Spam Protection & Captcha
@AntiSpamGlobalBot
FreeEN
Captcha plus a shared spammer database: blocks known bad accounts on join and challenges the rest. Free.
Key features
- Entry captcha
- Shared spammer database check
- Automatic blocking of known bad accounts
What Spam Protection & Captcha does
Spam Protection & Captcha combines an entry challenge with checks against a shared database of accounts already flagged as spammers elsewhere, so known bad actors can be blocked immediately without waiting for them to fail a captcha. New members who are not already flagged still go through the standard verification step.
This global-blacklist approach is similar in spirit to Combot's CAS system, though it is offered here as part of a lightweight, single-purpose bot rather than a full moderation suite — expect entry protection only, not ongoing content moderation.
How to start
- Add the bot to the group as admin
- Known spammers are blocked automatically on join
- Other new members go through the captcha
Pricing and limits
Free
Pros / Cons
- Blocks known repeat offenders instantly
- Free
- Entry-only, no ongoing content moderation
- No public bio detailing the database source
Alternatives
Read next
Score breakdown
| Criterion | Weight | Points | |
|---|---|---|---|
| Functionality | 25 | 6 / 10 | |
| Reliability & speed | 15 | 6 / 10 | |
| Popularity & trust | 15 | 5 / 10 | |
| Price & free tier | 10 | 10 / 10 | |
| Usability | 10 | 6 / 10 | |
| Safety & privacy | 10 | 7 / 10 | |
| Freshness | 5 | 5 / 10 | |
| Localization | 5 | 10 / 10 | |
| No intrusive ads | 5 | 9 / 10 | |
| Score | 100 | 66.5 |
FAQ
What happens to members not in the spam database?
They go through the standard captcha challenge like any new member.
Technical details
- Inline mode
- Mini App
- Works in groups
- Works in channels
- Accepts voice
- Accepts files
- Requires phone number
- Requires registration
- Shows ads
