WhyLabs vs Helicone
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 #6) 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 | Helicone | |
|---|---|---|
| Top 11 rank | #5 / LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked | #6 / LangSmith vs Arize AI vs Datadog: 11 Best LLM Observability Platforms 2026 Ranked |
| Score (out of 9.4) | 8.4 | 8.2 |
| Best for | Data drift and quality monitoring | Simple, developer-first API monitoring |
| Pricing | $$$ ($500 to $2,500/mo) | $ ($40 to $200/mo) |
| HQ | Seattle, USA | San Francisco, USA |
| Founded | 2019 | 2022 |
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
Helicone
A simple, elegant API proxy for LLM logging, caching, and analytics with near-zero setup friction.
www.helicone.ai/See 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.