Fiddler AI

Fiddler AI is an AI observability and control platform for enterprises deploying agents and predictive models. It combines evaluations, monitoring, policy enforcement, and governance evidence. Teams can follow system behavior from development through production and connect findings to operational controls.

Key Highlights

• Observability across agent actions and predictive models
• Continuous evaluations, tests, and experiments
• Guardrails for prompt risks and sensitive-data exposure
• Fiddler Centor Models for evaluations and policy enforcement
• Governance records linking decisions to users and actions

What Makes It Different

Fiddler combines seeing an AI system's behavior with enforcing policy in its request and response path. Centor Models provide dedicated evaluation and guardrail capabilities rather than requiring an external general-purpose LLM for every evaluation.

The platform spans agentic and predictive AI. This lets teams assess different types of deployed AI through one operational system, while choosing the controls and deployment model appropriate to each workload.

Features & Capabilities

Monitor agent actions and costs, examine traces, and run evaluations to understand how an application performs. The Developer tier supports custom evaluators and a bring-your-own-judge approach, alongside visualization, access controls, and SaaS deployment.

Guardrails address risks including prompt injection, jailbreak attempts, toxicity, and PII/PHI exposure. Enterprise adds broader infrastructure and deployment options, including SaaS, VPC, and on-premises. Confirm the chosen plan before treating in-environment deployment or enterprise controls as included with entry-level access.

User Ratings and Testimonials

A vendor-published Nielsen testimonial describes observability, protection, and governance as part of its AI strategy. That is a named customer's experience, not an independently established result for every application. Evaluate trace coverage, alert relevance, and guardrail behavior on your own workloads.

Pricing & Value

• Free: Real-time guardrails powered by Centor Models; focused on protective checks.
• Developer: $0.002 per trace, adding unified observability, custom evaluators, access controls, and SaaS deployment.
• Enterprise: Custom commercial terms, with additional guardrails, infrastructure, deployment choices, and support.

Compare billable trace volume with required capabilities. The Free guardrail offering should not be mistaken for unlimited access to every observability or enterprise feature.