Tool

Arize Phoenix

Open-source AI observability and evaluation tool built on OpenTelemetry for tracing, debugging, and scoring LLM applications.

Our Take

Arize Phoenix ships with pre-built evaluation templates for hallucination detection and RAG faithfulness scoring, reducing the setup time for teams adopting structured eval workflows. It uses the OpenInference instrumentation standard and includes a prompt playground for rapid iteration. Phoenix is fully open-source and backed by Arize AI, making it accessible for teams that want production-grade observability without a paid tier.

Pricing

Free

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