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Is the easiest way to holistically deal with the problem of unwanted users. Using device fingerprinting and behavioral biometrics, we help you detect and stop malicious and suspicious users, as well as investigate specific instances of fraud and abuse.


Location:San Francisco,CA, United States
Founded: 2015

Fraud Solution Profile

Stop more fraud with better data. Castle monitors every step of the customer journey to help visualize and proactively block fraud that would otherwise fly under the radar.

Know the fraudster’s next move

Today’s fraud landscape evolves too rapidly to know in advance what you’ll need to track and measure. Castle lets you proactively track and make sense of every single user touchpoint and be ready when fraudsters change strategy, offering a novel approach to dealing with fraud at scale.

Castle offers the fastest time-to-value on the market by offering a 5 minute integration via Segment, or by using the JavaScript snippet or drop-in mobile SDKs. By utilizing the sophisticated querying engine, you will discover hidden user patterns and identify bad actors that managed to evade identity verification. By combining fraud detection, product analytics, and log management in one tool, analysts can work faster without switching between browser tabs.

Enrich every user interaction

Castle analyzes every single user activity down to individual button clicks, and enriches it with device intelligence and behavioral risk scores. Data can be accessed directly in the UI or by API for integration into your risk logic.

All activity is enriched with device fingerprinting, behavioral anomalies, geo and email intelligence, and ML-based risk scores. The analytics dashboard allows you to filter all this data on specific behaviors and anomalies to find linked users, accounts used by several individuals, or anything that seems out of the ordinary.

Automate with confidence

Take a proactive and data-driven approach to fraud management by developing policies based on Castle’s scores and metrics, blend in any custom business logic, and then simulate it all using historical data. Deploy with confidence knowing you can quickly make adjustments without writing code.

Create precise fraud policies based on intelligent data points like AI-based risk scores and device fingerprinting, as well as on your own custom data. Backtest policies on historical data before putting them live. Monitor and iterate until you’ve optimized the user experience. Then instruct your app to verify or block the user in real-time, or kick off operational workflows by subscribing to webhook or Slack notifications. 

Try for free

Castle helps organizations of all sizes uncover fraud in minutes. Try it for 30 days for free without a credit card and then take advantage of our pay-as-you-go pricing to scale up predictably.



Rockstar Games




Ecommerce, Financial Services, Insurance, Telecom
 Primary Functionality
Identity & Authentication
 Fraud Type
Account Takeover, Content Abuse, Loyalty or Promo Abuse, New Account Fraud, Payment Fraud, Synthetic Identity Fraud
Behavioral Biometrics, Biometrics, Machine Learning, Rules Engine