Protect Mailster newsletter signup forms from spam with Google reCAPTCHA v3.
Alternatives to Mailster Cool Captcha
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Lightweight, self-hosted captcha field for Fluent Forms — image, math and question/answer challenges. No external services, no tracking.
Stop spam on your WordPress forms — no CAPTCHA required. Invisible to real users.
Image CAPTCHA, honeypot and accessibility spam blocking for Gravity Forms, CF7, WPForms, Formidable, Elementor, WooCommerce, comments, and login.
Connect Gravity Forms to Mailster with field mapping, mailing list assignment, conditional signup, and double opt-in.
Math CAPTCHA for CF7, WPForms, and any HTML form. Zero config — install, add shortcode or use auto inject from settings.
Contact form builder with spam protection, captcha, file uploads and opt-in to external newsletter services (Brevo, Mailchimp, MailerLite).
Stop spam and bots across WordPress, WooCommerce, WPForms, Contact Form 7, and more with Google reCAPTCHA or Cloudflare Turnstile.
Self-hosted image CAPTCHA and silent honeypot for Login, Registration, Lost Password, and Comments forms. No API keys, no external services.
Self-hosted ALTCHA proof-of-work CAPTCHA via GateCHA. Protects WordPress forms without cookies, fingerprinting, or third-party services.