Callsign is an identity and authentication solution that provides passive authentication, fraud prevention, and intelligence capabilities. It utilizes behavioral biometrics, device fingerprinting, and AI-driven ensembling technology to verify user identities and detect fraudulent activities. Callsign's platform includes an Intelligence Engine, Orchestration Layer, and Authentication Suite, which work together to create dynamic customer experiences while balancing risk and security. It offers multi-factor authentication options and can integrate with existing infrastructure, either on-premise or in the cloud.