No single biometric signal is enough as AI-generated faces, voices and documents force fraud detection toward layered, multimodal defenses. Polygraf AI has launched Meeting Guard – a product that, according to a release, delivers real-time AI fraud detection and data governance for enterprise virtual meetings across Zoom, Google Meet, and Microsoft Teams. Meeting Guard joins virtual meetings as a visible participant, and serves as “both a secure compliance assistant and an AI notetaker, detecting AI-generated content, verifying voices against deepfake threats, flagging potential PII leaks, and securely generating meeting notes and summaries without transmitting external data.”