| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 1 |
| Spec score · Experiment Tracking | 7.4 (#10) | 7.4 (#12) |
| Spec score · ML Experiment Tracking Software | 7.3 (#22) | 7.4 (#21) |
| API | OpenML offers a REST API for uploading and downloading machine learning resources, with XML and JSON endpoints. | Valohai says every platform operation is available through an API for custom integrations and workflows. |
| Experiment tracking | OpenML supports automatic tracking and sharing of pipelines, called flows, and experiment runs. | The platform tracks and versions ML experiments to support reproducibility. |
| Integrations | The documentation lists integrations for Python/scikit-learn, PyTorch, TensorFlow, R, Julia, Rust, and .NET. | Its ecosystem lists a Hugging Face template and connectors for Snowflake, BigQuery, and Redshift, plus Slurm cluster management integration. |
| Purpose | OpenML is an open platform for sharing datasets, algorithms, and experiments for machine learning. | Valohai describes itself as an MLOps platform for orchestrating machine learning workflows and managing compute, datasets, and pipelines. |
| Support | OpenML lists its community discussions and the contact address [email protected]. | Subscriptions include technical support from the Customer Engineering team, along with training and onboarding resources. |
