Arena (formerly Chatbot Arena) vs Braintrust
| Arena (formerly Chatbot Arena) | Braintrust | |
|---|---|---|
| Free plan | No | Yes |
| Free trial | No | No |
| Paid from | — | $249/mo |
| Open source | No | No |
| Platforms | Web | api, self-hosted, Web |
| Free plan | Yes | Yes |
| Deployment options | cloud | both |
| Safety evaluations | Yes | Yes |
| Human review workflows | Yes | Yes |
| Paid from | — | 249 /mo |
| Custom metrics | — | Yes |
| LLM-as-a-judge | — | Yes |
| Prompt versioning | — | Yes |
| CI/CD integration | — | Yes |
Both are listed in Best LLM Evaluation Tools. On Samsung Mobile US Press, Braintrust scores higher on our published basis.