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Fiddler AI vs Opik

Fiddler AIOpik

Bottom line: Fiddler AI for large enterprises; Opik for teams wanting open-source eval plus tracing.

	Fiddler AI Enterprise AI observability and security for LLMs, agents, and ML models Visit	Opik Open-source LLM evaluation, tracing, and observability by Comet. Visit
Votes	0	0
Pricing	Contact	Freemium
Category	Llm Observability	Llm Observability
Tags	ai-observabilityllmopsmodel-monitoringai-securityexplainability	llm-evaluationobservabilityopen-sourcetracingmonitoring
Best for	Large enterprises AI/ML platform teams Regulated industries	Teams wanting open-source eval plus tracing LLM engineers doing eval-driven development Organizations that value self-hostability
Pros	Established pioneer in AI observability Covers both LLMs and classic ML Real-time monitoring and guardrails Model explainability and bias detection Enterprise-grade security safeguards	Full platform is Apache-2.0 and free to self-host Combines tracing and evaluation in one tool LLM-as-a-judge and many automated metrics Fast-growing, widely adopted open-source project Integrates with Comet's ML ecosystem
Cons	Custom, sales-led pricing only No public free tier Enterprise focus excludes small teams Setup and integration effort required Not aimed at quick experiments	Crowded, competitive category Self-hosting requires running infrastructure Managed cloud limits (spans, seats) on lower tiers Evaluation quality depends on judge configuration Deep value tied to adopting the workflow

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