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Pyrefly

alternative to mypy, Pyright

Pyrefly

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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

unsigned The latest release, 1.3.2, carries no signature GitHub could verify.

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mypyWritten in Rust, with a language server for editors.Full replacement
PyrightType checker and language server written in Rust.Full replacement

About

A fast type checker and language server for Python

RustPython type checkersMIT

Owner: Meta organisation
Stars: 7k
Forks: 539
Latest: 1.3.2
Last push: 2026-10-06
Terms: Open source
Created: 2025, 1 year ago
Active contributors: 39+ commit authors on the default branch in the last 90 days
Platforms: Linux (x86_64, arm64, x86), macOS (x86_64, arm64), Windows (x86_64, arm64, x86)
Stars over 12 days: 2026-09-25 7,0152026-10-06 7,049

Read from GitHub on 2026-10-06.Entry last edited on 2026-09-25.

Compare Pyrefly and mypy →

#code-quality#ide#language-server#language-server-protocol#lsp#python#rust#type-annotations

github.com/facebook/pyrefly ↗Website ↗Edit this entry Changes to Pyrefly (RSS)

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