Best Telegram Anti-Spam Bots Compared: Honest Guide for 2026

Full disclosure: I built Varta, so I'm biased. But I also know more about this space than most people, and I'm going to be honest about where each bot shines and where it doesn't. If another bot is better for your use case, I'll tell you. All bots covered here use Telegram's Bot API — what differs is how they reason about each message they receive.

Let's go through them.

Combot

What it is: One of the oldest Telegram moderation bots. Focuses on group analytics, member statistics, and basic moderation rules.

What it does well: Analytics. If you want to know who's the most active member, peak activity hours, or member growth trends — Combot is solid. The dashboard is mature and well-designed.

Where it falls short: Spam detection is rule-based, not AI. You set triggers manually. It doesn't learn from your group, doesn't analyze images, and doesn't share intelligence across groups. For pure anti-spam, it's a management tool being used as a security tool.

Price: Free tier with limits, paid plans from ~$10/month.

Best for: Admins who care more about community analytics than spam protection.

Rose Bot

What it is: A popular free bot with a wide range of commands for group management — welcome messages, filters, notes, warnings.

What it does well: It's free and feature-rich for manual moderation. The command system is extensive. Large community of users.

Where it falls short: Everything is manual. You write keyword filters by hand. No AI, no image detection, no learning. False positives from keyword matches are common. Requires significant time investment to configure properly. Essentially, you become the spam detection — Rose just executes your rules.

Price: Free.

Best for: Admins who enjoy configuring bots and want a Swiss Army knife for group management beyond just spam.

Shieldy

What it is: A CAPTCHA-based bot that challenges new members with a math problem or button press before allowing them to post.

What it does well: Simple setup, one-purpose tool. Stops the most basic automated spam bots.

Where it falls short: CAPTCHAs are increasingly ineffective against human-operated spam farms. Creates friction for legitimate new members — especially on mobile. Doesn't help with spam from established accounts. No message analysis at all. In 2026, the "solve this before you can speak" approach feels outdated.

Price: Free.

Best for: Very small groups with a simple bot spam problem (not human spammers).

Watchdog (watchdog.chat)

What it is: An AI-powered anti-spam bot with tiered pricing, built by Ben Katz. Claims 60,000+ users.

What it does well: AI-based detection, solid track record, mature product. Has been around long enough to build a reputation database.

Where it falls short: No free plan — starts at $29/month, goes up to $499/month. For many admins, that's hard to justify without a trial period. No public information about whether it learns per-group or uses a generic model. English-focused.

Price: $29–$499/month. No free tier, no public trial.

Best for: English-speaking communities with budget for dedicated anti-spam, especially larger operations.

ModerAI (personym-ai.com)

What it is: A newer AI moderation bot with avatar scanning, message context analysis, and edit detection.

What it does well: Active content marketing (Medium, Dev.to). Scans profile pictures for stock/AI-generated images — a nice signal for detecting fake accounts. Detects when spammers edit messages after posting.

Where it falls short: $9 per chat per month adds up fast if you manage multiple groups. No voice interaction, no progressive trust system. Limited language support.

Price: $9/chat/month.

Best for: Single-group admins who want AI detection and don't mind the per-group pricing model.

Varta

What it is: AI moderation bot that learns the specific rules and context of each group. Yes, this is ours.

What it does well: Group-specific learning — Varta analyzes your group's name, description, and conversation patterns to understand what's normal for your community. You can talk to Varta in text or voice to correct mistakes, explain context, or ask about its actions. Progressive trust system lets you start in shadow mode and gradually give the bot more autonomy. Cross-group intelligence means a spammer banned in one Varta-protected group is flagged across the network. 33 languages. Google Safe Browsing for link checking. Image and QR code analysis.

Where it falls short: Newer product, smaller user base than Combot or Rose. No web dashboard yet (everything through Telegram and the Mini App). Feature set is still growing.

Price: Free forever plan with basic keyword protection. AI paid tiers: Hobby $5/month (2K members), Starter $19/month (5K), Pro $49/month (25K), Business $99/month (100K). 5-day AI trial — no card required — and the trial timer only starts when Varta catches your first spam. Groups that never see spam stay free indefinitely.

Best for: Admins who want moderation that works without configuration, especially multilingual groups, crypto/trading communities, and anyone who'd rather not maintain keyword lists.

Summary table

So which one should you pick?

If you want analytics and community insights → Combot.

If you want a free Swiss Army knife and don't mind manual work → Rose.

If you just need basic bot blocking → Shieldy (but consider if it's enough).

If you have budget and want proven AI protection → Watchdog.

If you manage a single group and want AI with avatar scanning → ModerAI.

If you want AI that learns your specific group, works in your language, and lets you talk to it → try Varta.

No bot is perfect. But in 2026, keyword lists and CAPTCHAs are not enough. The question is whether you want a tool you configure, or a tool that learns.

Varta is free to start. No setup, no card, no commands to memorize. Add to your group →