| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · Deep Learning Software | 8.1 (#11) | 7.4 (#25) |
| Purpose | Horovod is a distributed deep learning training framework for TensorFlow, Keras, PyTorch and Apache MXNet. | Ray Train distributes model training compute to worker processes across a Ray cluster. |
| Security | The documentation includes a security section for Horovod on Spark; the opened pages make no security certification or compliance claim. | Ray supports built-in token authentication starting in version 2.52.0, while its security guidance calls for controlled networks and trusted code. |
| Support | The project directs users to documentation, troubleshooting guidance and a ticket submission link for unresolved issues. | The Ray site offers a community Slack, forums, and documentation, and says Anyscale offers hands-on training and expert support. |