Arize Phoenix

Self-hostable Arize project that ingests OTLP traces, runs evaluations and experiments, and versions prompts, free of feature gates.

By Arize AI, Inc. · phoenix.arize.com

Package download activity

Each package is shown on its own; packages that can be installed together are never added up. Week 2026-W40 (2026-09-28 to 2026-10-04).

npm@arizeai/phoenix-otel · headline (ranked)

73,285 downloads in the week, -37.5% vs prior week · rank 11 on npm

2026-W29 to 2026-W40, 12 weeks; min 48,282, max 117,169

PyPIarize-phoenix · headline (ranked)

161,687 downloads in the week, +13.6% vs prior week · rank 17 on PyPI

2026-W29 to 2026-W40, 12 weeks; min 142,350, max 649,396

PyPIarize-phoenix-otel · current

428,017 downloads in the week, +13.1% vs prior week

2026-W29 to 2026-W40, 12 weeks; min 328,116, max 473,797

bundledBundled by arize-phoenix: installed automatically as a required dependency, so these downloads include installs of arize-phoenix. source

Arize-ai/phoenix: 11,744 stars (rank 11). Stars are a point-in-time count of a repository's bookmarks, not people using the tool.

Series starts 2026-W40 (11,744).

Facts for Arize Phoenix
Categories	Tracing & observability, Evaluation, Prompt management
Status	Generally available
Licence	Elastic-2.0 (source-available)	source, checked 2026-10-07
Self-host	Yes	source, checked 2026-10-07
OpenTelemetry	Native (OTLP)	source, checked 2026-10-07
Pricing model	free
Entry price	Free; Phoenix itself is free to self-host; the paid managed product is listed separately as Arize AX	source, checked 2026-10-07
Free tier	Yes
Measurability	Measured (mapped SDK packages)

Facts last verified 2026-10-07 on first-party pages. Prices as published, taxes excluded; non-USD prices are not converted.

Spotted an outdated fact? The methodology page explains how facts are checked; corrections are applied at the next weekly build.