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Arize Phoenix

Open-source AI observability and evaluation platform

Self-Hosted AI ★ 11.8k stars Medium setup Elastic-2.0

Phoenix by Arize is an open-source observability platform for experimentation, evaluation and troubleshooting of LLM and ML applications. It runs as a self-hosted server collecting OpenTelemetry traces from AI apps.

Official siteSource code

Key features

  • LLM tracing and spans
  • Built-in evaluators
  • OpenTelemetry-based
  • Self-hostable

Strengths

  • Released under the Elastic-2.0 license
  • First-class Docker support for quick deployment
  • Mature project with 11.8k GitHub stars
  • Written in Python

Is Arize Phoenix secure?

OSV.dev has no published security advisories for Arize Phoenix's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Arize Phoenix replaces

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Health badge

Maintain Arize Phoenix? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 93 · excellent

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The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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