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Security

Doublegram Captcha

Stop bot raids and spam joins in one tap. Protect your Telegram groups with human verification — setup in under 60 seconds, no friction for real members.

Add to TelegramRead the docs
One-click verification
Onboarding

One-click verification

Every new member sees a friendly, branded captcha that clears in seconds - no puzzles, no friction.

Coming Soon

We're updating this page

This page is getting a refresh. In the meantime, discover all Captcha features and how it protects your groups.

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Built-in protection

Everything to keep your group clean

Layered protection that works invisibly while your real community keeps chatting.

Instant Protection

Add the bot to your group, grant Restrict Members permission, and every new joiner is automatically muted until they verify. No commands to run, no settings to configure — protection starts the moment the bot has admin rights.

Instant Protection

Add the bot to your group, grant Restrict Members permission, and every new joiner is automatically muted until they verify. No commands to run, no settings to configure — protection starts the moment the bot has admin rights.

Frictionless Verification

New members tap a single Verify button that opens a Mini App. Low-risk users pass with invisible reCAPTCHA — no puzzles, no images to click. Only suspicious profiles get a visible "I'm not a robot" challenge, based on a risk score that checks username, photo and past verifications.

Advanced Bot Elimination

Three layers of defense: geographic firewall blocks entire countries before the captcha even loads, adaptive reCAPTCHA adjusts difficulty based on the joiner's profile, and a configurable timeout auto-kicks anyone who doesn't verify in time. Users already verified in other Captcha groups can skip the check entirely with cross-group trust.

Community Insights

Track verifications, failures and pending members over 24 hours, 7 days and 30 days with /stats right in the group. See completion rates, average verification time and top blocked countries. The Admin HQ dashboard aggregates data across all your groups in one view with a live verification history log.

Zero Configuration

Works out of the box with sensible defaults: 5-minute timeout, silent mode off, cross-group trust on. When you want control, /settings lets you tune timeout, language, silent mode and admin notifications. /firewall adds geographic blocking by country with ban or kick punishment — all without leaving the group chat.

Info & latest updates

Languages
Arabic, German, English +6 more
Platform
Telegram
Compatibility
Telegram Groups & Supergroups
FAQ

Frequently asked questions

Why choose Doublegram Captcha over other captcha bots?
Verification runs in an in-Telegram Mini App with invisible reCAPTCHA: honest users pass without touching anything, only suspicious profiles see a visible challenge. Layered defense (geographic firewall, adaptive scoring, cross-group trust) with everything configurable inside Telegram via /settings and /firewall — no external dashboard to learn.
How does the verification work for real members?
New joiners tap a single 'Verify' button that opens a Mini App with invisible reCAPTCHA. Low-risk users pass without puzzles or images to click. Only suspicious profiles get a visible 'I'm not a robot' challenge, based on a risk score that checks username, photo and past verifications.
How does Captcha block spam accounts?
Three layers of defense: a geographic firewall blocks entire countries (ban or kick), adaptive reCAPTCHA raises difficulty for suspicious profiles, and a configurable timeout auto-kicks anyone who does not verify in time. Users already verified in other Captcha groups skip the check via cross-group trust.
Can I customize how Captcha behaves?
Yes, all from /settings inside the group: verification timeout, bot language, silent mode and admin notifications. Use /firewall to add geographic blocking by country with 'ban' or 'kick' punishment. No external panel needed — everything lives in the chat.
Can I see stats about verifications and blocked spammers?
Yes. Send /stats in the group for verifications, failures and pending members over 24 hours, 7 days and 30 days, including completion rate, average verification time and top blocked countries. The Admin HQ dashboard aggregates data across all your groups with a live verification history log.
Is Doublegram Captcha free?
Yes. Core protection features — verification, firewall, cross-group trust and in-group stats — are included at no cost. Higher-tier plans on the pricing page unlock advanced options for larger communities and multi-group operators.