Rhesis AI vs Vellum
| Rhesis AI | Vellum | |
|---|---|---|
| Free plan | Yes | Yes |
| Free trial | No | No |
| Paid from | Free | $30/mo |
| Open source | No | No |
| Platforms | api, Linux, self-hosted, Web | Android, extension, iOS, macOS, self-hosted, Web, Windows |
| Free plan | Yes | Yes |
| Evaluation methods | offline evaluation, online trace metrics, LLM-as-a-judge, custom metrics, single-turn testing, multi-turn testing, adversarial red-teaming | — |
| Model support | OpenAI, Anthropic, Google Gemini, Azure OpenAI, Mistral, Cohere, Groq, Together AI, Perplexity, Replicate, Ollama, vLLM, LiteLLM Proxy | — |
| Safety evaluations | Yes | — |
| API access | Yes | Yes |
| Paid from | — | 30 /mo |
Both are listed in Best AI LLM Evaluation Tools. On Samsung Mobile US Press, Vellum scores higher on our published basis.