compare
Pyrefly vs ty
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Pyrefly | ty |
|---|---|---|
| Language | Rust | Python |
| Licence | MIT | MIT |
| Stars | 7k | 20k |
| Latest | 1.3.2 | 0.0.84 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | too few releases | about 3 days between releases |
| Active contributors | 39+ commit authors on the default branch in the last 90 days | 15 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace mypy. Alternatives to mypy →
Full replacementPyreflyWritten in Rust, with a language server for editors.
Full replacementtyStill in beta.
Pyrefly
- 1.4.0-dev.32026-10-02Pyrefly v1.4.0-dev.3pre-release
- 1.4.0-dev.22026-09-28Pyrefly v1.4.0-dev.2pre-release
- 1.3.22026-09-28Pyrefly v1.3.2
- 1.4.0-dev.12026-09-19Pyrefly v1.4.0-dev.1pre-release
- 1.2.12026-09-18Pyrefly v1.2.1
Pyrefly
unsigned The latest release, 1.3.2, carries no signature GitHub could verify.
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ty
✓ signed The latest release, 0.0.84, carries a signature GitHub verified.
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