Protect a Telegram channel from spam and bots (2026)

TL;DR. A growing Telegram channel attracts bots and spammers two ways: at the door (mass join requests) and in the comments. AdminHub’s channel protection handles both on autopilot — a captcha right in the join flow, screening against a known-spammer database, anti-raid for sudden surges, and comment filters with auto-mute and ban. No 24/7 moderator.

The bigger a channel gets, the more it shows up on spammer radar. Bots mass-request to join so they can DM your members or post links the moment comments open. A raid floods the join queue in minutes. And the comment chat fills with the usual junk — invite links, forwards, phone numbers, stop-words. Deleting it by hand doesn’t scale, and you shouldn’t have to wake up to a raid.

Channel protection puts automatic barriers in the three places spam actually lives: the door, the surge, and the comments.

What channel protection does

• Captcha at the door — each applicant passes a quick check right inside the join flow (Bot API 10.1). Bots that join in bulk don’t get through.
• Known-spammer screening — every request is checked against a database of known spam accounts; matches are declined automatically, before the captcha even shows.
• Anti-raid — when join requests arrive in a flood, the bot catches the surge by threshold and pauses the door until the wave passes.
• Comment moderation — links, invites, forwards, phone numbers and contacts, and your own stop-words are removed automatically.
• Anti-flood & anti-duplicate — a burst of messages or the same text repeated gets muted, then banned past a threshold.
• Smart catch + log — spam that slips past the rules is caught by AI; every action lands in a log, and rules are tuned per channel.

Who it’s for

• Channels with open join requests and a comment chat.
• Anyone tired of deleting spam by hand — or who’s been hit by a join raid.
• Owners who’d rather write content than play night-shift moderator.

The actual flow

Add your bot to the channel and its comment chat as admin, turn protection on in the Mini App, and pick how strict to be. From there the bot handles it: requests pass the captcha, known spammers and raids are turned away, and comment junk is removed on its own. You watch the log and adjust the rules any time.

The captcha works on every client

The captcha at the door uses Telegram’s native join-flow Mini App on up-to-date apps; on an older client it falls back to a simple in-chat check instead. Either way, no one gets in without passing — there’s no version where the door is left open.

What it isn’t

This is a set of automatic barriers, not a magic spam oracle. It’s tuned to catch the common patterns — bots, raids, link/forward/contact spam, floods — and you stay in control: thresholds and stop-words are yours, and you can always step in by hand. It won’t read minds, but it will stop you from babysitting the join queue and the comments.

What to do now

• Open AdminHub Channel Protection and add your bot as admin to the channel and its chat.
• Turn on the captcha and pick a strictness level.
• Set your anti-flood thresholds and a stop-word list for comments.
• Watch the log for a day — then forget the join queue exists.

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Full feature list on the AdminHub Channel Protection page. Once the channel is clean and growing, see paid content on Telegram to earn from it, and the AdminHub post editor to make your announcements look the part.