On Telegram, as on Twitch and Discord, a community can come under attack: not only from a single disruptive user, but from coordinated actions.
In many cases, the issue is simply a single disruptive user. However, more complex situations can occur: coordinated attacks that, if not handled quickly, can damage the user experience, drive members away, or even lead to temporary restrictions or closure of the group.
For this reason, Doublegram Captcha is becoming Doublegram Security, introducing new tools designed to protect Telegram communities of any size in a proactive, continuous, and automated way.
The new Full Response mode also enables administrators to react to security incidents much faster, significantly reducing the time required to respond.
Smarter Entry Verification
Doublegram Security continues to provide a free multi-layer verification system that dramatically reduces bots and fake accounts attempting to join Telegram groups.
Unlike traditional captcha systems based solely on puzzles or simple challenges, Doublegram Security combines multiple signals to make verification both more effective and less intrusive for legitimate users.
Verification now also works in groups that require approval for join requests. When someone requests access, the bot can contact them privately and complete the verification before they are admitted.
Users who successfully complete the verification are automatically approved.
Users who fail verification never enter the group, and existing members never see failed attempts, verification messages, or unnecessary clutter in the conversation.
In addition, thanks to the Cross-Group Trust system, users who have already proven to be trustworthy in other communities protected by Doublegram Security can join without repeating previous verification steps.
The goal is simple: reduce friction for legitimate users while increasing scrutiny for suspicious accounts.
Keeping the Entire Staff Informed, Not Just the Owner
As a community grows, its security should never depend on a single person.
One of the most common limitations of moderation systems is that alerts are only sent to the group owner. If the owner is unavailable, has never opened the bot in a private chat, or simply isn't the person managing the community at that moment, important security events can easily go unnoticed.
With Doublegram Security's new notification system, administrators can connect a dedicated log channel or a private staff group where important events are automatically collected.
The moderation team can receive notifications about:
- users removed for failing verification;
- users blocked by the geographic firewall;
- security events detected by Premium protection;
- raid and flood incidents.
Every administrator can access the same event history in real time without manually checking the bot or waiting for internal communication.
When something happens, the right people receive the information immediately.
Premium: When the Problem Isn't Getting In, but What Happens Next
Captcha verification is designed to stop bots and unwanted accounts before they enter.
But many security problems begin after that.
Organized spam campaigns, flooding, and accounts that appear legitimate before launching attacks minutes later are situations that a traditional captcha alone cannot solve.
That's why we've introduced a new generation of Premium security tools.
Anti-Raid: Detecting Coordinated Attacks
The Anti-Raid system continuously monitors group activity and automatically detects suspicious behavior.
Sudden spikes in new members, identical messages posted by multiple accounts, groups of users joining from the same connection, and many other signals may indicate a coordinated attack.
When an incident is detected, Doublegram Security immediately alerts all administrators.
Each administrator receives a control panel with quick actions to respond:
- mute affected accounts;
- delete attack messages;
- temporarily switch the group to read-only mode;
- close new member access;
- ban the accounts involved;
- mark the event as a false positive;
- revert the actions previously performed by the bot.
The most sensitive actions require confirmation, and nearly every automated action can be reversed.
Choose How Automated Your Protection Should Be
Not every community wants the same level of automation.
That's why Anti-Raid can be configured with multiple response levels.
You can simply receive an alert and handle everything manually.
Or you can allow Doublegram Security to respond automatically whenever an attack is detected.
With configurable response policies, you can decide exactly what should happen:
- automatically mute newly joined attackers;
- delete attack messages;
- temporarily close group access;
- automatically apply bans according to your configured rules.
Administrators always remain in control, while the most urgent actions can be handled automatically.
Anti-Flood: Protection Against Chat Abuse
The Anti-Flood system protects communities from users who send too many messages or repeatedly post the same content.
Unlike Anti-Raid, it focuses on individual abusive users rather than coordinated attacks.
The system monitors every member of the group, not only newly joined users.
Administrators can configure thresholds and choose the appropriate response:
- message deletion;
- temporary mute;
- ban.
Additional Protection for Advanced Communities
Doublegram Security Premium also includes several additional tools to keep communities cleaner and safer.
Banned Words
Administrators can create custom lists of prohibited words or phrases.
When prohibited content is detected, the system can automatically delete the message, mute the user, or apply a ban, while simultaneously notifying the moderation team through the notification system.
Geographic Firewall
The Geographic Firewall allows administrators to control access based on the country detected during verification.
Admins can create allowlists or blocklists and decide whether users who don't meet their requirements should be removed or prevented from joining.
We covered this feature in more detail when we launched it: Telegram Captcha for groups security now with Geo-Blocking firewall.
Cross-Group Trust
Communities using Doublegram Security benefit from a shared trust system.
Users already verified in other protected groups can skip verification again, while administrators can configure how long trust remains valid and which requirements must be satisfied.
Security That Works Quietly in the Background
Moderating a community shouldn't require administrators to constantly monitor every conversation.
That's exactly why Doublegram Security exists: to verify users before they join, detect suspicious behavior, inform the moderation team, and automatically respond whenever necessary.
Captcha verification remains the first free layer of protection.
With Premium, communities gain a complete security platform featuring attack detection, configurable automated response, and advanced moderation tools that help keep every Telegram group safe and under control.