Reviewed by the Softwares.com Editorial Team · Last updated June 2026 · How we rate
Key facts
- Vendor
- Arize AI
- Pricing
- Open source — Free – $50/mo
- Free tier
- Yes
- Platforms
- Api, Self Hosted, Web
- Best for
- Developers, Ai Teams
- Editor rating
- 4.4 / 5
- Founded
- 2020
- Headquarters
- Berkeley, USA
What is Arize Phoenix?
Arize Phoenix is a ai machine learning tool from Arize AI. An open-source observability tool for LLM and ML applications offering tracing, evaluation and troubleshooting for agents and RAG pipelines.
Arize Phoenix uses open source pricing and offers a free tier you can start on without a credit card. Free – $50/mo.
It's best suited to developers, ai teams and runs on Api, Self Hosted, Web.
Standout strengths include open source, agent and rag tracing, strong evals. Worth weighing: setup required, cloud tier for teams.
Arize Phoenix pricing
Pros
- Open source
- Agent and RAG tracing
- Strong evals
Cons
- Setup required
- Cloud tier for teams
Arize Phoenix vs alternatives
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Frequently asked questions
What is Arize Phoenix?
An open-source observability tool for LLM and ML applications offering tracing, evaluation and troubleshooting for agents and RAG pipelines.
How much does Arize Phoenix cost?
Arize Phoenix is open-source-priced. It has a free tier. Paid plans start at $50/mo.
Does Arize Phoenix have a free trial?
Arize Phoenix offers a free tier rather than a time-limited trial.
What platforms does Arize Phoenix support?
Arize Phoenix is available on Api, Self Hosted, Web.