Best OpenLLMetry Alternatives in 2026
Updated
20 apps from LLM observability tools ranked against OpenLLMetry on the same published basis.
- 1OpenLLMetry vs Arize AX
- 2OpenLLMetry vs Langfuse
- 3OpenLLMetry vs Opik
- 4OpenLLMetry vs W&B Weave
- 5OpenLLMetry vs Laminar
- 6OpenLLMetry vs Helicone
- 7OpenLLMetry vs OpenLIT
- 8OpenLLMetry vs Arize Phoenix
- 9OpenLLMetry vs Evidently AI
- 10OpenLLMetry vs LangSmith
- 11OpenLLMetry vs Galileo
- 12OpenLLMetry vs LangWatch
- 13OpenLLMetry vs Maxim AI
- 14OpenLLMetry vs Promptfoo
- 15OpenLLMetry vs Fiddler AI
- 16OpenLLMetry vs Giskard
- 17OpenLLMetry vs Confident AI
- 18OpenLLMetry vs Respan (formerly Keywords AI)
- 19OpenLLMetry vs HoneyHive
- 20OpenLLMetry vs AgentOps
OpenLLMetry alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Arize AX | 8.2 | Free plan | $50/mo | API, self-hosted, Web |
| 2 | Langfuse | 8.2 | Free plan | $29/mo | API, self-hosted, Web |
| 3 | Opik | 8.0 | Free plan | $19/mo | API, Linux, self-hosted, Web |
| 4 | W&B Weave | 7.9 | Free plan | $60/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 5 | Laminar | 7.6 | Free plan | $30/mo | API, self-hosted, Web |
| 6 | Helicone | 7.5 | Free plan | $79/mo | API, self-hosted, Web |
| 7 | OpenLIT | 7.3 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 8 | Arize Phoenix | 7.1 | No | — | Web |
| 9 | Evidently AI | 7.0 | Free plan | $80/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 10 | LangSmith | 6.9 | Free plan | $39/mo | API, self-hosted, Web |
| 11 | Galileo | 6.9 | Free plan | $100/mo | API, self-hosted, Web |
| 12 | LangWatch | 6.8 | Free plan | €29/mo | API, Linux, self-hosted, Web |
| 13 | Maxim AI | 6.8 | Free plan | $29/mo | API, self-hosted, Web |
| 14 | Promptfoo | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 15 | Fiddler AI | 6.5 | No | — | Web |
| 16 | Giskard | 6.5 | Free plan | Free | API, Linux, self-hosted, Web |
| 17 | Confident AI | 6.4 | Free plan | $200/mo | API, self-hosted, Web |
| 18 | Respan (formerly Keywords AI) | 6.4 | Free plan | $16.58/mo | API, self-hosted, Web |
| 19 | HoneyHive | 6.3 | No | — | Web |
| 20 | AgentOps | 6.2 | No | — | Web |
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Questions about OpenLLMetry alternatives
What is the best alternative to OpenLLMetry?
Arize AX, number 1 in LLM observability tools with a score of 8.2 out of 10. The others here: Langfuse, Opik, W&B Weave and 16 more.
What is the best free alternative to OpenLLMetry?
Arize AX is the best-ranked alternative with a free plan. 16 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation.