Core Difference: Context vs Regular Expressions
Historically, Combot and other bots (Rose, Shieldy) work based on stop-word lists (regular expressions). If a spammer writes "buy crypto", the bot blocks it. But if a spammer writes "my friend acquired a promising token yesterday", the classic bot misses it. And if a real user asks "where to legally buy crypto?", the bot triggers a false ban (False Positive).
ContextGuards uses Google Gemini for deep semantic analysis. The bot reads the message just like a human: it understands sarcasm, conversation context, veiled threats, and even hidden phishing in URLs.
Data Privacy & Self-Hosted
Combot is a centralized SaaS product. To make it work, you add it to your chats, and all conversations of your community pass through third-party servers.
ContextGuards is sold as a Self-hosted model. You buy the code once and deploy it on your own Cloudflare Workers account. 100% privacy: no one except you and the Google Gemini API (which does not train on API data) has access to the conversations.
Total Cost of Ownership
Combot requires a monthly subscription for large chats (from $50/month).
ContextGuards is a one-time license purchase ($99). Hosting on Cloudflare Workers is completely free up to 100,000 requests per day, covering 99% of Telegram groups.
Comparison Table
| Feature | ContextGuards | Combot |
|---|---|---|
| Context Understanding | ✅ Yes (Gemini 2.0) | ❌ No (Keywords) |
| False Positives | ✅ ~0% | ❌ High probability |
| Data Privacy | ✅ Self-Hosted (Your server) | ❌ Third-party server |
| Monthly Fees | ✅ No (One-time purchase) | ❌ Yes |