Tag
7 catalogue entries use this topic; each Project's license policy is labeled separately.
Self-hosted CAPTCHA that verifies visitors without puzzles
Cap is a self-hosted CAPTCHA that checks visitors with background proof-of-work and browser challenges instead of image puzzles.
Proof-of-work CAPTCHA alternative with no cookies or tracking
ALTCHA is a self-hosted CAPTCHA alternative that blocks bots and form spam with a silent proof-of-work challenge instead of image puzzles.
Privacy-focused proof-of-work CAPTCHA with no tracking or puzzles
mCaptcha is a free, self-hosted CAPTCHA that protects websites and forms with proof-of-work challenges instead of image puzzles or visitor tracking.
Privacy-focused CAPTCHA that replaces reCAPTCHA and hCaptcha
Procaptcha is a privacy-focused CAPTCHA that drops into any form as a reCAPTCHA or hCaptcha replacement, passing real humans invisibly and challenging suspected bots.
Privacy-first proof-of-work CAPTCHA with invisible checks
Private Captcha is a privacy-first proof-of-work CAPTCHA that blocks bots with invisible cryptographic checks instead of puzzles, tracking, or cookies.
Privacy-friendly CAPTCHA with invisible proof-of-work puzzles
Friendly Captcha is a privacy-first bot protection service that secures websites, forms, and APIs with invisible proof-of-work puzzles instead of image challenges.
Hosted bot detection and risk assessment for website and application traffic
reCAPTCHA is Google’s hosted service for assessing automated traffic and applying bot protection to websites and applications.