# MLflow vs Weights & Biases

**Leader by Vioscale score:** MLflow

| Attribute | MLflow | Weights & Biases |
|---|---|---|
| **Vioscale score** | 78.8 (47% (low)) | 78.2 (25% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.github_stars | 27,317 | 11,214 |
| adoption.package_downloads_weekly | 9,366,011 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | Open source platform for debugging, evaluating, monitoring, and optimizing AI agents and LLM applications with production-grade tracing, evaluation, prompt management, and experiment tracking. Also supports full machine learning lifecycle management including model training and deployment. | Weights & Biases provides experiment tracking, model evaluation, LLM serving, and AI application monitoring. It offers hyperparameter optimization, data visualization, evaluation tools, and serverless inference for multiple LLM providers. |
| features.capabilities | `{"role":"framework","evaluation":true,"managed_cloud":false,"model_serving":true,"self_hostable":true,"multi_provider":true,"vpc_deployment":true,"otel_compatible":true,"llm_observability":true,"prompt_management":true,"framework_agnostic":true,"experiment_tracking":true}` | `{"role":"platform","evaluation":true,"managed_cloud":true,"model_serving":true,"self_hostable":false,"multi_provider":true,"no_train_on_data":"unknown","llm_observability":true,"prompt_management":true,"framework_agnostic":true,"experiment_tracking":true}` |
| integrations.count | 3 | - |
| integrations.list | `[{"name":"OpenTelemetry"},{"name":"LLM providers (any)"},{"name":"Agent frameworks (any)"}]` | - |
| language.primary | Python | Python |
| license.spdx | Apache-2.0 | MIT |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://mlflow.org","retrievedAt":"2026-08-01T15:18:38.042Z"}` | - |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | free | - |
| pricing.transparent | yes | - |
| release.cadence_days | 10 | 20 |
| reliability.status_page | - | yes |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.iso27001 | - | yes |
| security.soc2 | - | yes |

## Capabilities (MLOps & LLMOps Tools)

| Capability | MLflow | 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 | - | Unknown |

*Source: Vioscale. Generated 2026-08-07T00:01:56.942Z. "-" = undocumented, not absent.*