ChatKeeperBot

ChatKeeperBot bundles the modules most group admins end up installing separately: spam and flood filters, an entry captcha, configurable welcome messages, warnings and bans, plus a lightweight activity dashboard. Everything is managed through inline menus after you add the bot as admin, so there is little need to memorize commands.

The scale is its main selling point — over half a million admins use it, which suggests the anti-spam heuristics are tuned on a large, diverse dataset of real chats. The trade-off is a fairly generic English-first interface; if your community speaks another language, expect to translate a few menu items for your members yourself. Treat premium-labelled options in the menu as paid extras beyond the core moderation set.