Comparison

Helicone vs Ray

On the evidence we track, Ray leads this comparison with a composite score of 71/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Helicone41
★Ray71
Score
vioscaleAI score
Helicone41 / 100low · 22%
Ray71 / 100medium · 65%
Pricing
Free tier
Helicone–
Ray✓
Model
Helicone–
Price level
Helicone–
Rayfree
Integrations
Count
Helicone2
Ray17
Reliability
Status page
Helicone✓
Ray✓
Adoption
Dependent repos
Helicone–
Github stars
Helicone–
Package downloads weekly
Helicone396
Activity
Commits last 30d
Helicone–
Ray100
Release
Cadence days
Helicone–
Ray18
History
Helicone–
License
Spdx
Language
Primary
HeliconePython
Content
Faq
Helicone–

Capabilities

Feature-by-feature on the axes that matter for mlops & llmops tools. “-” means undocumented, not absent.

Core
Tool role
HeliconeLLM observability / eval
RayAgent / RAG framework
Deployment
Self-hostable / OSS core
Helicone-
Ray✓
Managed cloud available
Helicone-
Ray✓
On-prem / VPC deployment
Helicone-
Ray✓
Observability
LLM tracing / observability
Helicone✓
Ray✓
Evaluation (offline / LLM-judge / human)
Helicone-
Ray-
Dev
Prompt management + versioning
Helicone-
Ray-
Tracking
Experiment tracking / model registry
Helicone-
Ray✓
Serving
Model serving / inference endpoint
Helicone-
Ray✓
Interop
OpenTelemetry / OpenLLMetry compatible
Helicone-
Ray✓
Framework-agnostic
Helicone-
Ray✓
Gateway
Multi-provider model support
Helicone✗
Ray✓
Data
No-train-on-customer-data guarantee
Helicone-
Ray-

What each one is

The product in its own terms, so the numbers below have context.

Helicone

A Python wrapper that automatically captures and logs all OpenAI API calls for monitoring and analysis.

Independently observed

Ray

Leader

Open-source framework for building and scaling distributed ML and Python applications, supporting the full pipeline from data processing and model training to inference and serving with simple APIs.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Helicone

Pricing not documented yet.

Ray

Leader
Open source
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
CLI
Helicone–
Ray✓
Deployment
Cloud / SaaS
Helicone–
Ray✓
Self-hosted
Helicone–
Ray✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Helicone

2 total
  • OpenAI
  • Helicone
Independently observed

Ray

Leader
27 total
  • PyTorch
  • TensorFlow
  • AIBrix
  • AReaL
  • Cosmos Curate
  • Daft
  • Data-Juicer
  • DeltaCAT
  • Modin
  • NeMo Curator
  • NeMo-RL
  • OpenRLHF
  • RayDP
  • ROLL
  • SkyRL
  • SLIME
  • Syftr
  • verl
  • vLLM
  • Kubernetes
  • AWS
  • GCP
  • Azure
  • Databricks
  • +3 more
Independently observed
Still deciding?

Helicone or Ray: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.