Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.



reCaptcha WordPress Plugin is described as 'ReCaptcha plugin is an effective security solution that protects your WordPress website forms from spam entries while letting real people pass through with ease. It can be used for login, registration, password recovery, comments, popular contact forms, and others' and is a Anti-Spam tool in the online services category. There are nine alternatives to reCaptcha WordPress Plugin for a variety of platforms, including Web-based, SaaS, Self-Hosted, JavaScript and Angular apps. The best reCaptcha WordPress Plugin alternative is Cap Captcha, which is both free and Open Source. Other great apps like reCaptcha WordPress Plugin are IronWall, hCaptcha, Cloudflare Turnstile and mCaptcha.
Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.



hCaptcha is designed to solve the most labor intensive problem in machine learning: labeling massive amounts of data in a timely, affordable, and reliable way.



Turnstile is Cloudflare's smart CAPTCHA alternative. It automatically chooses from a rotating suite of non-intrusive browser challenges based on telemetry and client behavior exhibited during a session.


TrustCaptcha is a privacy-first, invisible CAPTCHA that protects your website from bots and spam—without disrupting your users.





Protect your business from bots and spam while ensuring 100% data privacy compliance. No puzzles, no tracking – just invisible security that works.