Fraud Detection

Custom AI fraud detection, trained on your moderators.

Score whole accounts on thousands of real-time behavioral and content signals.

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Whole Accounts

Catch the actor, not just the action.

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.

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Risk-matching detection of suspicious account signals

Matching...

Repeated Messages

Unverified ID

Multiple Accounts, Same Device

Suspicious IP

Risk Score

36

Learning Loop

Catch more bad actors while flagging fewer good ones.

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.

Musubi's account graph learning from your team to defend against fraud

Adapts Daily

The tactic caught yesterday is automated today.

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.

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Decision outcomes routing flagged content to ban, skip, or approve
Aaron Rodericks
“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.”
Aaron RodericksHead of Trust & Safety, Bluesky

Beyond the Score

Everything you need to stay ahead of fraud.

A suite of tools that keeps you in control and adapting faster than the bad actors do.

Want to see your fraud detection running on your data?