Castle

Castle provides a complete SDK/API suite to monitor users, block bots, and prevent in-app fraud. It emphasizes edge-based and in-app fraud defense with real-time risk scoring and automated rules.

Castle offers dual-layer fraud defense: deploy at the edge to analyze requests and credential stuffing before they reach the backend, and integrate an SDK to monitor sessions, devices, and behavior within the app. It provides behavioral analysis, AI scoring for abuse and account takeover, a real-time rules engine to allow/deny actions, credential stuffing protection, device and email intelligence, and tools for session monitoring, network analysis, and pattern exploration to create risk rules without code changes.

Who it’s for: Businesses seeking to stop bots and account abuse across web and mobile apps, requiring edge and in-app fraud prevention with real-time risk scoring and customizable rules.

Pricing/enterprise contact, mentions of startups and customers, and ongoing feature development implied by SDKs, APIs, and edge deployment