Fiddler Trust Service is a platform designed for monitoring and protecting large language model (LLM) applications in production environments. The service provides guardrails to prevent security issues and ensure safe operation of AI systems. The platform offers observability capabilities for tracking LLM application performance and behavior. It includes monitoring features for detecting anomalies, security threats, and compliance issues in AI deployments. The service supports agentic AI systems with end-to-end visibility and control throughout the agentic lifecycle. Fiddler Trust Service includes purpose-built trust models that operate within customer environments for evaluation and guardrails implementation. The platform addresses AI governance, risk management, and compliance requirements for enterprise deployments. It provides capabilities for bias mitigation and responsible AI practices. The service is designed to work with various AI infrastructure platforms and can be deployed across cloud environments. It supports both traditional machine learning operations and newer agentic AI workflows. The platform includes features for testing, observing, protecting, and governing AI systems at enterprise scale. Organizations use Fiddler Trust Service to maintain security, scalability, and cost-efficiency for their production LLM applications across industries including government, healthcare, insurance, and financial services.