Sites and apps similar to reCAPTCHA include Cap Captcha, which is free and open source. Other options are Anubis, Cloudflare Turnstile, ALTCHA and Procaptcha. Anti-Spam Tools like reCAPTCHA are a crowded field, with more than 25 alternatives for self-hosting.
TrustCaptcha is a privacy-first, invisible CAPTCHA that protects your website from bots and spam—without disrupting your users.
Germany
EU
MTCaptcha is a smart captcha service that prioritizes privacy and accessibility. It offers an adaptive invisible noCaptcha that is easy for humans but hard for bots, making verification frictionless. MTCaptcha is GDPR and WCAG compliant, ensuring that your data is never sold or...
Canada
conCaptcha is a self-hosted captcha which is faster, more user-friendly and more customizable than other captchas - available for PHP and ASP.NET websites. Users no longer have to read any annoying text images, solve difficult math equations or play any puzzle games.
AuthKong is a smart captcha service designed to protect websites from spam and abuse while ensuring real users can pass through effortlessly. It offers a more user-friendly and effective alternative to traditional captcha systems like reCAPTCHA, featuring easy-to-use slider and...
Pakistan
A zero database architecture, powered by a proprietary hybrid in-memory indexing engine algorithm, that enables CAPTCHA authentication to be performed using minimal data bits against server memory.
Poland
