Cap – Open-source, self-hosted CAPTCHA alternative to reCAPTCHA

Cap is a free, open-source CAPTCHA alternative. Self-hosted, privacy-first, no Google. Proof-of-work and instrumentation, no visual puzzles. Apache 2.0.

关键词：proof-of-work, computational challenge, cryptographic puzzle, challenge-response protocol, human verification, anti-bot, anti-abuse, automated attacks, bot detection, bot mitigation, api protection,…