Holistic AI is an enterprise AI governance platform that unifies discovery, testing, monitoring, and compliance across the full AI lifecycle. It enables organizations to automatically discover and inventory all AI systems, assess technical and regulatory risks, measure AI trustworthiness across five dimensions (bias, explainability, robustness, security, and efficacy), and enforce guardrails while maintaining compliance with evolving AI regulations. The platform includes an open-source library for bias measurement and mitigation, an LLM Decision Hub for model evaluation, and AI Tracker for real-time regulatory monitoring.