DeepYard

Arize Phoenix vs Helicone

Side-by-side comparison built from DeepYard's structured catalog. Content updated Aug 21, 2026.

Direct Answer

Arize Phoenix suits teams needing freemium free tier, evaluation focus, and 11,142 GitHub stars in current listing data. Helicone suits teams needing freemium $20/mo, anthropic focus, and 6,093 GitHub stars in current listing data. This summary reflects catalog metadata only for decision support, not independent testing.

What this comparison weighs

  • Pricing and free-tier availability
  • License model and deployment fit
  • GitHub adoption and contributor depth
  • Catalog tags, integrations, and supported workflows
A

Arize Phoenix

Open-source LLM observability with tracing, evaluation, and datasets — 8K+ stars

OSSfreemium
11.1K250.0K/wtoday207
Visit GitHub
H

Helicone

Open-source LLM observability proxy with one-line integration

OSSfreemium
6.1K6d ago96
Visit GitHub
MetricArize PhoenixHelicone
GitHub Stars11.1K6.1K
Contributors20796
Last CommitAug 22, 2026Aug 16, 2026
Open Issues929150
Licenseopen-sourceopen-source
Pricingfreemiumfreemium
Free TierYesYes
Categorydev-toolsdev-tools
TrendingNoNo

Choose Arize Phoenix if you need

  • • Arize Phoenix stands out for Evaluation workflows that are not listed for Helicone.
  • • Arize Phoenix is the stronger pick when Llamaindex matters because that capability is listed only on its profile.
  • • Arize Phoenix shows broader GitHub adoption with 11,142 stars versus 6,093 for Helicone.

Choose Helicone if you need

  • • Helicone is the stronger pick when Anthropic matters because that capability is listed only on its profile.
  • • Helicone is the cleaner fit if you specifically need Proxy workflows from the catalog tags.

Meaningful differences

  • • Pricing model: Arize Phoenix is listed as freemium from Free (self-hosted), cloud plans available, while Helicone is listed as freemium from $20/mo.
  • • Workflow emphasis: Arize Phoenix highlights Evaluation, while Helicone highlights Observability.
  • • GitHub adoption: Arize Phoenix shows 11,142 stars versus 6,093 for Helicone.
  • • Contributor count: Arize Phoenix lists 207 contributors and Helicone lists 96.

Shared capabilities

  • • Observability
  • • Open Source
  • • Langchain
  • • Openai

Shared Tags

observabilityopen-source

Only in Arize Phoenix

tracingevaluationopentelemetrydebugging

Only in Helicone

proxycost-trackingllm-ops

Limitations and evidence

  • • DeepYard compares structured public metadata; this is not an independent benchmark unless a test record is shown.
  • • Signals such as stars, contributors, and last commit indicate public activity, not purchase fit or runtime quality.
  • • Pricing and feature coverage reflect the stored listing snapshot and may lag vendor changes between refreshes.

Source links

Manifest content date: 2026-08-21

About Arize Phoenix

Arize Phoenix is an open-source observability platform for LLM applications. It provides tracing for multi-step agent workflows, built-in evaluation with LLM-as-judge and code-based evals, dataset management for experiments, and a visual UI for debugging prompt/response pairs. Phoenix integrates with OpenTelemetry, LangChain, LlamaIndex, and OpenAI, and can run locally or in the cloud.

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About Helicone

Helicone is an open-source observability platform for LLMs that works as a transparent proxy — add one line to your base URL and immediately get request logging, cost tracking, latency histograms, and user-level analytics. It supports caching, rate limiting, and prompt management out of the box, making it one of the fastest ways to add production visibility to any OpenAI-compatible API call.

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