Bluesky uses automated detection systems — including rules engines and machine learning tools — to identify and act on spam networks, fake accounts, and bot behavior in real time across the platform.

Bluesky deployed automated spam detection tools that, by 2024, could process high-certainty spam and bot cases in seconds rather than the 40 minutes previously required by human review. In 2024, automated tooling removed 35,842 accounts for spam and bot behavior. By 2025, Bluesky's automated systems flagged 2.54 million potential violations and the platform's 2025 Transparency Report confirms automated rules engines detect and combat spam in real time. In 2024, Bluesky also began automating detection for additional categories beyond spam, such as impersonation.