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Arize Phoenix vs Helicone

The same facts for both, read from GitHub every night, and the relation a person reviewed.

Arize PhoenixHelicone
LanguagePythonTypeScript
LicenceOtherApache-2.0
Stars12k6.2k
Latestarize-phoenix-v20.19.0v2025.08.21-1
Last push2026-10-062026-09-16
Release cadenceabout 1 day between releasesabout 1 day between releases
Active contributors55+ commit authors on the default branch in the last 90 days3 commit authors on the default branch in the last 90 days
Flagsnonenone

How they relate

  • Both replace LangSmith. Alternatives to LangSmith →

    Full replacementArize PhoenixTracing over OpenTelemetry, datasets, experiments and evaluations.

    PartialHeliconeLogs requests through a proxy gateway, with cost tracking and prompt versions, lighter on agent traces and evaluations.