Arize Phoenix vs Helicone
Learn how Arize Phoenix and Helicone differ in their key features, development activity, technology
stack and community adoption, so you can decide which of these llm observability & evaluation is best for you.
Learn how Arize Phoenix and Helicone differ in their key features, development activity, technology stack and community adoption, so you can decide which of these llm observability & evaluation is best for you.
Arize Phoenix
Last 30 days
Last commit
7 hours agoRepository age
4 yearsVersion
v20.3.0License
Elastic-2.0Self-hosted
YesRepository
arize-ai/phoenix
Helicone
Last 30 days
Last commit
3 days agoRepository age
4 yearsVersion
v2025.08.21-1License
Apache-2.0Repository
helicone/helicone
Detailed Comparison
Arize Phoenix appears to have several advantages over Helicone, particularly in popularity, growth and features. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.
Arize Phoenix appears to have several advantages over Helicone, particularly in popularity, growth and features. Consider your specific needs regarding popularity, growth, activity, technology, maturity, licensing and features when making your decision.
Community & Popularity
Arize Phoenix leads in popularity with 11,113 stars vs 6,084 stars for Helicone. The 83% higher star count indicates stronger community adoption. In terms of developer contributions, Arize Phoenix has 1,067 forks, indicating strong developer engagement.
Growth Momentum
Arize Phoenix is growing faster, adding 471 stars in the last 30 days (+4.4%) against adding 113 stars for Helicone (+1.9%). Arize Phoenix is both larger and pulling further ahead.
Development Activity
Both projects show recent activity, with Arize Phoenix last updated 7 hours ago and Helicone 3 days ago.
Technology Stack
Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript, JSX, Python. However, they differ in their additional technology choices: Helicone leverages Next.js.
Project Maturity
Both projects started around the same time, with Arize Phoenix beginning 4 years ago and Helicone 4 years ago.
Licensing
The projects use different licenses: Arize Phoenix is licensed under Elastic-2.0 while Helicone uses Apache-2.0. Consider the licensing requirements when choosing for your project.
Use Cases & Features
Both tools serve similar use cases in LLM Observability & Evaluation.
Hosting & Deployment
Arize Phoenix provides self-hosting options for complete data control and customization, while Helicone may be primarily cloud-based or require different deployment approaches.
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