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📖 The AI Tool Bible

Arize AI vs LangSmith

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

 Arize AI logo
Arize AI
Evaluation
LangSmith logo
LangSmith
Evaluation
TaglineEnterprise observability and evaluation platform for LLM agents and generative AI applications.LangChain's eval + observability platform.
CategoryEvaluationEvaluation
PricingFreemium· AX Free: Free · AX Pro: $50 · AX Enterprise: CustomFreemium· Developer: $0 · Plus: $39 · Enterprise: Custom pricing
ModelMulti-modelPlatform (any LLM)
Editorial score8.2 / 108.7 / 10
Use cases
llm-observabilityagent-evaluationrag-tracingprompt-testingproduction-monitoring
LLM tracingevalsLangChain integration
Pros
  • Strong open-source story via Phoenix and OpenInference
  • Span/trace/session-level evals tuned for agentic workflows
  • Scales to trillions of spans with enterprise compliance (SOC 2, HIPAA, GDPR)
  • Broad framework coverage: LangGraph, LangChain, CrewAI, OpenAI, Anthropic
  • Self-hosted option for regulated deployments
  • Tight LangChain integration
  • Strong tracing UX
  • Mature dataset/eval flows
  • Reasonable per-seat pricing
Cons
  • Public pricing is opaque; serious usage means a sales call
  • Feature surface is heavy for solo developers or hobby projects
  • Best value assumes you've standardized on OpenInference tracing
  • Best value if you're on LangChain
  • UI can feel dense
Websitearize.comwww.langchain.com
Pick Arize AI if
  • ✅ Strong open-source story via Phoenix and OpenInference
  • ✅ Span/trace/session-level evals tuned for agentic workflows
  • ✅ Scales to trillions of spans with enterprise compliance (SOC 2, HIPAA, GDPR)
  • ✅ Broad framework coverage: LangGraph, LangChain, CrewAI, OpenAI, Anthropic
Pick LangSmith if
  • ✅ Tight LangChain integration
  • ✅ Strong tracing UX
  • ✅ Mature dataset/eval flows
  • ✅ Reasonable per-seat pricing
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