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CA

Cap

Community

Privacy-first, open-source CAPTCHA alternative using proof-of-work and instrumentation challenges instead of tracking or puzzles.

Deploy Cap

Runstiago2/cap:3.1.15
Stack node
Provisioned for itredis
VerifiedNot yet

Why deploy on Railyard

Railyard provisions redis alongside it automatically — zero-downtime deploys, automatic backups and scaling come from the same platform, on a server you already pay for.

Deploying Cap is one piece of a bigger stack you can keep building — add a database, a worker, a cache, or another app, all on the same servers you already pay for.

Good for

  • A drop-in CAPTCHA replacement for a sign-up or login form without tracking visitors
  • Bot-mitigation on a form or API endpoint using proof-of-work instead of an image puzzle
  • Self-hosted alternative to reCAPTCHA/hCaptcha for privacy-conscious sites

Good to know

  • Redis is wired up automatically for challenge storage
  • ADMIN_KEY is your dashboard login — treat it like any other admin password

Project docs ↗