Arize Phoenix vs Opik
No leader: the top candidate Arize Phoenix has only 0.18 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for llm observability. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Arize Phoenix
Phoenix provides OpenTelemetry-based instrumentation for LLM applications, AI-powered evaluation of model outputs and retrieval quality, and systematic prompt management with versioning. It supports both self-hosted and cloud deployment and integrates with major LLM frameworks and development tools.
Opik
A platform that tracks AI agent execution steps and automatically evaluates their performance to identify and resolve issues during development and in production environments.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Arize Phoenix
Pricing not documented yet.
Opik
Open-source core is free to self-host. Managed cloud version includes free tier; enterprise plans available.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
Arize Phoenix
- LlamaIndex
- OpenAI
- Anthropic
- AWS Bedrock
- Vertex AI
- Claude Code
- Cursor
- OpenLLMetry
Opik
- OpenTelemetry
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.