WhyLabs vs OpenLLMetry
Side-by-side from the Top 11 ranking of LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked. Last verified May 31, 2026.
The short answer
WhyLabs ranks higher on Top 11 (#5 vs #11) for AI/ML engineers debugging production LLM apps. A mature, data-first monitoring platform built on the popular open-source whylogs library.
At a glance
| WhyLabs | OpenLLMetry | |
|---|---|---|
| Top 11 rank | #5 / LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked | #11 / LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked |
| Score (out of 9.4) | 8.4 | 7.1 |
| Best for | Data drift and quality monitoring | Open source, OpenTelemetry-native tracing |
| Pricing | $$$ ($500 to $2,500/mo) | $ (Free) |
| HQ | Seattle, USA | Open Source |
| Founded | 2019 | 2023 |
WhyLabs
A mature, data-first monitoring platform built on the popular open-source whylogs library.
whylabs.ai/See full entry in LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked
OpenLLMetry
A vendor-agnostic, open-source standard for adding LLM signals to OpenTelemetry traces.
github.com/traceloop/openllmetrySee full entry in LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.