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A telegram bot for protecting public chats with captcha

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CaptchaGuard bot

A captcha bot to secure public chats from suspicious users

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How it Works · Features · Report Bug

How it Works

CaptchaGuard is an easy-to-use bot for public chats. The bot sends a simple mathematical captcha to check if a new member of a chat is a bot. It is designed the way that a real person would complete it quite easily. Some examples of the captcha:

captcha_1 captcha_2 captcha_3 captcha_4



When a new member joins the chat, CapthaBot sends a query like this one:

captcha


If a new member happens to be a spam account, he won't respond correctly.
The user who failed to solve the captcha or ignored it counts as a bot and gets removed from the chat by CaptchaGuard.

captcha


The user who solved the captcha correctly, counts as a human.
This member is now verified and can start chatting!
They also get a greeting message if it was set by chat admin.

captcha


Features

  • 20+ unique captcha images with shuffled answers
  • This captcha is not recognized by Photomath and Google Lens
  • Customizable greeting message for new members
  • Currently available translations:
    • 🇬🇧 English
    • 🇺🇦 Ukrainian
    • 🇷🇺 Russian
  • More features coming soon!

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