RainCaptcha: Anti-spam protection for your website.

  • Easy for people to read.
  • Hard for machines to break.
  • Easy to implement on any website.
  • Works on any webserver.
  • No registration is required.
  • Free for both personal and commercial use.
  • More than 23,000,000 captchas served.
  • Makes any website at least 20% cooler.

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