Last updated 06-28-2026
Category:
Reviews:
Join thousands of AI enthusiasts in the World of AI!
Fiddler AI
Fiddler AI is an enterprise platform for observability, guardrails, and governance across AI agents and machine learning models. It gives teams visibility into agent behavior, enforces safety policies at runtime, and supports compliance for regulated industries. Customers include Mastercard, Nielsen, the U.S. Navy, and other Fortune 500 organizations running compound AI in production.
The platform centers on what Fiddler calls the Control Plane for AI Agents: standardized telemetry, continuous evaluation, inline policy enforcement, and auditable governance across the agentic lifecycle. Fiddler Centor Models run evaluations and guardrails inside your own environment, so traces are scored without routing data through external LLM APIs.
ML engineers, AI platform teams, and compliance officers use Fiddler to test agents before launch, catch drift and hallucinations in production, and generate audit trails aligned with frameworks like GDPR, HIPAA, and financial regulations. The company was founded to bring explainability and trust to ML, and has expanded from model monitoring into full agentic observability and security.
Inline guardrails enforce policies in under 80ms on every request and response
Centor Models score traces inside your VPC with zero data egress
100+ metrics cover hallucination, toxicity, PII/PHI, drift, and business KPIs
Native OpenTelemetry with LangGraph, Amazon Bedrock, and AWS Strands Agents
Fleet dashboards break down token spend by developer, model, and team
Deploy as SaaS, VPC, on-premises, or air-gapped environments
Free tier catches jailbreaks, prompt injection, and toxic content in real time
Free tier offers real-time guardrails with sub-100ms latency at no cost.
Developer plan charges $0.002 per trace with no subscription minimum listed.
Centor Models run in-environment so evaluation data never leaves your infrastructure.
Named in Gartner's AI Evaluation and Observability Platforms market guide.
Flexible deployment across SaaS, VPC, on-prem, and air-gapped setups.
SOC 2 Type II and HIPAA compliance for regulated enterprise workloads.
Enterprise tier requires contacting sales with no public pricing.
Full observability and governance features sit behind paid Developer and Enterprise plans.
Production observability starts with a demo request rather than instant self-serve signup.
Does Fiddler AI have a free plan?
Yes. Fiddler AI offers a Free plan with real-time guardrails to detect harmful exposure. It protects against hallucinations, toxicity, PII/PHI, prompt injection, and jailbreak attempts with latency under 100ms, powered by Fiddler Centor Models. You can run free guardrails at fiddler.ai/free-guardrails.
How much does Fiddler AI cost?
Fiddler AI has three tiers. The Free plan costs nothing. The Developer plan charges $0.002 per trace and adds unified observability, custom evaluators, RBAC, SSO, and SaaS deployment. Enterprise pricing requires contacting sales and includes flexible deployment, enterprise-grade guardrails, and dedicated customer success.
What does Fiddler Guardrails protect against?
Fiddler Guardrails evaluates every agent and LLM input and output against safety, security, privacy, and accuracy policies. It blocks jailbreaks, toxic content, PII/PHI leaks across 35+ entity types, prompt injection, and unfaithful responses. Policies enforce at runtime in under 80ms using Fiddler Centor Models running in your environment.
What deployment options does Fiddler AI support?
Fiddler AI supports cloud SaaS deployment on the Developer tier. Enterprise customers can deploy in a virtual private cloud (VPC), on-premises, or in air-gapped environments. Centor Models run inside your infrastructure so evaluation data does not leave your boundaries.
Is Fiddler AI SOC 2 certified?
Yes. Fiddler AI holds SOC 2 Type II certification covering security, confidentiality, and availability, audited annually. The company is also HIPAA compliant for healthcare workloads involving protected health information (PHI). SOC 2 reports are available upon request with a signed NDA.
What frameworks does Fiddler AI integrate with?
Fiddler AI integrates with LangGraph, Amazon Bedrock, AWS Strands Agents, and NVIDIA NeMo Guardrails. It exports OpenTelemetry traces for interoperability and supports custom evaluators plus external judges from OpenAI, Anthropic, and other providers on paid tiers.
What is the Fiddler AI Control Plane?
The Fiddler AI Control Plane is the system of trust for enterprise agents. It combines standard telemetry, reliable evaluation, continuous monitoring, enforceable policy via inline guardrails, and auditable governance across the agent lifecycle. For coding agents, it integrates with the LLM gateway you already run to catch PII, PHI, and secrets before they reach models or developers.