Comparison of anti-spam bots for Telegram

Anti-spam bots are essential tools for keeping Telegram channels and groups clean from unwanted messages, scam links, and malicious users. The right bot can save administrators hours of manual moderation each week, but choosing between dozens of available options requires understanding their features, limitations, and pricing. Here's a detailed comparison of the most popular anti-spam bots available today.

Why You Need an Anti-Spam Bot

Telegram's built-in moderation tools offer basic protection — slow mode, restricted permissions, and manual banning — but they fall short for active communities. Once a group exceeds 500-1,000 members, spam attacks become frequent and sophisticated. Bots fill this gap by automatically detecting and removing spam before most members even see it.

Without automated protection, spam can damage your community's reputation, drive away engaged members, and even expose users to phishing and scam links. Channels that publish content to the web via platforms like tgchannel.space especially benefit from clean content, since spam that leaks into posts can affect your blog's SEO and credibility.

Top Anti-Spam Bots Compared

1. Combot (@comaborot)

Combot is one of the most established moderation platforms for Telegram, offering a comprehensive suite of tools beyond just spam filtering.

Key Features:
- Automated spam detection using machine learning
- Customizable welcome messages and CAPTCHA verification
- Detailed analytics dashboard with member activity tracking
- Auto-removal of join/leave service messages
- Reputation system for members

Pricing: Free for groups under 200 members. Premium plans start at $9.99/month for groups up to 10,000 members.

Best For: Medium to large communities that want analytics and moderation in a single package.

Limitations: The free tier is quite restrictive. Response time can lag during peak hours on the free plan.

2. Group Help Bot (@GroupHelpBot)

A versatile bot that combines anti-spam with group management features, popular among Russian-speaking communities.

Key Features:
- CAPTCHA for new members (math problems, button clicks)
- Keyword-based filtering and blacklists
- Auto-delete messages containing specific types of content (links, forwards, stickers)
- Warn/mute/ban escalation system
- Configurable rules and welcome messages

Pricing: Free with optional donations. Premium features available for ~$3-5/month.

Best For: Small to medium groups seeking a free, feature-rich solution.

Limitations: Interface can feel cluttered. Configuration is done entirely through chat commands, which has a learning curve.

3. Shieldy (@shaborieldy)

Shieldy focuses on one thing — CAPTCHA verification for new members — and does it well. It's open-source and lightweight.

Key Features:
- Multiple CAPTCHA types: button press, arithmetic, custom questions
- Configurable timeout (how long new users have to solve the CAPTCHA)
- Auto-kick for users who fail verification
- Minimal setup — works out of the box
- Open-source (self-hostable)

Pricing: Completely free.

Best For: Channels and groups that primarily suffer from bot-driven spam (automated accounts joining and posting).

Limitations: Only addresses new-member spam. Does not filter messages from existing verified members. No analytics or advanced moderation tools.

4. Rose (@MissRose_bot)

Originally popular in English-speaking communities, Rose offers a balanced mix of moderation and anti-spam features.

Key Features:
- Spam detection with adjustable sensitivity
- Blacklist and whitelist management
- Anti-flood protection (rate-limiting messages)
- Note system for storing group rules and FAQs
- Federation system to share ban lists across multiple groups
- Welcome messages with custom buttons

Pricing: Free for core features. Premium unlocks advanced filters and priority support at $5/month.

Best For: English-speaking communities managing multiple related groups.

Limitations: Some advanced features require familiarity with command syntax. Occasional downtime has been reported.

5. BotFather's Built-in Aggressive Mode + Telegram's Native Tools

Telegram itself has been steadily improving its anti-spam capabilities, especially since 2023.

Key Features:
- Aggressive anti-spam mode in group settings (admin panel)
- Automatic deletion of suspicious messages in groups with 200+ members
- Slow mode to limit message frequency
- Restricted permissions for new members
- Admin-level content filtering

Pricing: Completely free — built into Telegram.

Best For: Groups that prefer minimal third-party bot usage and want a simple, zero-configuration approach.

Limitations: No customization — you can't adjust detection sensitivity. No CAPTCHA. Limited to Telegram's own detection algorithms, which can produce false positives.

6. Protectron (@Protectron_bot)

A newer bot that leverages AI-based spam classification with a focus on reducing false positives.

Key Features:
- AI-powered message analysis
- Profile-based risk scoring for new members
- Link preview scanning for phishing detection
- Customizable action rules (delete, mute, ban)
- Dashboard with moderation logs

Pricing: Free for groups up to 1,000 members. Pro plan at $7/month for larger groups.

Best For: Groups that experience sophisticated spam (not just bot accounts but human spammers with realistic profiles).

Limitations: Relatively newer, so community support is smaller. AI detection occasionally needs manual correction during the learning period.

