Arize Phoenix
Open-source AI observability tool with interactive tracing and RAG evaluation
Why choose Arize Phoenix
Arize Phoenix is an open-source AI observability tool focused on LLM applications and AI agents. It provides interactive visualizations for tracing agent runs, evaluating response quality, detecting hallucinations, and analyzing RAG pipeline performance — all in a local or cloud-hosted environment.
- Great visual trace exploration
- Strong RAG evaluation
- Open-source and self-hosted
- Active development
Where it falls short
- More setup than SaaS options
- Advanced features require Arize platform
- Steeper learning curve
Best for these users
Pricing overview
Open-source self-hosted is free. Arize AX cloud platform with custom pricing.
Check current pricing →Key features
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The verdict
Arize Phoenix is a solid choice for ml engineers who need great visual trace exploration. At freemium, it delivers good value. Main caveat: more setup than saas options. Compare with alternatives before committing.