Defend AI is a runtime security platform for agentic AI applications that provides real-time guardrails and threat detection. The product inspects prompts, reasoning steps, and tool calls to identify and block threats during production runtime. The platform detects and prevents prompt injection attacks, data leakage and exfiltration, agent manipulation, hallucinations, harmful content generation, toxic output, and policy violations. It monitors user-to-model and model-to-tool interactions to provide visibility into the complete chain of AI application behavior. Defend AI supports multimodal threat detection across text, code, images, PDFs, and Microsoft Office documents. The system includes multi-language natural language processing capabilities for Korean, Vietnamese, Chinese, and Japanese. The platform deploys via API, SDK, log forwarder, or AI sensor integration with one-line installation. It uses a compact inference engine designed to deliver subsecond detection and blocking decisions that scale automatically without requiring infrastructure changes or application refactoring. The product includes built-in privacy-preserving guardrails that can be customized to organizational policies. It provides continuous observability through dashboards, audit logs, and forensic capabilities for root-cause analysis. Alert notifications are delivered through Slack, email, or webhook integrations. Defend AI uses self-learning models that adapt to application behavior patterns to reduce false positives and improve detection accuracy over time. The platform is designed for organizations deploying AI agents, chatbots, and LLM-based applications in production environments.