Comparison

Kubeflow 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.
Kubeflow46
★Ray71
Score
vioscaleAI score
Kubeflow46 / 100low · 43%
Ray71 / 100medium · 65%
Pricing
Free tier
Kubeflow✓
Ray✓
Model
Price level
Kubeflowfree
Rayfree
Transparent
Kubeflow✓
Ray–
Integrations
Count
Kubeflow7
Ray17
Reliability
Status page
Kubeflow–
Ray✓
Adoption
Dependent repos
Kubeflow40
Github stars
Kubeflow15,902
Package downloads weekly
Kubeflow–
Activity
Commits last 30d
Kubeflow1
Ray100
Release
Cadence days
Kubeflow25
Ray18
History
Kubeflow20 items
License
Spdx
Language
Primary
Kubeflow–
Content
Faq
Kubeflow6 items

Capabilities

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

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

What each one is

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

Kubeflow

Kubeflow is an open-source platform that provides composable, Kubernetes-native tools for the entire AI lifecycle, including model training, hyperparameter tuning, pipeline orchestration, model management, and notebook environments. It enables AI teams to build scalable ML systems on any Kubernetes infrastructure.

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.

Kubeflow

Open source
as of verify ↗

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
Web
Kubeflow✓
Ray✗
CLI
Kubeflow✓
Ray✓
Deployment
Cloud / SaaS
Kubeflow✓
Ray✓
Self-hosted
Kubeflow✓
Ray✓
On-premise
Kubeflow✓
Ray✗
Hybrid
Kubeflow✓
Ray✗

Integrations

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

In common (3)
  • PyTorch
  • TensorFlow
  • Spark

Kubeflow

9 total - 6 not shared
  • JAX
  • XGBoost
  • HuggingFace
  • DeepSpeed
  • Megatron
  • MLX
Independently observed

Ray

Leader
27 total - 24 not shared
  • 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
  • DeltaLake
  • Pandas
Independently observed
Still deciding?

Kubeflow 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.