Best Fiddler AI Alternatives in 2026
Updated
20 apps from AI agent observability tools ranked against Fiddler AI on the same published basis.
- 1Fiddler AI vs PetalTrace
- 2Fiddler AI vs OpenLIT
- 3Fiddler AI vs W&B Weave
- 4Fiddler AI vs SigNoz
- 5Fiddler AI vs Opik
- 6Fiddler AI vs Agenta
- 7Fiddler AI vs Langfuse
- 8Fiddler AI vs LangWatch
- 9Fiddler AI vs Traccia
- 10Fiddler AI vs TraceRoot
- 11Fiddler AI vs VoltOps
- 12Fiddler AI vs Arize AX
- 13Fiddler AI vs Braintrust
- 15Fiddler AI vs Galileo
- 16Fiddler AI vs Helicone
- 17Fiddler AI vs Laminar
- 18Fiddler AI vs LangSmith
- 19Fiddler AI vs LogicGaze
- 20Fiddler AI vs Maxim AI
- 21Fiddler AI vs MLflow Tracing
Fiddler AI alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | PetalTrace | 7.4 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | OpenLIT | 7.2 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 3 | W&B Weave | 7.2 | Free plan | $60/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 4 | SigNoz | 7.1 | Free plan | $19/mo | Android, API, iOS, self-hosted, Web |
| 5 | Opik | 7.0 | Free plan | $19/mo | API, Linux, self-hosted, Web |
| 6 | Agenta | 6.9 | Free plan | $29/mo | API, self-hosted, Web |
| 7 | Langfuse | 6.9 | Free plan | $29/mo | API, self-hosted, Web |
| 8 | LangWatch | 6.9 | Free plan | €29/mo | API, Linux, self-hosted, Web |
| 9 | Traccia | 6.9 | Free plan | $99/mo | API, Web |
| 10 | TraceRoot | 6.9 | Free plan | $30/mo | Web |
| 11 | VoltOps | 6.9 | Free plan | $50/mo | API, self-hosted, Web |
| 12 | Arize AX | 6.8 | Free plan | $50/mo | API, self-hosted, Web |
| 13 | Braintrust | 6.8 | Free plan | $249/mo | API, self-hosted, Web |
| 15 | Galileo | 6.8 | Free plan | $100/mo | API, self-hosted, Web |
| 16 | Helicone | 6.8 | Free plan | $79/mo | API, self-hosted, Web |
| 17 | Laminar | 6.8 | Free plan | $30/mo | API, self-hosted, Web |
| 18 | LangSmith | 6.8 | Free plan | $39/mo | API, self-hosted, Web |
| 19 | LogicGaze | 6.8 | Free plan | Free | API, self-hosted, Web |
| 20 | Maxim AI | 6.8 | Free plan | $29/mo | API, self-hosted, Web |
| 21 | MLflow Tracing | 6.8 | Free plan | Free | API, self-hosted, Web |
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Questions about Fiddler AI alternatives
What is the best alternative to Fiddler AI?
PetalTrace, number 1 in AI agent observability tools with a score of 7.4 out of 10. The others here: OpenLIT, W&B Weave, SigNoz and 16 more.
What is the best free alternative to Fiddler AI?
PetalTrace is the best-ranked alternative with a free plan. 20 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes: documentation depth, a free tier and the platforms it runs on.