Fraud Detection
Score whole accounts on thousands of real-time behavioral and content signals.
Whole Accounts
Your model learns from your own team’s decisions, flagging accounts the way your platform defines abuse, not with a shared cross-customer network’s average. It reads thousands of signals per account (behavior, content, connections, device, history, and more) to catch ban evaders, coordinated rings, account takeovers, bots, spam, and scams. Once it knows what a bad account looks like for you, it flags new sign-ups before they ever post.
At Bluesky, accounts Musubi actioned drew 75% fewer user reports, because users never saw the content in the first place.

Matching...
Repeated Messages
Unverified ID
Multiple Accounts, Same Device
Suspicious IP
Risk Score
36
Learning Loop
Every call your moderators make improves your model. It learns from consistent patterns across your whole team rather than any single reviewer on an off day, so our customers see up to 89% fewer false positives and ban appeals than human-only queues.

Adapts Daily
The model retrains every night behind automated quality gates, so the synthetic-ID ring that surfaced yesterday is caught today, not next quarter. When a pattern is high-confidence, matching cases get actioned automatically in around 10 seconds.
For Bluesky, that took median time-to-action from over four hours to under four minutes at 99.8% accuracy and 85% lower cost than human moderation alone.


“Everyone was trying to do AI the exact same way — hey, we can look at one piece of content and make an accurate policy assessment for you. Musubi was literally the only example that I had looked at in which you were doing a whole account assessment.”
Beyond the Score
A suite of tools that keeps you in control and adapting faster than the bad actors do.