Arize Phoenix vs Rhesis AI

Arize Phoenix

7.2 #23 in AI Agent Observability Tools

About Arize Phoenix

Rhesis AI

7.3 #13 in AI LLM Evaluation Tools

About Rhesis AI
Arize PhoenixRhesis AI
Free planYesYes
Free trialNoNo
Paid fromFreeFree
Open sourceNoNo
Platformsapi, self-hosted, Webapi, Linux, self-hosted, Web
Free planYesYes
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

Both are listed in Best AI LLM Evaluation Tools. On Inferse, Rhesis AI scores higher on our published basis.