AutoMod uses machine learning and natural language processing to screen chat messages in real time, flagging potentially inappropriate content for human moderator review before it appears in chat.

Launched December 12, 2016, AutoMod screens messages across four categories — identity-based language, sexual language, aggressive speech, and profanity — at four configurable strictness levels. By May 2017, roughly 20% of all Twitch chat was being screened by AutoMod. The 2.0 update added customizable blocked/permitted word lists and automatic ruleset modifications that learn from moderator approve/deny decisions. AutoMod now supports 17+ languages and is enabled on 82.5% of all channels as of H2 2024.