Best OpenCompass Alternatives in 2026

Updated October 2026

20 apps from AI LLM evaluation tools ranked against OpenCompass on the same published basis.

1
Vellum Free plan AndroidextensioniOSMacself-hosted $30/mo7.4
OpenCompass vs Vellum
2
Weights & Biases Free plan apiiOSLinuxMacself-hosted $60/mo7.4
OpenCompass vs Weights & Biases
3
Evidently AI Free plan apiLinuxMacself-hostedWeb $80/mo7.3
OpenCompass vs Evidently AI
4
Promptfoo Free plan apiLinuxMacself-hostedWeb Free7.2
OpenCompass vs Promptfoo
5
DeepEval Free plan LinuxMacself-hostedWin Free7.1
OpenCompass vs DeepEval
6
Giskard Free plan apiLinuxself-hostedWeb Free7.0
OpenCompass vs Giskard
7
Opik Free plan apiLinuxself-hostedWeb $19/mo7.0
OpenCompass vs Opik
8
Rhesis AI Free plan apiLinuxself-hostedWeb Free7.0
OpenCompass vs Rhesis AI
9
Confident AI Free plan apiself-hostedWeb $200/mo6.9
OpenCompass vs Confident AI
10
Galileo Free plan apiself-hostedWeb $100/mo6.9
OpenCompass vs Galileo
11
Langfuse Free plan apiself-hostedWeb $29/mo6.9
OpenCompass vs Langfuse
12
LangWatch Free plan apiLinuxself-hostedWeb €29/mo6.9
OpenCompass vs LangWatch
13
Maxim AI Free plan apiself-hostedWeb $29/mo6.9
OpenCompass vs Maxim AI
14
Braintrust Free plan apiself-hostedWeb $249/mo6.8
OpenCompass vs Braintrust
15
HoneyHive Free plan apiself-hostedWeb Free6.8
OpenCompass vs HoneyHive
16
LangSmith Free plan apiself-hostedWeb $39/mo6.8
OpenCompass vs LangSmith
17
NVIDIA NeMo Evaluator Free plan apiLinuxself-hosted Free6.8
OpenCompass vs NVIDIA NeMo Evaluator
18
Arize Phoenix Free plan apiself-hostedWeb Free6.7
OpenCompass vs Arize Phoenix
19
LM Evaluation Harness Free plan apiLinuxself-hosted Free6.7
OpenCompass vs LM Evaluation Harness
20
RAGChecker Free plan self-hosted Free6.6
OpenCompass vs RAGChecker

OpenCompass alternatives compared

#	App	Score	Free plan	From	Runs on
1	Vellum	7.4	Free plan	$30/mo	Android, Browser, iOS, Mac, self-hosted, Web, Windows
2	Weights & Biases	7.4	Free plan	$60/mo	API, iOS, Linux, Mac, self-hosted, Web, Windows
3	Evidently AI	7.3	Free plan	$80/mo	API, Linux, Mac, self-hosted, Web, Windows
4	Promptfoo	7.2	Free plan	Free	API, Linux, Mac, self-hosted, Web, Windows
5	DeepEval	7.1	Free plan	Free	Linux, Mac, self-hosted, Windows
6	Giskard	7.0	Free plan	Free	API, Linux, self-hosted, Web
7	Opik	7.0	Free plan	$19/mo	API, Linux, self-hosted, Web
8	Rhesis AI	7.0	Free plan	Free	API, Linux, self-hosted, Web
9	Confident AI	6.9	Free plan	$200/mo	API, self-hosted, Web
10	Galileo	6.9	Free plan	$100/mo	API, self-hosted, Web
11	Langfuse	6.9	Free plan	$29/mo	API, self-hosted, Web
12	LangWatch	6.9	Free plan	€29/mo	API, Linux, self-hosted, Web
13	Maxim AI	6.9	Free plan	$29/mo	API, self-hosted, Web
14	Braintrust	6.8	Free plan	$249/mo	API, self-hosted, Web
15	HoneyHive	6.8	Free plan	Free	API, self-hosted, Web
16	LangSmith	6.8	Free plan	$39/mo	API, self-hosted, Web
17	NVIDIA NeMo Evaluator	6.8	Free plan	Free	API, Linux, self-hosted
18	Arize Phoenix	6.7	Free plan	Free	API, self-hosted, Web
19	LM Evaluation Harness	6.7	Free plan	Free	API, Linux, self-hosted
20	RAGChecker	6.6	Free plan	Free	self-hosted

Make your app an alternative to OpenCompass

The sponsored alternative slot on this page is labelled Sponsored.

See the price

Questions about OpenCompass alternatives

What is the best alternative to OpenCompass?

Vellum, number 1 in AI LLM evaluation tools with a score of 7.4 out of 10. The others here: Weights & Biases, Evidently AI, Promptfoo and 16 more.

What is the best free alternative to OpenCompass?

Vellum 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.