# Ray vs Weights & Biases

| Attribute | Ray | Weights & Biases |
|---|---|---|
| **Vioscale score** | 66.8 (68% (medium)) | 67.2 (38% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 3,641 | 9,299 |
| adoption.github_stars | 43,612 | 11,240 |
| adoption.package_downloads_weekly | 11,291,327 | - |
| deployment.options | `{"cloud":true,"hybrid":true,"on_prem":true,"self_hosted":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | Ray is an open-source unified framework for scaling Python and machine learning applications across any infrastructure. It provides distributed compute primitives, specialized AI libraries for data processing, model training, tuning, and serving, with seamless scaling from development environments to large clusters. | An integrated platform for developing AI applications, from training and fine-tuning models to deploying agents in production, with comprehensive experiment tracking, model management, and LLM application monitoring. |
| features.capabilities | `{"managed_cloud":true,"model_serving":true,"self_hostable":true,"multi_provider":true,"vpc_deployment":true,"framework_agnostic":true,"experiment_tracking":true}` | `{"role":"platform","evaluation":true,"managed_cloud":true,"model_serving":true,"self_hostable":true,"vpc_deployment":true,"llm_observability":true,"prompt_management":true,"framework_agnostic":true,"experiment_tracking":true}` |
| integrations.count | 17 | 8 |
| integrations.list | `[{"name":"PyTorch"},{"name":"TensorFlow"},{"name":"AIBrix"},{"name":"AReaL"},{"name":"Cosmos Curate"},{"name":"Daft"},{"name":"Data-Juicer"},{"name":"DeltaCAT"},{"name":"Modin"},{"name":"NeMo Curator"},{"name":"NeMo-RL"},{"name":"OpenRLHF"},{"name":"RayDP"},{"name":"ROLL"},{"name":"SkyRL"},{"name":"SLIME"},{"name":"Syftr"},{"name":"verl"},{"name":"vLLM"}]` | `[{"name":"OpenAI"},{"name":"Alibaba Qwen"},{"name":"Meta Llama"},{"name":"Microsoft Phi"},{"name":"Hangzhou DeepSeek"},{"name":"Z.ai GLM"},{"name":"MoonshotAI Kimi"},{"name":"CoreWeave"}]` |
| language.primary | Python | Python |
| license.spdx | Apache-2.0 | MIT |
| platform.support | `{"cli":true}` | `{"cli":true,"ios":true,"web":true}` |
| pricing | `{"type":"free","freeTier":true,"sourceUrl":"https://www.ray.io","retrievedAt":"2026-08-14T16:39:27.110Z"}` | - |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | free | - |
| release.cadence_days | 18 | 16 |
| release.history | `[{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.58.0","date":"2026-08-23T05:42:08Z","type":"stable","version":"ray-2.58.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.57.0","date":"2026-08-11T01:15:44Z","type":"stable","version":"ray-2.57.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.56.1","date":"2026-07-17T23:19:47Z","type":"stable","version":"ray-2.56.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.56.0","date":"2026-06-29T20:32:55Z","type":"stable","version":"ray-2.56.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.55.1","date":"2026-04-22T20:24:41Z","type":"stable","version":"ray-2.55.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.55.0","date":"2026-04-15T20:34:27Z","type":"stable","version":"ray-2.55.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.54.1","date":"2026-03-25T23:37:39Z","type":"stable","version":"ray-2.54.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.54.0","date":"2026-02-18T23:44:44Z","type":"stable","version":"ray-2.54.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.53.0","date":"2025-12-20T15:16:24Z","type":"stable","version":"ray-2.53.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.51.2","date":"2025-11-29T00:40:40Z","type":"stable","version":"ray-2.51.2"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.52.1","date":"2025-11-28T02:23:22Z","type":"stable","version":"ray-2.52.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.52.0","date":"2025-11-21T19:10:39Z","type":"stable","version":"ray-2.52.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.51.1","date":"2025-11-01T03:27:11Z","type":"stable","version":"ray-2.51.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.51.0","date":"2025-10-29T05:33:49Z","type":"stable","version":"ray-2.51.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.50.1","date":"2025-10-18T19:21:43Z","type":"stable","version":"ray-2.50.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.50.0","date":"2025-10-10T23:06:29Z","type":"stable","version":"ray-2.50.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.49.2","date":"2025-09-19T18:10:36Z","type":"stable","version":"ray-2.49.2"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.49.1","date":"2025-09-03T00:44:11Z","type":"stable","version":"ray-2.49.1"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.49.0","date":"2025-08-26T19:52:24Z","type":"stable","version":"ray-2.49.0"},{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.48.0","date":"2025-07-18T22:27:25Z","type":"stable","version":"ray-2.48.0"}]` | `[{"url":"https://github.com/wandb/wandb/releases/tag/v0.28.2","date":"2026-08-12T01:35:26Z","type":"stable","version":"v0.28.2"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.28.1","date":"2026-07-16T18:48:24Z","type":"stable","version":"v0.28.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.28.0","date":"2026-06-23T00:46:58Z","type":"stable","version":"v0.28.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.27.2","date":"2026-06-06T01:48:49Z","type":"stable","version":"v0.27.2"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.27.1","date":"2026-06-04T06:12:42Z","type":"stable","version":"v0.27.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.27.0","date":"2026-05-14T03:45:43Z","type":"stable","version":"v0.27.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.26.1","date":"2026-04-23T16:40:38Z","type":"stable","version":"v0.26.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.26.0","date":"2026-04-13T19:45:29Z","type":"stable","version":"v0.26.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.25.1","date":"2026-03-10T23:54:02Z","type":"stable","version":"v0.25.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.25.0","date":"2026-02-13T19:44:06Z","type":"stable","version":"v0.25.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.24.2","date":"2026-02-05T00:19:26Z","type":"stable","version":"v0.24.2"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.24.1","date":"2026-01-29T23:47:48Z","type":"stable","version":"v0.24.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.24.0","date":"2026-01-13T23:01:48Z","type":"stable","version":"v0.24.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.23.1","date":"2025-12-03T02:27:21Z","type":"stable","version":"v0.23.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.23.0","date":"2025-11-11T21:27:15Z","type":"stable","version":"v0.23.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.22.3","date":"2025-10-29T00:00:30Z","type":"stable","version":"v0.22.3"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.22.2","date":"2025-10-07T19:55:36Z","type":"stable","version":"v0.22.2"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.22.1","date":"2025-09-29T17:18:23Z","type":"stable","version":"v0.22.1"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.22.0","date":"2025-09-18T20:09:42Z","type":"stable","version":"v0.22.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.21.4","date":"2025-09-11T21:24:51Z","type":"stable","version":"v0.21.4"}]` |
| reliability.status_page | yes | yes |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.scorecard | 5.7 | - |
| security.soc2 | - | yes |
| security.vulnerabilities | `{"count":12,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=ray&per_page=100","last_12m":6,"max_severity":"CRITICAL"}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=wandb&per_page=100","last_12m":0,"max_severity":"HIGH"}` |

## Capabilities (MLOps & LLMOps Tools)

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

*Source: Vioscale. Generated 2026-09-01T17:06:06.565Z. "-" = undocumented, not absent.*