What are the best observability tools for AI agents?
Asked "What are the best observability tools for AI agents?", Google AI Mode, ChatGPT, Gemini, Copilot and Perplexity named 23 distinct tools across 15 answers on September 7, 2026, and 20 of them in two or more answers.
20 of 23 names confirmed · named in 2 or more of 15 answers · asked September 7, 2026 · 5 engines
The best observability tools for AI agents include LangSmith, Langfuse, Arize AI/Arize Phoenix, Helicone, Weights & Biases, Galileo, and Portkey, each with their own strengths and use cases. LangSmith is ideal for LangChain users, while Arize AI and Maxim AI are suited for enterprises needing compliance and drift detection. Langfuse and Arize Phoenix are popular choices for open-source and self-hosting needs. Helicone and Portkey are recommended for lightweight monitoring and cost control, and Galileo is focused on reliability and safety guardrails. Weights & Biases is a good option for experiment-heavy workflows.
- 1Langfusenamed in 13 of 15 answers
- 2LangSmithnamed in 12 of 15 answers
- 3Arize Phoenixnamed in 11 of 15 answers
- 4Braintrustnamed in 11 of 15 answers
- 5Heliconenamed in 10 of 15 answers
- 6Datadognamed in 9 of 15 answers
- 7Weights & Biasesnamed in 6 of 15 answers
- 8Arize AInamed in 5 of 15 answers
- 9AgentOpsnamed in 4 of 15 answers
- 10Galileo AInamed in 4 of 15 answers
- 11Maxim AInamed in 3 of 15 answers
- 12MLflownamed in 3 of 15 answers
- 13Galileonamed in 3 of 15 answers
- 14Fiddlernamed in 3 of 15 answers
- 15Arize AXnamed in 2 of 15 answers
- 16IBM Instananamed in 2 of 15 answers
- 17Dynatracenamed in 2 of 15 answers
- 18Fiddler AInamed in 2 of 15 answers
- 19Portkeynamed in 2 of 15 answers
- 20OpenTelemetrynamed in 2 of 15 answers
- 21OpenInferencenamed in 1 of 15 answersone answer
- 22HoneyHivenamed in 1 of 15 answersone answer
- 23Bifrostnamed in 1 of 15 answersone answer
The full measurement
- The position each of the 5 engines gave all 23 names.
- How many of the 15 answers named each of them.
- 150 sampled observations behind this ranking, and where the engines disagree.
- Fan-out — the query each engine actually searched.
- Every citation, and the sources nobody cited.