# Ruff

> Lint at lightspeed

- **Canonical URI:** https://www.vioscale.ai/software/ruff
- **Category:** Code Quality Tools
- **Homepage:** https://astral.sh/ruff
- **Also known as:** ruff
- **Profile claimed by vendor:** no
- **Last updated:** 2026-08-05T14:31:07.764Z

## Vioscale score

**68.8 / 100**, confidence 35% (low).

Composite of weighted, independently-sourced signals (no user reviews, no vendor payment).

| Signal | Score | Weight | Contribution | Evidence present |
|---|--:|--:|--:|:--:|
| price_level | 0 | 0.046 | 0 | - |
| reliability | 0 | 0.062 | 0 | - |
| capabilities | 28.9 | 0.123 | 3.6 | ✓ |
| github_stars | 88.5 | 0.038 | 3.4 | ✓ |
| integrations | 13.7 | 0.062 | 0.9 | ✓ |
| github_activity | 63.1 | 0.138 | 8.7 | ✓ |
| release_cadence | 96.1 | 0.077 | 7.4 | ✓ |
| security_posture | 5 | 0.1 | 0 | - |
| package_downloads | 100 | 0.2 | 20 | ✓ |
| pricing_transparency | 0 | 0.062 | 0 | - |
| stackoverflow_activity | 0 | 0.092 | 0 | - |

## About

An extremely fast Python linter written in Rust that supports over 500 rules with powerful autofix capabilities. Replaces dozens of tools with a single, unified interface.

_Independently observed._

## Platform & deployment

- **Platforms:** CLI
- **Deployment:** Self-hosted

## Integrations (2)

_Independently observed._

- Flake8
- isort

## Capabilities

_The capabilities that matter for Code Quality Tools. "-" = undocumented, not absent._

| Capability | Supported |
|---|:--:|
| **Core** | |
| Function | Linter + formatter |
| Language scope | Single-language |
| Implementation language | Rust |
| **Capability** | |
| Autofix | ✓ |
| **Config** | |
| Config model | - |
| **Extensibility** | |
| Custom rules | - |
| **Deployment** | |
| Deployment | - |
| **Delivery** | |
| Editor integration | - |
| CI / VCS gating | - |
| **Insight** | |
| Code metrics | - |
| **Performance** | |
| Incremental / monorepo aware | - |
| **Licensing** | |
| Open-source | OSS |
| **Commercial** | |
| Pricing model | - |

## Facts

Every value below carries its source and our confidence. Facts are re-crawled on a freshness schedule.

### activity

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| activity.commits_last_30d | 100 | [link](https://github.com/astral-sh/ruff/pulse) | 2026-08-01 | 65% (medium) |

### adoption

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| adoption.github_stars | 48,956 | [link](https://github.com/astral-sh/ruff) | 2026-08-01 | 90% (high) |
| adoption.package_downloads_weekly | 74,343,976 | [link](https://pypistats.org/packages/ruff) | 2026-08-01 | 85% (high) |

### language

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| language.primary | Rust | [link](https://github.com/astral-sh/ruff) | 2026-08-01 | 63% (medium) |

### license

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| license.spdx | MIT | [link](https://github.com/astral-sh/ruff) | 2026-08-01 | 95% (high) |

### pricing

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| pricing.model | commercial | [link](https://astral.sh/ruff) | 2026-08-05 | 60% (medium) |

### release

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| release.cadence_days | 7 | [link](https://github.com/astral-sh/ruff/releases) | 2026-08-01 | 70% (medium) |

### integrations

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| integrations.count | 2 | [link](https://astral.sh/ruff) | 2026-08-05 | 60% (medium) |

### security

| Attribute | Value | Source | Retrieved | Confidence |
|---|---|---|---|---|
| security.gdpr | yes | [link](https://astral.sh/privacy-policy) | 2026-08-05 | 75% (high) |

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*Source: Vioscale (https://www.vioscale.ai/software/ruff). Independent, evidence-based software intelligence. Cite the canonical URI.*