hCaptcha is described as 'Is designed to solve the most labor intensive problem in machine learning: labeling massive amounts of data in a timely, affordable, and reliable way' and is a Anti-Spam tool in the security & privacy category. There are more than 25 alternatives to hCaptcha, not only websites but also apps for a variety of platforms, including Self-Hosted, SaaS, PHP and JavaScript apps. The best hCaptcha alternative is Cap Captcha, which is both free and Open Source. Other great sites and apps similar to hCaptcha are Anubis, reCAPTCHA, Procaptcha and Private Captcha.
Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.
Cap Captcha is the most popular Self-Hosted alternative to hCaptcha.
Cap Captcha is the most popular Open Source & free alternative to hCaptcha.
Applies sha256 proof-of-work challenges to incoming HTTP requests, targeting AI crawlers, bots that ignore robots.txt, and automated scrapers, protecting server resources and preventing unwanted search engine indexing for privacy-focused sites.
reCAPTCHA is a free service that protects your site from spam and abuse, using risk analysis techniques to tell humans and bots apart.
reCAPTCHA is the most popular Web-based alternative to hCaptcha.
Prosopo Procaptcha redefines user verification with a unique approach that emphasizes privacy and security. It's a pioneering solution designed to offer an alternative to conventional CAPTCHA systems that often compromise user privacy.
Procaptcha is the most popular SaaS alternative to hCaptcha.
Private Captcha is an independent, privacy-first, self-hostable Proof-of-Work CAPTCHA service made in EU. Instead of asking users to solve complex puzzles or track their behavior, Private Captcha solves an invisible cryptographic task in the background.
ALTCHA is a privacy-first solution built to help developers and website owners stop bots, spam, and automated abuse — without making things harder for real users. It replaces traditional CAPTCHA systems with a smarter, quieter approach to verification and threat detection.
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.
mosparo is the modern solution for protecting your online forms from spam. The protection method is quite simple: mosparo blocks spam using rules matching the form’s data. The detection method is comparable to an e-mail spam filter.
Friendly Captcha is GDPR compliant.
Friendly Captcha is the best alternative to hCaptcha because it doesn't require annoying image clicking tasks.
TrustCaptcha is a privacy-first, invisible CAPTCHA that protects your website from bots and spam—without disrupting your users.
UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect a human or a computer operate with it.
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Much cheaper, long trial. Way less annoying to do the captchas and not many users seem to get them