Anti-raid shield with
Automatic storm mode
When dozens of accounts flood into your group at once, every second counts. Telm detects the surge instantly and switches on storm mode — every newcomer has to verify with the bot before they can write, while your existing members keep chatting — warns you personally, and lifts it by itself once the wave passes.
- Surge detection in real time
- Mandatory newcomer verification
- Lifts itself automatically
What the shield does
Join-surge detection
The shield watches how fast new accounts join. A configurable spike — dozens of joins within a short window, scaled to the size of your group — switches storm mode on automatically, day or night.
Storm mode: every newcomer verifies
During a raid every newcomer has to verify with the bot before they can write, and welcome messages are suppressed so raiders get no airtime. The chat stays open for your existing members, and the flood dies before they even notice.
Personal owner alert
You get a direct message from the bot the moment a raid starts — with what triggered it and what the shield is doing. Manual override commands /raidon and /raidoff are always available.
Lifts on its own
The shield never changes your chat's permissions, so there is nothing to undo afterwards. Storm mode switches off by itself when its window ends; a continuing surge can extend it, but never beyond an hour from the moment it switched on — or beyond the duration you set, if that is longer than an hour.
A raid's timeline — from spike to recovery
Why communities trust the shield
- A raid becomes a log line - what used to be an hour of panic — banning bots one by one at 3 AM — now handles itself: the moment the shield switches on, the bot sends you a direct message and a push notification in the mobile app.
- Real members are untouched - existing members keep chatting through the whole episode; only newcomers pass extra verification while storm mode is active.
- You stay in control - thresholds and windows are configurable per group, and /raidon and /raidoff let you switch storm mode on or off manually at any time.
How storm mode wins against bot raids
A raid is an economics problem for the attacker: they need cheap, fast access to your members before anyone reacts. Storm mode destroys that economics. The moment joins spike, every newcomer has to verify with the bot before they can write, and welcome announcements go silent — so the raid buys the attacker nothing. Because it's automatic, the response time is seconds, not 'whenever an admin wakes up'.
The shield is also careful about your group's normal life. It never touches the chat's permissions: existing members keep writing as usual, and only accounts that join during the surge are asked to verify. The threshold grows with the size of the group — one join per minute for every 200 members, never fewer than 10 — so the ordinary inflow of a big community does not trip it. Legitimate newcomers who arrive during a storm pass a quick check and chat normally.
Frequently asked questions
How fast does the shield react to a raid?
Within seconds of the join-rate threshold being crossed. Detection, mandatory newcomer verification and the owner alert are all automatic — no admin needs to be online.
Will storm mode disturb my existing members?
No. Existing members keep full permissions and normal chat. Only accounts joining during the storm face extra verification, and the mode lifts itself automatically when the surge ends.
What if the shield triggers by mistake — say, after a viral post?
Genuine newcomers just pass a quick check with the bot and get in; nobody is banned by the shield itself, and existing members never notice. The threshold already grows with your group's size, you can lift storm mode instantly with /raidoff, and you can raise the join-rate threshold per group so viral growth never looks like a raid.
Can I switch storm mode on manually?
Yes — /raidon flips storm mode on immediately, /raidoff lifts it. Useful when you see trouble coming before the automatic threshold fires.
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