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Arize Phoenix vs Opik

Arize Phoenix

6.3#10 in machine learning model monitoring softwareFree plan
Free planWebAPISelf-hosted
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Opik logo

Opik

8.4#1 in mlops platformsFrom $19 a month
Free planWebAPILinuxmacOS
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What both publish

FactArize PhoenixOpik
IntegrationsDocumented integrations include frameworks and providers such as LlamaIndex, LangChain, DSPy, OpenAI, Bedrock, and Anthropic.The integration catalog covers TypeScript, Python, Java, .NET and Ruby ecosystems plus no-code tools and OpenTelemetry.
LicenseThe Phoenix page describes the project as ELv2 licensed.The repository and full platform are released under the Apache-2.0 license.
PurposePhoenix helps teams trace, evaluate, debug, and improve AI applications.Opik logs agent actions and provides automated evaluation workflows to find and fix errors across development, testing, and production.
SupportThe Phoenix documentation points users to a Slack community for questions and developer discussion.The pricing page lists community and self-service support across plans, email support for Pro and Enterprise, and dedicated support and SLAs for Enterprise.
TracingIt captures model calls, retrieval, tool use, and custom logic in traces that can be sent over OpenTelemetry.The platform captures and visualizes multi-step agent execution, including LLM calls, tools and retrieval steps.

Arize Phoenix plans

  • PhoenixFree

Opik plans

  • Free CloudFree
  • Open SourceFree
  • Pro Cloud$19 a month
  • EnterprisePriced on request

Pick Arize Phoenix if…

Phoenix suits teams building AI applications who need to inspect traces, evaluate outputs, and compare application versions. It offers local and self-hosted deployment for teams managing their own trace data.

Pick Opik if…

Opik is for teams building LLM applications or agents that need tracing, evaluation, and production monitoring. Its free plans are described as suitable for development and testing.

Charts they share