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Fiddler AI
Enterprise AI observability vendor from the ML-monitoring era, now offering LLM scoring, guardrails and bias/fairness auditing.
| Category | Observability & Tracing |
| OpenTelemetry-native | Yes — no proprietary-SDK lock-in |
| Open source | No |
| Self-hostable | Yes |
| Pricing model | enterprise |
| Pricing notes | Enterprise custom pricing; Trust Service / Guardrails sold as platform modules |
| Framework integrations | openai-sdk, amazon-bedrock, langchain |
| Funding / ownership | ~$68M raised (Series B + extensions) |
Pricing/feature source: https://www.fiddler.ai/llmops
Frequently asked questions
Is Fiddler AI open source?
No — Fiddler AI is a proprietary/commercial product.
Can I self-host Fiddler AI?
Yes — Fiddler AI can run in your own infrastructure.
Is Fiddler AI OpenTelemetry-native?
Yes — Fiddler AI speaks OpenTelemetry (OTLP) natively, so there is no proprietary-SDK lock-in.
How much does Fiddler AI cost?
Enterprise. Enterprise custom pricing; Trust Service / Guardrails sold as platform modules