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Arize Phoenix

Monitoring Intermediate Proprietary Open core

A self-hostable LLM observability tool for tracing, evaluating, and debugging AI applications, built on OpenTelemetry.

Strengths

  • Unified tracing, evaluation, datasets, experiments, and prompt management
  • OpenTelemetry-based, with 40+ framework and provider integrations
  • Runs fully locally via pip or Docker

Weaknesses

  • Elastic License 2.0 is source-available, not OSI open source, and restricts hosted-service resale
  • A lot of features to learn for basic tracing
  • Usage telemetry is on by default unless disabled

At a glance

Licence
Elastic License 2.0
Pricing
Open core
Platforms
macOS, Windows, Linux, Docker, Web
GPU required
No

Links

Related guides

See also

Glossary

Entry last verified 18 August 2026.