| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 0 |
| Spec score · Deep Learning Software | 8.1 (#10) | 7.5 (#19) |
| Installation | The documentation says to install fastai on a machine with `pip install fastai` and recommends installing PyTorch first. | Keras installs from PyPI with pip install --upgrade keras; using Keras 3 also requires installing a backend framework. |
| Purpose | fastai simplifies training fast and accurate neural networks using modern best practices. | Keras is a Python deep learning API designed to make model development concise, readable, and easier to debug. |
| Support | The fast.ai forums include a category for help installing and using the fastai library for users at any level. | The Keras site directs users to its Google Group for questions and development discussion, and GitHub issues for bug reports and feature requests. |