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TL;DR - Ruff
- Ruff is an extremely fast Python linter and formatter written in Rust
- It replaces Flake8, isort, and Black with 10-100x faster performance
- Completely free and open-source
Pricing: Free forever
Best for: Individuals & startups
Pros & Cons
Pros
- Fast Python linter
- Rust-based
- Replaces multiple tools
- Active development
- Good performance
Cons
- Newer tool
- Not all rules yet
- Configuration changes
- Learning curve
- Still maturing
Key Features
Python linterExtremely fastRust-basedAuto-fixFlake8 compatibleOpen source
Pricing Plans
Free
Free
- 100% free and open source
- MIT license
- 10-100x faster than alternatives
- 800+ built-in rules
- Replaces Flake8, Black, isort
- Written in Rust
About Ruff
By Toolradar Team·
Ruff lints Python with dramatic speed. Rust-powered Python linting—Python tools reimagined for performance.
The speed is transformative. The compatibility is growing. The adoption is accelerating.
Python projects wanting faster linting adopt Ruff for performance improvement.
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Ruff FAQ
Is Ruff free?
Yes, Ruff is completely free and open source. MIT license. Made by Astral.
What is Ruff?
Ruff is an extremely fast Python linter written in Rust. Replaces Flake8, isort, and more. 10-100x faster.
Ruff vs Flake8?
Ruff is much faster and has more rules built-in. Flake8 requires plugins. Ruff is the modern choice.
Can Ruff format code?
Yes, Ruff includes a formatter compatible with Black. Single tool for linting and formatting Python.
Source: docs.astral.sh