Tag
5 catalogue entries use this topic; each Project's license policy is labeled separately.
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.