Arize Phoenix vs Traceloop

Detailed side-by-side comparison to help you choose the right tool

Arize Phoenix

🔴Developer

AI Observability

Arize Phoenix is an open-source AI observability and evaluation platform for tracing, testing, and improving LLM applications and agents.

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Starting Price

Free
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Traceloop

🔴Developer

AI Observability

An observability platform and open-source instrumentation toolkit for tracing language-model applications and agents using OpenTelemetry-compatible conventions.

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Starting Price

Custom
Full ReviewVisit Site

Feature Comparison

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FeatureArize PhoenixTraceloop
CategoryAI ObservabilityAI Observability
Pricing Plans4 listed plansPlan details unavailable
Starting PriceFreeCustom
Key Features
  • • LLM Tracing & Observability
  • • Evaluation Framework
  • • Experiment Management
  • • LLM traces and prompt-response visibility
  • • Agent and workflow spans
  • • OpenTelemetry-compatible instrumentation

Arize Phoenix - Pros & Cons

Pros

  • ✓Open-source Phoenix can run locally or on controlled infrastructure without a software license fee.
  • ✓OpenTelemetry tracing reduces instrumentation lock-in.
  • ✓Datasets, experiments, evaluations, and Prompt IDE connect evidence to changes.
  • ✓AX Free and Pro include unlimited users and evaluations at published prices.

Cons

  • ✗Self-hosting shifts upgrades, storage, access control, backups, and availability to the user's team.
  • ✗Agent runs can generate many spans, consuming 25,000 or 50,000 allowances quickly.
  • ✗Managed retention of 15 or 30 days may be short for audits or long incident cycles.
  • ✗Fetched pages did not explicitly document native MCP support.

Traceloop - Pros & Cons

Pros

  • ✓OpenTelemetry alignment reduces proprietary instrumentation lock-in
  • ✓Agent-level spans expose failures hidden by aggregate model metrics
  • ✓Evaluations connect operational traces to output quality

Cons

  • ✗Current hosted retention, event limits, and pricing could not be verified
  • ✗Captured prompts may contain personal data, secrets, or regulated content
  • ✗Instrumentation adds overhead and still requires a deliberate span and sampling design

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🔒 Security & Compliance Comparison

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Security FeatureArize PhoenixTraceloop
SOC2✅ Yes—
GDPR✅ Yes—
HIPAA❌ No—
SSO❌ No—
Self-Hosted✅ Yes—
On-Prem✅ Yes—
RBAC❌ No—
Audit Log❌ No—
Open Source✅ Yes—
API Key Auth✅ Yes—
Encryption at Rest✅ Yes—
Encryption in Transit✅ Yes—
Data ResidencyAvailable—
Data Retentionconfigurable—
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Review Arize PhoenixReview Traceloop