Greyfu Login Captchav1.0.0
A lightweight captcha that protects your WordPress login page from automated bot attacks using a simple math challenge.
Alternatives to MB Challenge response authentication
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.
GuardianKeyv5.7
GuardianKey is a service to protect systems in real-time against authentication attacks. It implements GK Auth Security for login protection and GKTin …
Two Factorv0.17.0
Enable Two-Factor Authentication (2FA) using time-based one-time passwords (TOTP), email, and backup verification codes.
Aegis User Guardv1.3.2
WordPress identity policies for password rules, login lockouts, two-factor authentication, IP controls, and Administrator oversight.
Passkeys and two-factor authentication for WordPress. Sign in without a password, and enrol before you require 2FA by role.
Protect WordPress logins with two-factor authentication, monitor critical file changes, and manage security threats from a unified dashboard.
All-in-one WordPress authentication: social login, magic links, 2FA, brute force protection, session management & security hardening.
Configify 2FAv1.0.0
Flexible Two-Factor Authentication for WordPress. Choose Google Authenticator (TOTP), Math CAPTCHA, or Google reCAPTCHA — with a security audit log.
Face recognition login for users. Enroll your face, set a PIN, and log in without a password.
Owl Securityv1.12.1
All-in-one WordPress security: firewall, malware scanner, login protection, 2FA, and backups in one clean, lightweight dashboard.