A fast type checker and language server for Python
⚡ Executive Summary & Quick Facts
Authoritative Sourcepyrefly is pyrefly is an open-source project written in Rust: A fast type checker and language server for Python..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), meta/pyrefly has accumulated 7,189 GitHub stars and 593 forks. It is written in Rust, licensed under MIT, and ranks #2,206 globally. It is actively maintained with the latest commit recorded on Nov 9, 2026.”
| Repository | meta/pyrefly ↗ |
|---|---|
| Primary Category | code quality |
| Language & Stack | Rust |
| Software License | MIT |
| Community Traction | ★ 7.2K stars · ⑂ 593 forks · #2,206 globally |
| Maintenance | ● Active (Last commit: Nov 9, 2026) · 588 open issues |
| Target Audience | Developers and engineering teams building with Rust, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 92/100 · Grade AYes, pyrefly is actively maintained. Continuous telemetry recorded the last code commit on Nov 9, 2026 (4 days ago). Supported by 7,189 stars and 593 community forks, this repository holds a calculated health index of 92/100, reflecting very active (commits within last 14 days) and active community feedback (588 open).
Star History
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+151
STARS · LAST 30 DAYS
5
PER DAY
#229
MOST-STARRED Rust
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +15 | +151 | +450 |
| Per day | 2 | 5 | 5 |
| Forks gained | +11 | +63 | +30 |
pyrefly gained 151 stars in the last 30 days, about 5 a day, and now has 7.2K. It is about 2 years old and has averaged roughly 3.6K stars a year. It ranks #229 among Rust repositories and #2,206 across all languages on GitHubRepo.
Trending Record
45
DAYS ON TRENDING
#324
BEST RANK
Sep 23, 2026
FIRST APPEARANCE
Active
STATUS TODAY
pyrefly has maintained a continuous presence across global trending indexes, peaking at #324. Below is the 30-day activity profile:
💡 Overview
pyrefly is an open-source project written in Rust: A fast type checker and language server for Python.
Engineered for speed, consistency, and developer ease, it solves common hurdles in code-quality, ide, language-server. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Rust for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ cargo install pyrefly⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Rust toolchain (rustc / cargo >= 1.70)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
pyrefly coordinates its core functionality through a modular Rust pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed pyrefly into Rust backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open MIT license.
🚀 Getting Started
Install pyrefly using your package manager: `cargo install pyrefly`
Initialize your project workspace or configuration file for pyrefly.
Import pyrefly into your codebase or invoke it directly from your terminal.
Execute your test suite or run `pyrefly --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Rust, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
meta/pyrefly is currently ranked #2,206 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,201 | beenuar/AiSOC | Python | ★ 7.2K | Compare ↗ |
| #2,202 | HandyOrg/HandyControl | C# | ★ 7.2K | Compare ↗ |
| #2,203 | react-native-webview/react-native-webview | TypeScript | ★ 7.2K | Compare ↗ |
| #2,204 | dotnet/reactive | C# | ★ 7.2K | Compare ↗ |
| #2,205 | bleachbit/bleachbit | Python | ★ 7.2K | Compare ↗ |
| #2,206 | meta/pyrefly This Project | Rust | ★ 7.2K | |
| #2,206 | RsaCtfTool/RsaCtfTool | Python | ★ 7.2K | Compare ↗ |
| #2,208 | DenverCoder1/github-readme-streak-stats | PHP | ★ 7.2K | Compare ↗ |
| #2,209 | lance-format/lance | Rust | ★ 7.2K | Compare ↗ |
| #2,210 | node-formidable/formidable | JavaScript | ★ 7.2K | Compare ↗ |
| #2,210 | plainhub/plain-app | Kotlin | ★ 7.2K | Compare ↗ |
Frequently Asked Questions
What does pyrefly do? +
A fast type checker and language server for Python
Is pyrefly actively maintained in 2026? +
Yes, pyrefly is actively maintained. The latest code push was recorded on Nov 9, 2026 (4 days ago). It holds a calculated Maintenance Health Score of 92/100 (A rating) with 7,189 stars and 588 open issues.
What language is pyrefly written in? +
The primary language is Rust. Topics include: code-quality, ide, language-server, language-server-protocol, lsp.
How many stars does pyrefly have? +
pyrefly has 7,189 stars and 593 forks on GitHub.
How does pyrefly rank among GitHub repositories? +
With 7,189 stars, meta/pyrefly is ranked #2,206 globally across all repositories tracked on GitHubRepo and #229 among Rust projects.
What license is pyrefly distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
