Best Arena (formerly Chatbot Arena) Alternatives in 2026
Updated
20 platforms from LLM evaluation tools ranked against Arena (formerly Chatbot Arena) on the same published basis.
- 1Arena (formerly Chatbot Arena) vs Braintrust
- 2Arena (formerly Chatbot Arena) vs Confident AI
- 3Arena (formerly Chatbot Arena) vs Galileo
- 4Arena (formerly Chatbot Arena) vs Giskard
- 5Arena (formerly Chatbot Arena) vs Maxim AI
- 6Arena (formerly Chatbot Arena) vs Parea AI
- 7Arena (formerly Chatbot Arena) vs Promptfoo
- 8Arena (formerly Chatbot Arena) vs Inspect AI
- 9Arena (formerly Chatbot Arena) vs OpenCompass
- 10Arena (formerly Chatbot Arena) vs TruLens
- 11Arena (formerly Chatbot Arena) vs LM Evaluation Harness
- 12Arena (formerly Chatbot Arena) vs Ragas
- 13Arena (formerly Chatbot Arena) vs DecodingTrust
- 14Arena (formerly Chatbot Arena) vs EvalPlus
- 15Arena (formerly Chatbot Arena) vs DeepEval
- 17Arena (formerly Chatbot Arena) vs CloudSploit
- 18Arena (formerly Chatbot Arena) vs garak
- 19Arena (formerly Chatbot Arena) vs RAGChecker
- 20Arena (formerly Chatbot Arena) vs Whisper
- 21Arena (formerly Chatbot Arena) vs ARES
Arena (formerly Chatbot Arena) alternatives compared
| # | Platform | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Braintrust | 7.4 | Free plan | $249/mo | API, self-hosted, Web |
| 2 | Confident AI | 7.4 | Free plan | $200/mo | API, self-hosted, Web |
| 3 | Galileo | 7.4 | Free plan | $100/mo | API, self-hosted, Web |
| 4 | Giskard | 7.4 | Free plan | Free | API, Linux, self-hosted, Web |
| 5 | Maxim AI | 7.4 | Free plan | $29/mo | API, self-hosted, Web |
| 6 | Parea AI | 7.4 | Free plan | $150/mo | API, self-hosted, Web |
| 7 | Promptfoo | 7.4 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 8 | Inspect AI | 7.3 | Free plan | Free | API, Browser |
| 9 | OpenCompass | 7.3 | Free plan | Free | API, Linux, self-hosted |
| 10 | TruLens | 7.3 | Free plan | Free | API, self-hosted |
| 11 | LM Evaluation Harness | 7.2 | Free plan | Free | API, Linux, self-hosted |
| 12 | Ragas | 7.0 | No | — | API, Linux, self-hosted |
| 13 | DecodingTrust | 6.8 | No | — | API, self-hosted |
| 14 | EvalPlus | 6.8 | No | — | API, Linux, self-hosted |
| 15 | DeepEval | 6.0 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 17 | CloudSploit | 5.9 | Free plan | Free | Linux, self-hosted, Web |
| 18 | garak | 5.9 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 19 | RAGChecker | 5.9 | Free plan | Free | self-hosted |
| 20 | Whisper | 5.9 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 21 | ARES | 5.4 | No | — | Linux, self-hosted |
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Questions about Arena (formerly Chatbot Arena) alternatives
What is the best alternative to Arena (formerly Chatbot Arena)?
Braintrust, number 1 in LLM evaluation tools with a score of 7.4 out of 10. The others here: Confident AI, Galileo, Giskard and 16 more.
What is the best free alternative to Arena (formerly Chatbot Arena)?
Braintrust 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 on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it.