Feature Comparison Table

Feature Combot GroupHelp Shieldy Rose Native Protectron CAPTCHA Yes Yes Best Yes No Yes ML Spam Detection Yes Basic No Yes Yes Best Analytics Best Basic No Basic No Yes Anti-Flood Yes Yes No Yes Slow mode Yes Link Filtering Yes Yes No Yes No Yes Ban Federation No No No Yes No No Free Tier Limited Generous Full Generous Full Moderate Open Source No No Yes No N/A No

Step-by-Step Setup Guide

Step 1: Assess Your Needs

Before choosing a bot, answer these questions:
- How large is your group? (Under 500, 500-5,000, or 5,000+)
- What type of spam do you get? (Bot accounts, human spammers, link spam, forwarded messages)
- Do you need analytics and reporting?
- What's your budget for moderation tools?

Step 2: Add the Bot to Your Group

Search for the bot in Telegram (e.g., @combot)
Open the bot's profile and tap "Add to Group"
Select your group from the list
Grant admin permissions — at minimum, the bot needs Delete Messages and Ban Users permissions

Step 3: Configure Initial Settings

Most bots use chat commands for configuration. Common setup commands include:
- /settings — open the configuration menu
- /captcha on — enable join verification
- /antispam on — activate spam detection
- /sensitivity medium — set detection aggressiveness

Step 4: Test Before Going Live

Add the bot to a test group first. Simulate spam messages to verify detection works correctly. Adjust sensitivity to minimize false positives — legitimate messages being flagged as spam frustrate real members.

Step 5: Monitor and Adjust

Check moderation logs weekly for the first month. Look for patterns in false positives and false negatives, then fine-tune your filters and blacklists accordingly.

Tips & Best Practices

Layer your defenses: Combine Telegram's native anti-spam with one dedicated bot. For example, use Shieldy for CAPTCHA and Combot for message filtering — they handle different attack vectors.
Start with moderate sensitivity: It's better to catch 80% of spam without false positives than 99% with legitimate messages being deleted. You can increase sensitivity gradually.
Use CAPTCHA strategically: Enable CAPTCHA verification during spam waves, but consider disabling it during growth campaigns when you want frictionless onboarding.
Maintain a shared ban list: If you manage multiple groups, use Rose's federation feature or manually sync ban lists to prevent known spammers from hopping between your communities.
Review deleted messages periodically: Most bots log what they delete. Check these logs to catch false positives and train the bot's filters.
Keep your bot tokens private: Never share bot tokens publicly. A compromised token lets attackers remove your bot or use it maliciously.

Common Mistakes

Mistake 1: Giving bots excessive permissions
Why it's wrong: A compromised or malfunctioning bot with full admin rights can delete all messages or ban all members.
How to avoid: Grant only the minimum required permissions — typically Delete Messages, Ban Users, and Pin Messages.

Mistake 2: Running multiple anti-spam bots with overlapping features
Why it's wrong: Bots can conflict, each trying to delete the same message or act on the same user simultaneously. This creates log noise and unpredictable behavior.
How to avoid: Choose bots with complementary features. One for CAPTCHA, another for content filtering — not two bots both doing content filtering.

Mistake 3: Setting spam sensitivity too high from day one
Why it's wrong: Overly aggressive filtering scares away new members whose legitimate messages get deleted. They leave without understanding why they were silenced.
How to avoid: Start at medium sensitivity and increase only after monitoring results for 1-2 weeks.

Mistake 4: Never updating filter rules
Why it's wrong: Spammers adapt their tactics. Keyword lists and rules from six months ago won't catch new spam patterns.
How to avoid: Review and update your blacklists and filter rules monthly. Add new spam keywords as you spot emerging patterns.

Mistake 5: Ignoring bot downtime
Why it's wrong: Free bots occasionally go offline. During downtime, your group is unprotected and spam floods can occur.
How to avoid: Have a backup bot configured (but disabled) that you can quickly activate if your primary bot goes down.

Frequently Asked Questions

Can I use multiple anti-spam bots at the same time?
Yes, but only if they serve different purposes. Pair a CAPTCHA bot like Shieldy with a content-filtering bot like Combot. Avoid running two bots that both filter message content, as they may conflict with each other.

Do anti-spam bots work in channels, or only in groups?
Most anti-spam bots are designed for groups where members can post messages. Channels with comments enabled can benefit from bots moderating the linked discussion group. For channel content itself, spam is less of an issue since only admins can post.

Will an anti-spam bot slow down my group?
No. Well-built bots process messages in milliseconds. The only user-facing delay is CAPTCHA verification for new members, which typically takes 10-30 seconds. Message filtering happens invisibly in the background.

Are free anti-spam bots safe to use?
Reputable free bots like Shieldy (open-source) and the free tiers of Combot or Rose are generally safe. However, avoid obscure bots with few users or no public reputation — they could harvest data or contain malicious code. Always check a bot's user count and community reviews before adding it.

Can anti-spam bots protect against raid attacks?
Partially. CAPTCHA bots effectively block automated raids (waves of bot accounts joining). For coordinated human raids, you'll need features like anti-flood rate limiting, new-member restrictions, and the ability to quickly lock the group — which bots like Combot and Rose support.