Telegram Watchdog: Group CAPTCHA

Bot • Moderation & Anti-Spam

About this App

Any open Telegram group sooner or later attracts spammers: overnight, dozens of newcomers show up pushing casinos and "easy money". Telegram Watchdog shuts that door with a CAPTCHA. 🐕

The bot checks everyone who asks to join a group and lets in only those who pass. The moderator sets it up once and forgets about manual cleaning.

Checking people out of the group's sight

The main feature is that verification happens in a private chat with the newcomer. Verification messages never clutter the group, and members see only real conversation.

The bot works through join requests. A person taps an invite link, sends a request, receives a CAPTCHA from the bot and either passes it or stays outside. The check itself opens in a Telegram web app. ✅

Spam bots. Simple scripts cannot solve the task and drop out.
A clean chat. No "welcome" or "please verify" messages appear in the group.
Less admin work. No need to ban dozens of accounts by hand.

Connecting to a public group in five minutes

Find the bot in Telegram and press Start.
Tap the button that sets the bot as a group admin.
Keep the permission to invite users via link switched on.
Enable "Approve New Members" in the group settings.

After that the bot reacts to every new request. It needs no extra commands, and all control goes through group settings. 🔧

What about a private group

Private groups have a catch: the default invite link cannot be changed, so people join through it without any check. The bot never sees those joins.

The fix is simple. Create a fresh link that requires approval and revoke the old one if you already shared it. Then every new member goes through the CAPTCHA. 🔗

What the bot knows about people

The bot can see only the information a person made public in their profile. According to the service description, no data is saved on the bot's server.

The privacy policy covers the official bot and its code only. Copies run by someone else are outside those terms, so connect the original. 🔐

Where a CAPTCHA falls short

No protection is perfect. A human hired for pennies can pass any CAPTCHA, and spam from accounts that have long been members of your group will not be stopped by one.

Group rules. Pin them in the chat so offenders know why they are removed.
Limits for newcomers. Forbid links and forwards during the first days.
Helper moderators. Two or three reliable people beat one tired admin.
Copy checks. Fakes posing as well-known guard bots ask for extra rights or money. Do not give either.

Who needs Watchdog

Owners of open communities, channel chats, courses and hobby clubs. Especially those whose comments regularly fill with advertising bots.

For a small closed chat of friends the check is overkill. For a group of thousands, such protection saves hours every week. 🛡️

#Telegram#Bot#Moderation & Anti-Spam

Frequently Asked Questions

What does Telegram Watchdog do?▼

It screens new group members with a CAPTCHA to filter out spam bots. The check happens in a private chat with the bot, so the group stays free of extra messages. It works through join requests.

How do I connect the bot to a group?▼

Start the bot, tap the button that makes it an admin, keep the permission to invite via link and turn on Approve New Members in the group settings. After that the bot checks each request.

What about a private group?▼

The default invite link of a private group cannot be changed, so people join through it unchecked. Create a new link with approval and revoke the old one if it was already shared.

What data does the bot collect?▼

The bot sees only what a user made public in their Telegram profile. According to the service description, no data is stored on its server. The policy covers the official bot only, not copies.