Ruff

Name: Ruff
Brand: Ruff
Rating: 4.6 (5562 reviews)

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Lightning-fast Python linting powered by Rust

Developer Tools Testing & QA Code Review

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4.6(5,562 across the web)

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Reviews onG2

5562 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Fast Python linter

Biggest con

Newer tool

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

4.6/5 across review platforms

What is Ruff?

Editorial review

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.

Available on: Web

LCLouis CorneloupUpdated May 26, 2026 · how we evaluateSourcedocs.astral.sh ↗

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

Ratings Across the Web

4.6(5,562 reviews)

Ruff holds an aggregate rating of 4.6 out of 5 from 5,562 reviews across G2, last checked July 29, 2026.

G25,562 reviews

4.6/5

Ratings aggregated from independent review platforms. Learn more

Key Features

Python linterExtremely fastRust-basedAuto-fixFlake8 compatibleOpen source

Pricing Plans

Pricing checked Aug 19, 2026

Free

100% free and open source
MIT license
10-100x faster than alternatives
800+ built-in rules
Replaces Flake8, Black, isort
Written in Rust

Calculate your cost View full pricing

Is Ruff worth the price?

100/100

Ruff's pricing is exceptionally generous, being entirely free and open source.

This makes it an incredibly fair and accessible option for any Python developer or team. It's best for anyone looking for a high-performance linter without any financial commitment.

Hidden Costs & Gotchas

No hidden costs; it's genuinely free.

How Ruff Compares to Competitors

Unlike commercial linters or IDE features that might come with a cost, Ruff offers all its advanced capabilities for free. Tools like Pylint or Flake8 are also free, but Ruff distinguishes itself with significantly faster performance and a broader rule set, effectively replacing multiple tools without any associated cost.

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4.6/5

Across 5,562 verified user reviews on G2

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Ruff FAQ

How does Ruff improve Python code quality?

Ruff lints Python code with dramatic speed, helping developers quickly identify and fix issues. This performance improvement allows for more frequent and efficient code quality checks within development workflows.

Which teams benefit most from using Ruff?

Teams working on Python projects that require faster linting will find Ruff particularly beneficial. It helps improve performance in development and testing workflows, making it suitable for projects prioritizing speed and efficiency in code review.

How is Ruff's performance compared to other linters?

Ruff is a fast Python linter, powered by Rust, which reimagines Python tools for performance. This Rust-based architecture provides good performance for linting tasks, often outperforming traditional Python-based linters.

What kind of trade-offs should users consider when adopting Ruff?

As a newer and still maturing tool, Ruff may not yet include all possible linting rules. Users should also be aware that adopting Ruff might involve configuration changes and a learning curve due to its distinct approach.

Does Ruff include a free tier?

Ruff is free to use, meaning there is no paid plan required to access its features. This makes it an accessible option for all Python developers looking for a fast linter.

Can Ruff replace multiple existing Python development tools?

Yes, Ruff is designed to replace multiple existing Python development tools, streamlining the linting process. Its active development and growing compatibility aim to consolidate various functions into a single, high-performance solution.

Source: docs.astral.sh

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