Best Arena (formerly Chatbot Arena) Alternatives in 2026

Updated October 2026

20 apps from LLM evaluation tools ranked against Arena (formerly Chatbot Arena) on the same published basis.

1
Promptfoo Free plan apiLinuxMacself-hostedWeb Free7.3
Arena (formerly Chatbot Arena) vs Promptfoo
2
DeepEval Free plan LinuxMacself-hostedWin Free7.2
Arena (formerly Chatbot Arena) vs DeepEval
3
Giskard Free plan apiLinuxself-hostedWeb Free7.1
Arena (formerly Chatbot Arena) vs Giskard
4
Whisper Free plan LinuxMacself-hostedWin Free7.1
Arena (formerly Chatbot Arena) vs Whisper
5
Confident AI Free plan apiself-hostedWeb $200/mo7.0
Arena (formerly Chatbot Arena) vs Confident AI
6
Galileo Free plan apiself-hostedWeb $100/mo7.0
Arena (formerly Chatbot Arena) vs Galileo
7
garak Free plan LinuxMacself-hostedWin Free7.0
Arena (formerly Chatbot Arena) vs garak
8
HELM Free plan apiself-hostedWeb Free7.0
Arena (formerly Chatbot Arena) vs HELM
9
Maxim AI Free plan apiself-hostedWeb $29/mo7.0
Arena (formerly Chatbot Arena) vs Maxim AI
11
Braintrust Free plan apiself-hostedWeb $249/mo6.9
Arena (formerly Chatbot Arena) vs Braintrust
12
CloudSploit Free plan Linuxself-hostedWeb Free6.9
Arena (formerly Chatbot Arena) vs CloudSploit
13
OpenCompass Free plan apiLinuxself-hosted Free6.9
Arena (formerly Chatbot Arena) vs OpenCompass
14
Parea AI Free plan apiself-hostedWeb $150/mo6.9
Arena (formerly Chatbot Arena) vs Parea AI
15
PyRIT Free plan apiLinuxself-hostedWeb Free6.9
Arena (formerly Chatbot Arena) vs PyRIT
16
LiveBench LinuxMacself-hostedWebWin 6.8
Arena (formerly Chatbot Arena) vs LiveBench
17
LM Evaluation Harness Free plan apiLinuxself-hosted Free6.8
Arena (formerly Chatbot Arena) vs LM Evaluation Harness
18
SWE-bench apiLinuxMacself-hostedWeb 6.8
Arena (formerly Chatbot Arena) vs SWE-bench
19
TruLens Free plan apiself-hosted Free6.7
Arena (formerly Chatbot Arena) vs TruLens
20
Inspect AI Free plan apiextension Free6.6
Arena (formerly Chatbot Arena) vs Inspect AI
21
RAGChecker Free plan self-hosted Free6.6
Arena (formerly Chatbot Arena) vs RAGChecker

Arena (formerly Chatbot Arena) alternatives compared

#	App	Score	Free plan	From	Runs on
1	Promptfoo	7.3	Free plan	Free	API, Linux, Mac, self-hosted, Web, Windows
2	DeepEval	7.2	Free plan	Free	Linux, Mac, self-hosted, Windows
3	Giskard	7.1	Free plan	Free	API, Linux, self-hosted, Web
4	Whisper	7.1	Free plan	Free	Linux, Mac, self-hosted, Windows
5	Confident AI	7.0	Free plan	$200/mo	API, self-hosted, Web
6	Galileo	7.0	Free plan	$100/mo	API, self-hosted, Web
7	garak	7.0	Free plan	Free	Linux, Mac, self-hosted, Windows
8	HELM	7.0	Free plan	Free	API, self-hosted, Web
9	Maxim AI	7.0	Free plan	$29/mo	API, self-hosted, Web
11	Braintrust	6.9	Free plan	$249/mo	API, self-hosted, Web
12	CloudSploit	6.9	Free plan	Free	Linux, self-hosted, Web
13	OpenCompass	6.9	Free plan	Free	API, Linux, self-hosted
14	Parea AI	6.9	Free plan	$150/mo	API, self-hosted, Web
15	PyRIT	6.9	Free plan	Free	API, Linux, self-hosted, Web
16	LiveBench	6.8			Linux, Mac, self-hosted, Web, Windows
17	LM Evaluation Harness	6.8	Free plan	Free	API, Linux, self-hosted
18	SWE-bench	6.8			API, Linux, Mac, self-hosted, Web, Windows
19	TruLens	6.7	Free plan	Free	API, self-hosted
20	Inspect AI	6.6	Free plan	Free	API, Browser
21	RAGChecker	6.6	Free plan	Free	self-hosted

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Questions about Arena (formerly Chatbot Arena) alternatives

What is the best alternative to Arena (formerly Chatbot Arena)?

Promptfoo, number 1 in LLM evaluation tools with a score of 7.3 out of 10. The others here: DeepEval, Giskard, Whisper and 16 more.

What is the best free alternative to Arena (formerly Chatbot Arena)?

Promptfoo is the best-ranked alternative with a free plan. 18 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.