Best OpenLLMetry Alternatives in 2026

Updated October 2026

20 apps from LLM observability tools ranked against OpenLLMetry on the same published basis.

1
W&B Weave Free plan apiLinuxMacself-hostedWeb $60/mo7.4
OpenLLMetry vs W&B Weave
2
Evidently AI Free plan apiLinuxMacself-hostedWeb $80/mo7.3
OpenLLMetry vs Evidently AI
3
OpenLIT Free plan apiLinuxMacself-hostedWeb Free7.3
OpenLLMetry vs OpenLIT
4
Promptfoo Free plan apiLinuxMacself-hostedWeb Free7.2
OpenLLMetry vs Promptfoo
5
LangWatch Free plan apiLinuxself-hostedWeb €29/mo7.1
OpenLLMetry vs LangWatch
6
Opik Free plan apiLinuxself-hostedWeb $19/mo7.1
OpenLLMetry vs Opik
7
Giskard Free plan apiLinuxself-hostedWeb Free7.0
OpenLLMetry vs Giskard
8
Langfuse Free plan apiself-hostedWeb $29/mo7.0
OpenLLMetry vs Langfuse
9
Arize AX Free plan apiself-hostedWeb $50/mo6.9
OpenLLMetry vs Arize AX
10
Arize Phoenix Free plan apiself-hostedWeb Free6.9
OpenLLMetry vs Arize Phoenix
11
Confident AI Free plan apiself-hostedWeb $200/mo6.9
OpenLLMetry vs Confident AI
12
Fiddler AI Free plan apiself-hostedWeb Free6.9
OpenLLMetry vs Fiddler AI
13
Galileo Free plan apiself-hostedWeb $100/mo6.9
OpenLLMetry vs Galileo
14
Helicone Free plan apiself-hostedWeb $79/mo6.9
OpenLLMetry vs Helicone
15
Laminar Free plan apiself-hostedWeb $30/mo6.9
OpenLLMetry vs Laminar
16
LangSmith Free plan apiself-hostedWeb $39/mo6.9
OpenLLMetry vs LangSmith
17
Maxim AI Free plan apiself-hostedWeb $29/mo6.9
OpenLLMetry vs Maxim AI
18
Respan (formerly Keywords AI) Free plan apiself-hostedWeb $16.58/mo6.9
OpenLLMetry vs Respan (formerly Keywords AI)
19
Braintrust Free plan apiself-hostedWeb $249/mo6.8
OpenLLMetry vs Braintrust
20
Parea AI Free plan apiself-hostedWeb $150/mo6.8
OpenLLMetry vs Parea AI

OpenLLMetry alternatives compared

#	App	Score	Free plan	From	Runs on
1	W&B Weave	7.4	Free plan	$60/mo	API, Linux, Mac, self-hosted, Web, Windows
2	Evidently AI	7.3	Free plan	$80/mo	API, Linux, Mac, self-hosted, Web, Windows
3	OpenLIT	7.3	Free plan	Free	API, Linux, Mac, self-hosted, Web, Windows
4	Promptfoo	7.2	Free plan	Free	API, Linux, Mac, self-hosted, Web, Windows
5	LangWatch	7.1	Free plan	€29/mo	API, Linux, self-hosted, Web
6	Opik	7.1	Free plan	$19/mo	API, Linux, self-hosted, Web
7	Giskard	7.0	Free plan	Free	API, Linux, self-hosted, Web
8	Langfuse	7.0	Free plan	$29/mo	API, self-hosted, Web
9	Arize AX	6.9	Free plan	$50/mo	API, self-hosted, Web
10	Arize Phoenix	6.9	Free plan	Free	API, self-hosted, Web
11	Confident AI	6.9	Free plan	$200/mo	API, self-hosted, Web
12	Fiddler AI	6.9	Free plan	Free	API, self-hosted, Web
13	Galileo	6.9	Free plan	$100/mo	API, self-hosted, Web
14	Helicone	6.9	Free plan	$79/mo	API, self-hosted, Web
15	Laminar	6.9	Free plan	$30/mo	API, self-hosted, Web
16	LangSmith	6.9	Free plan	$39/mo	API, self-hosted, Web
17	Maxim AI	6.9	Free plan	$29/mo	API, self-hosted, Web
18	Respan (formerly Keywords AI)	6.9	Free plan	$16.58/mo	API, self-hosted, Web
19	Braintrust	6.8	Free plan	$249/mo	API, self-hosted, Web
20	Parea AI	6.8	Free plan	$150/mo	API, self-hosted, Web

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Questions about OpenLLMetry alternatives

What is the best alternative to OpenLLMetry?

W&B Weave, number 1 in LLM observability tools with a score of 7.4 out of 10. The others here: Evidently AI, OpenLIT, Promptfoo and 16 more.

What is the best free alternative to OpenLLMetry?

W&B Weave 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.