# Ray vs Weights & Biases

**Leader by vioscaleAI score:** Ray

| Attribute | Ray | Weights & Biases |
|---|---|---|
| **vioscaleAI score** | 70.8 (65% (medium)) | 64.6 (44% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 3,641 | 9,299 |
| adoption.github_stars | 44,036 | 11,268 |
| adoption.package_downloads_weekly | 11,291,327 | - |
| content.faq | `[{"answer":"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. It is indexed under MLOps & LLMOps Tools.","source":"https://www.ray.io","question":"What is Ray?","confidence":0.6},{"answer":"Ray offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.ray.io","question":"Is Ray free?","confidence":0.6},{"answer":"Ray supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.ray.io","question":"What platforms does Ray support?","confidence":0.6},{"answer":"Yes. Ray can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://www.ray.io","question":"Can Ray be self-hosted?","confidence":0.6},{"answer":"We have confirmed 19 integrations for Ray, including PyTorch, TensorFlow, AIBrix, AReaL, Cosmos Curate, Daft, Data-Juicer and DeltaCAT, plus 11 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.ray.io","question":"What does Ray integrate with?","confidence":0.6},{"answer":"Yes. Ray is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/ray-project/ray","question":"Is Ray open source?","confidence":0.67}]` | `[{"answer":"Weights & Biases provides an AI development platform for building and managing machine learning models with integrated experiment tracking, dataset and model management, prompt versioning, and collaborative code features. It supports multiple deployment options including cloud-hosted SaaS, dedicated instances, and self-managed deployments. It is indexed under MLOps & LLMOps Tools.","source":"https://wandb.ai","question":"What is Weights & Biases?","confidence":0.6},{"answer":"Weights & Biases supports the web and iOS. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://wandb.ai","question":"What platforms does Weights & Biases support?","confidence":0.6},{"answer":"Yes. Weights & Biases can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://wandb.ai","question":"Can Weights & Biases be self-hosted?","confidence":0.6},{"answer":"We have confirmed 10 integrations for Weights & Biases, including OpenAI, Alibaba Qwen, Meta Llama, Microsoft Phi, Hangzhou DeepSeek, Z.ai GLM, MoonshotAI Kimi and CoreWeave, plus 2 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://wandb.ai","question":"What does Weights & Biases integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, ISO 27001, HIPAA and GDPR for Weights & Biases. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Weights & Biases not holding them. Always confirm compliance directly before you rely on it.","source":"https://wandb.ai","question":"What security certifications does Weights & Biases have?","confidence":0.6},{"answer":"Yes. Weights & Biases is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/wandb/wandb","question":"Is Weights & Biases open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"self_hosted":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | 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. | A collaborative development platform that enables tracking of ML experiments, versioning of models, evaluation of AI systems, and deployment to production. It provides specialized observability and tracing capabilities for LLM applications, with support for both managed cloud and self-hosted infrastructure. |
| features.capabilities | `{"role":"framework","managed_cloud":true,"model_serving":true,"self_hostable":true,"multi_provider":true,"vpc_deployment":true,"otel_compatible":true,"llm_observability":true,"framework_agnostic":true,"experiment_tracking":true}` | `{"role":"platform","evaluation":true,"managed_cloud":true,"model_serving":true,"self_hostable":true,"multi_provider":true,"vpc_deployment":true,"llm_observability":true,"prompt_management":true,"framework_agnostic":true,"experiment_tracking":true}` |
| integrations.count | 17 | 9 |
| 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":"Kubernetes","native":true,"category":"infrastructure"},{"name":"AWS","native":true,"category":"cloud"},{"name":"GCP","native":true,"category":"cloud"},{"name":"Azure","native":true,"category":"cloud"},{"name":"Databricks","native":true,"category":"data_platform"},{"name":"DeltaLake","native":true,"category":"data_storage"},{"name":"Spark","native":true,"category":"data_processing","direction":"bidirectional"},{"name":"Pandas","native":true,"category":"data_processing","direction":"bidirectional"}]` | `[{"name":"OpenAI"},{"name":"Alibaba Qwen"},{"name":"Meta Llama"},{"name":"Microsoft Phi"},{"name":"Hangzhou DeepSeek"},{"name":"Z.ai GLM"},{"name":"MoonshotAI Kimi"},{"name":"CoreWeave"},{"name":"LangChain","native":false},{"name":"TensorBoard","native":true},{"name":"AWS Bedrock","category":"cloud"},{"name":"Claude Code","category":"ide"},{"name":"Google Agent Development Kit"},{"name":"SambaNova Cloud","category":"cloud"},{"name":"Friendli","category":"deployment"},{"name":"deepset"}]` |
| language.primary | Python | Python |
| license.spdx | Apache-2.0 | MIT |
| platform.support | `{"cli":true}` | `{"cli":true,"ios":true,"web":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://www.ray.io","retrievedAt":"2026-09-14T15:30:52.746Z"}` | `{"type":"free","freeTier":true,"sourceUrl":"https://wandb.ai","retrievedAt":"2026-10-05T10:12:41.326Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | free |
| pricing.price_level | free | free |
| pricing.transparent | - | no |
| release.cadence_days | 18 | 16 |
| release.history | `[{"url":"https://github.com/ray-project/ray/releases/tag/ray-2.59.0","date":"2026-10-02T07:04:37Z","type":"stable","version":"ray-2.59.0"},{"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/wandb/wandb/releases/tag/v0.30.0","date":"2026-09-09T00:28:20Z","type":"stable","version":"v0.30.0"},{"url":"https://github.com/wandb/wandb/releases/tag/v0.29.0","date":"2026-08-26T23:44:47Z","type":"stable","version":"v0.29.0"},{"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"}]` |
| reliability.status_page | yes | yes |
| security.certifications | - | `[{"name":"ISO/IEC 27001:2022","status":"active"},{"name":"ISO/IEC 27017:2015","status":"active"},{"name":"ISO/IEC 27018:2019","status":"active"},{"name":"SOC 2","status":"active"},{"name":"HIPAA","status":"active"},{"name":"NIST 800-53","status":"active"}]` |
| 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 | Agent / RAG framework | 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: vioscaleAI. Generated 2026-10-17T22:14:51.111Z. "-" = undocumented, not absent.*