Enterprise data science, security, and trust teams operating ML models and LLM agents in production.

Fiddler is a hosted AI observability and security platform that monitors LLM and ML models for drift, hallucination, toxicity, PII leakage, and prompt injection.

Accessed via Fiddler's cloud dashboard or deployed as an enterprise on-prem/VPC installation.

Operating as an AI observability pioneer since 2018, with agentic observability features expanded through 2026.

It exists to give regulated enterprises real-time risk detection and compliance visibility across their AI systems.

Integrates with major ML platforms and LLM providers via SDK and API instrumentation.

SaaS or enterprise on-prem deployment, proprietary, requires an account; commercial pricing; monitored data can stay on-prem in enterprise deployments or flow to Fiddler's cloud in SaaS mode.