✓ Use when
Mature ML/AI teams running both predictive models and LLM applications who need unified monitoring. Strong for financial services and healthcare.
✗ Avoid when
Pure LLM app teams with no classical ML — Langfuse or Braintrust are more focused.
What is Arize AI?
Arize is the observability platform for both classical ML models and LLM-based agents. Monitor feature drift, data quality, and performance regressions in production. Phoenix (their open-source OpenTelemetry-based LLM tracing library) has become a standard for agent observability. Strong with regulated industries needing model audit trails.
Key features
✓Phoenix open-source LLM tracing (OpenTelemetry)
✓Feature drift and data quality monitoring
✓Agent and RAG evaluation
✓Model performance root-cause analysis
✓Regulated-industry audit trails
Integrations
LangChainLlamaIndexSnowflakeDatabricks
💰 Real-world pricing
What people actually pay
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