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Fiddler AI

Platform

by Fiddler AI

AI observability platform: evaluation, monitoring and real-time guardrails for ML models and generative AI/agentic applications in production.

Find alternatives to Fiddler AI

Free $0 (real-time guardrails only); Developer $0.002 per trace; Enterprise custom (full observability, flexible deployment options: SaaS, VPC or on-premise).

What it does

• Evaluation and observability

How it compares

• Arize AX

  Fiddler vs. Arize -- Arize Alternatives

  Official documentation · 19 Sep 2026

Sources

Pricing

Pricing page · 9 Sep 2026

Three named tiers read live: Free $0 (real-time guardrails); Developer $0.002 per trace; Enterprise custom.

Description

Official documentation · 9 Sep 2026

Own About page: evaluation, monitoring and guardrails for ML and generative AI/agentic applications in production.

Sold within

Pricing page · 9 Sep 2026

Bought and metered on its own pricing page -- no parent offering it ships inside.

URL

Official documentation · 9 Sep 2026

Fetched 2026-09-09: markets as an independent AI observability product.

Deployment

Pricing page · 9 Sep 2026

Enterprise tier names "flexible deployment options (SaaS, VPC, or on-premise)" explicitly -- mapped to this site's vocabulary as saas / private-cloud / self-hosted.

Also from Fiddler AI

• Fiddler Auditor Developer tool

  Source-available library for red-teaming and robustness testing of LLMs, run independently of the hosted Fiddler platform. Fiddler's own page calls it "open-source"; its repository's actual licence is the Elastic License 2.0, which is not an OSI-approved open-source licence (it restricts offering the software as a competing hosted service), so it is recorded here by its real terms rather than the vendor's label.

• Fiddler Agentic Observability Application

  Tracing and monitoring module for multi-step agent workflows within the Fiddler AI Control Plane, tracking tool calls, reasoning steps and failures across an agent's execution.

• Fiddler AI Governance, Risk Management, and Compliance Application

  Governance module within the Fiddler AI Control Plane providing model inventories, policy enforcement and audit-ready reporting for regulatory compliance (e.g. EU AI Act) across an organization's AI systems.

• Fiddler Continuous Evaluations Application

  Ongoing automated evaluation module within the Fiddler AI Control Plane that re-scores production LLM/agent outputs against quality and safety metrics over time, not just at launch.

• Fiddler Guardrails Application

  Runtime safety layer within the Fiddler AI Control Plane that screens LLM/agent inputs and outputs for hallucination, toxicity, PII and jailbreak attempts before they reach users.

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