Arize Phoenix vs Humanloop
No clear leader: Humanloop (55.9) and Arize Phoenix (53.7) are within the 5-point margin; treat as a tie. 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
A self-hosted platform that traces and evaluates language model application behavior using OpenTelemetry instrumentation, enabling teams to debug, optimize, and monitor LLM performance.
Humanloop
An enterprise platform that helps teams evaluate language model performance, manage and version prompts, and monitor AI systems in production.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Humanloop
Free trial. Monthly billing with no long-term commitment for standard plans; annual billing available for enterprise.
- Free TrialFree
- EnterpriseContact sales
- SSO + SAML
- Role-based access controls
- Hands-on support with SLA
- VPC deployment add-on
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.
- OpenAI
- Anthropic
Arize Phoenix
- LlamaIndex
- AWS Bedrock
- Vertex AI
- Claude Code
- Cursor
- OpenLLMetry
- OpenTelemetry
- OpenInference
- Gemini
- Google Vertex AI
- Google Gemini
- Together AI
- Fireworks
- NVIDIA NIM
- LiteLLM
- LangChain
- Traceloop
Humanloop
- Git
- CI/CD pipelines
- Vercel AI SDK
- CI/CD
Arize Phoenix or Humanloop: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.