Comparison

Qlty vs Ruff

On the evidence we track, Ruff leads this comparison with a composite score of 74/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Qlty full profile →Ruff full profile →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Qlty52

★Ruff74

Attribute comparison across 2 tools
Attribute	Qlty	RuffLeader
Vioscale score	52 / 100medium · 54%	74 / 100high · 76%
Pricing
Free tierpricing.free_tier	✓	-
Modelpricing.model	freemium	commercial
Price levelpricing.price_level	mid	-
Transparentpricing.transparent	✓	-
Integrations
Countintegrations.count	6	6
Security
Gdprsecurity.gdpr	-	✓
Soc2security.soc2	✓	-
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=qlty-cloud&per_page=100 · Last 12m: 0	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=ruff&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	✓	-
Adoption
Dependent reposadoption.dependent_repos	0	5,870
Github starsadoption.github_stars	3,130	49,341
Package downloads weeklyadoption.package_downloads_weekly	-	77,677,334
Activity
Commits last 30dactivity.commits_last_30d	9	100
Release
Cadence daysrelease.cadence_days	4	7
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	-	MIT
Language
Primarylanguage.primary	Rust	Rust
Market
Availabilitymarket.availability	Available worldwide · Popular in US	Available worldwide · Popular in US · HQ US

Score

Vioscale score

Qlty52 / 100medium · 54%

Ruff74 / 100high · 76%

Pricing

Free tier

Qlty✓

Ruff–

Model

Qltyfreemium

Ruffcommercial

Price level

Qltymid

Ruff–

Transparent

Qlty✓

Ruff–

Integrations

Count

Qlty6

Ruff6

Security

Gdpr

Qlty–

Ruff✓

Soc2

Qlty✓

Ruff–

Vulnerabilities

QltyCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=qlty-cloud&per_page=100 · Last 12m: 0

RuffCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=ruff&per_page=100 · Last 12m: 0

Reliability

Status page

Qlty✓

Ruff–

Adoption

Dependent repos

Qlty0

Ruff5,870

Github stars

Qlty3,130

Ruff49,341

Package downloads weekly

Qlty–

Ruff77,677,334

Activity

Commits last 30d

Qlty9

Ruff100

Release

Cadence days

Qlty4

Ruff7

History

Qlty20 items

Ruff20 items

License

Spdx

Qlty–

RuffMIT

Language

Primary

QltyRust

RuffRust

Market

Availability

QltyAvailable worldwide · Popular in US

RuffAvailable worldwide · Popular in US · HQ US

Capabilities

Feature-by-feature on the axes that matter for code quality tools. “-” means undocumented, not absent.

Capability comparison for Code Quality Tools
Capability	Qlty	Ruff
Core
Function	Quality platform	Linter
Language scope	Multi-language	Single-language
Implementation language	Rust	Rust
Capability
Autofix	✓	✓
Config
Config model	Config file	-
Extensibility
Custom rules	✓	-
Deployment
Deployment	Both	CLI-local
Delivery
Editor integration	✓	✓
CI / VCS gating	✓	-
Insight
Code metrics	✓	-
Performance
Incremental / monorepo aware	✓	✓
Licensing
Open-source	Open-core	OSS
Commercial
Pricing model	Per-contributor	Free

Core

Function

QltyQuality platform

RuffLinter

Language scope

QltyMulti-language

RuffSingle-language

Implementation language

QltyRust

RuffRust

Capability

Autofix

Qlty✓

Ruff✓

Config

Config model

QltyConfig file

Ruff-

Extensibility

Custom rules

Qlty✓

Ruff-

Deployment

QltyBoth

RuffCLI-local

Delivery

Editor integration

Qlty✓

Ruff✓

CI / VCS gating

Qlty✓

Ruff-

Insight

Code metrics

Qlty✓

Ruff-

Performance

Incremental / monorepo aware

Qlty✓

Ruff✓

Licensing

Open-source

QltyOpen-core

RuffOSS

Commercial

Pricing model

QltyPer-contributor

RuffFree

What each one is

The product in its own terms, so the numbers below have context.

Qlty

A code quality platform that automatically analyzes pull requests for linting, formatting, security issues, and code coverage with AI-generated fixes. Supports 40+ languages and integrates with GitHub, IDEs, and CI systems.

Independently observed

Ruff

Leader

A fast Python linter built in Rust that consolidates multiple linting tools into a single interface. It supports over 500 rules, provides automated fixes for common issues, and runs significantly faster than traditional Python linters on even very large codebases.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Qlty

from $20/moSubscriptionFree tier

Free plan available. Pro from $20/contributor/month. Enterprise from $30/contributor/month. Annual plans include 2 months free.

FreeFree
- Unlimited public and private repositories
- Unlimited contributors
- 1,000 analysis minutes per month
- 100 AI autofixes per month
- Linting and auto-formatting
- +8 more
Pro$20/contributor/month. Annual billing includes 2 months free.
- Everything in Free, plus:
- Shared configurations
- Trends and hotspots
- 1 year of history
- Accelerated analysis
- +6 more
EnterpriseContact sales
- Everything in Pro, plus:
- Advanced analytics
- Organization policies
- Custom permissions
- Audit logs
- +9 more

as of 2026-08-14verify ↗

Ruff

Leader

Pricing not documented yet.

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Qlty	Ruff
WebPlatforms	✓	✗
macOSPlatforms	✓	✓
WindowsPlatforms	✓	✓
LinuxPlatforms	✓	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✗
Self-hostedDeployment	✗	✓

Platforms

Web

Qlty✓

Ruff✗

macOS

Qlty✓

Ruff✓

Windows

Qlty✓

Ruff✓

Linux

Qlty✓

Ruff✓

CLI

Qlty✓

Ruff✓

Deployment

Cloud / SaaS

Qlty✓

Ruff✗

Self-hosted

Qlty✗

Ruff✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

Qlty

6 total

GitHub
Visual Studio Code
GitHub Actions
CircleCI
Chrome
Firefox

Independently observed

Ruff

Leader

6 total

Flake8
isort
Autoflake
Pyflakes
pycodestyle
Pylint

Independently observed

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.