Shieldy
@Shieldy_botStops spam bots from joining your group with a captcha check for new members.
Challenges new group members with a question before they can post.
OrgRobot asks every new member of a group to answer a question when they join. Users who fail are removed, which keeps spam bots out.
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Stops spam bots from joining your group with a captcha check for new members.
Keeps Telegram groups clean: newcomer captcha, scam and flood blocking, fake-admin alerts. Every protection is free.
Group management bot used by over 500,000 admins: moderation, anti-spam, triggers and stats.