into comments, login, registration, WooCommerce, and Gravity Forms. It offers privacy-friendly spam protection by running verification on the user's own infrastructure.
CaptchaFox for WordPress is a plugin that protects website forms from bots and automated attacks using GDPR-compliant challenges. It integrates with popular form plugins and provides a frictionless experience for legitimate users while blocking malicious traffic.
