fastai
The fastai deep learning library
Our verdict
A usable project with some maintenance caveats. This assessment is derived from GitHub's own repository metrics on 2026-08-30, not from hands-on testing.
The fastai deep learning library. The project is written primarily in Jupyter Notebook, released under Apache-2.0, and has 28,127 stars and 7,641 forks on GitHub. 263 contributors have committed to it, and the most recent push was 2026-08-29. The latest tagged release is 2.8.8 (2026-07-30). Figures come from the GitHub API on 2026-08-30 and are refreshed daily; the score below weighs adoption, maintenance, release discipline, contributor breadth, licence clarity and issue hygiene.
Repository
- Licence
- Apache-2.0
- Language
- Jupyter Notebook
- Last push
- 2026-08-29
Releases
-
2.8.8v2.8.8 -
2.8.7v2.8.7 -
2.8.6v2.8.6 -
2.8.5v2.8.5 -
2.8.4v2.8.4 -
2.8.3v2.8.3
Pros and cons
Pros
Pricing
- Free tierYes
- LicenceApache-2.0
- Self-hostYes, source is public
- Public price listNot published
fastai does not publish a web price list. For consumer apps that usually means pricing appears inside the product; for enterprise tools it means talking to sales. Why we do this
Visit docs.fast.aiTrends
Price points are recorded when a price moves, not on a schedule, so a flat run means the price held. Release cadence comes from GitHub releases. A series appears only once we have watched it for long enough to have more than one observation.
User reviews
No one has reviewed fastai here yet. Reviews are moderated before they appear, and our own score is editorial and separate from user ratings, though once reviews land they do lift it.
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fastai alternatives
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Side by side
| Tool | Our score | From | Free tier | Best for | |
|---|---|---|---|---|---|
| fastai this page | 7.4 | - | Yes | ||
| PEFT | 7.7 | - | Yes | ||
| PyTorch Image Models (timm) | 7.7 | - | Yes | ||
| LlamaFactory | 7.3 | - | Yes | ||
| DeepSpeed | 7 | - | Yes | ||
| Hugging Face Datasets | 7 | - | Yes | ||
| Label Studio | 6.7 | - | Yes |
Questions
Is fastai free?
Yes. fastai advertises a free tier on its own site.
How much does fastai cost?
fastai does not publish a web price list. For consumer apps that usually means pricing appears inside the product; for enterprise tools it means talking to sales.
Is fastai open source?
Yes. fastai is a public repository released under Apache-2.0. You can self-host or inspect the source directly.
How is fastai scored here?
fastai scores 7.4 out of 10. That comes from a desk review of public evidence, which is capped at 8.5 out of 10: public pricing, documentation, maintenance signals and how much we could actually verify. Affiliate relationships are excluded from scoring entirely. The full rubric is published on our methodology page.