draupnir

As an all-in-one moderation tool, it can protect your server from malicious invites, spam messages, and whatever else you don't want. In addition to server-level protection, Draupnir is great for communities wanting to protect their rooms without having to use their personal accounts for moderation. The bot by default includes support for bans, redactions, anti-spam, server ACLs, room directory changes, room alias transfers, account deactivation, room shutdown, and more. A Synapse module is also available to apply the same rulesets the bot uses across an entire homeserver.