I manage your telegram groups. I use TLG_JoinCaptchaBot for captchas.
bot protection: verify new users with captchas, auto kick spamming bots
log protection: let me manage your invitation links; bots can not even join your group
notes: add notes for your user
connect: manage your group settings in private
auto-delete: I do not spam your group, messages are automatically deleted
You probably never saw a log protection like that before(I didnt).
Any usual bot-protection solution verifies “users” after they joined your group. Any bad bot can dump your whole group history before it fails the verification.
This solution verifies users before they can join your group!