Comparison

Biome vs Qlty

On the evidence we track, Biome leads this comparison with a composite score of 68/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Biome full profile →Qlty full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

★Biome68

Qlty54

Attribute comparison across 2 tools
Attribute	BiomeLeader	Qlty
vioscaleAI score	68 / 100medium · 68%	54 / 100low · 49%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	freemium
Price levelpricing.price_level	low	mid
Starting pricepricing.starting_price	-	$20
Transparentpricing.transparent	✗	✓
Integrations
Countintegrations.count	3	6
Security
Certificationssecurity.certifications	-	SOC 2 Type II
Soc2security.soc2	-	✓
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40biomejs%2Fbiome&per_page=100 · Last 12m: 0	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=cargo&package_name=qlty-llm&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	587	0
Github starsadoption.github_stars	25,952	3,186
Package downloads weeklyadoption.package_downloads_weekly	17,944,016	-
Activity
Commits last 30dactivity.commits_last_30d	100	45
Release
Cadence daysrelease.cadence_days	6	2
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	Apache-2.0	-
Language
Primarylanguage.primary	Rust	C
Market
Availabilitymarket.availability	Available worldwide	Available worldwide · Popular in US
Content
Faqcontent.faq	5 items	7 items

Score

vioscaleAI score

Biome68 / 100medium · 68%

Qlty54 / 100low · 49%

Pricing

Free tier

Biome✓

Qlty✓

Model

Biomefreemium

Qltyfreemium

Price level

Biomelow

Qltymid

Starting price

Biome–

Qlty$20

Transparent

Biome✗

Qlty✓

Integrations

Count

Biome3

Qlty6

Security

Certifications

Biome–

QltySOC 2 Type II

Soc2

Biome–

Qlty✓

Vulnerabilities

BiomeCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40biomejs%2Fbiome&per_page=100 · Last 12m: 0

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

Reliability

Status page

Biome–

Qlty✓

Adoption

Dependent repos

Biome587

Qlty0

Github stars

Biome25,952

Qlty3,186

Package downloads weekly

Biome17,944,016

Qlty–

Activity

Commits last 30d

Biome100

Qlty45

Release

Cadence days

Biome6

Qlty2

History

Biome20 items

Qlty20 items

License

Spdx

BiomeApache-2.0

Qlty–

Language

Primary

BiomeRust

QltyC

Market

Availability

BiomeAvailable worldwide

QltyAvailable worldwide · Popular in US

Content

Faq

Biome5 items

Qlty7 items

Capabilities

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

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

Core

Function

BiomeLinter + formatter

QltyQuality platform

Language scope

BiomeMulti-language

QltyMulti-language

Implementation language

BiomeRust

QltyRust

Capability

Autofix

Biome✓

Qlty✓

Config

Config model

BiomeZero-config

QltyConfig file

Extensibility

Custom rules

Biome-

Qlty✓

Deployment

BiomeCLI-local

QltyBoth

Delivery

Editor integration

Biome✓

Qlty✓

CI / VCS gating

Biome✓

Qlty✓

Insight

Code metrics

Biome-

Qlty✓

Performance

Incremental / monorepo aware

Biome-

Qlty✓

Licensing

Open-source

BiomeOSS

QltyOpen-core

Commercial

Pricing model

BiomeFree

QltyPer-contributor

What each one is

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

Biome

Leader

An all-in-one code formatter and linter built with Rust that can format code, identify issues, and improve code quality with high performance and minimal setup required.

Independently observed

Qlty

A code quality and coverage platform combining linting, auto-formatting, security scanning, duplication detection, and code coverage analysis with AI-powered fix suggestions, deployed as a cloud service with a local CLI.

Independently observed

Pricing

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

Biome

Leader

HybridFree tier

Open source with optional commercial support available

as of 2026-10-14verify ↗

Qlty

from $20/contributor/moHybridFree tier

Free plan available. Pro from $20/contributor/month. Enterprise $30/contributor/month with volume discounts (5% off 100+ seats, 10% off 200+ seats annually).

FreeFree
- Linting & auto-formatting
- Code coverage
- Maintainability & duplication
- Open, extensible Rust CLI
- Unlimited private/public contributors
- +1 more
Pro$20/contributor/month
- Everything from Free
- Shared configurations
- Trends & hotspots
- One year of history
- Accelerated analysis
- +10 more
EnterpriseContact sales
- Everything from Pro
- Advanced analytics
- Organization policies
- Custom permissions
- Audit logs
- +6 more

as of 2026-10-14verify ↗

Platform & deployment

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

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

Platforms

Web

Biome✗

Qlty✓

macOS

Biome✗

Qlty✓

Windows

Biome✗

Qlty✓

Linux

Biome✗

Qlty✓

CLI

Biome✓

Qlty✓

Deployment

Cloud / SaaS

Biome✗

Qlty✓

Self-hosted

Biome✓

Qlty✗

Integrations

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

Biome

Leader

3 total

ESLint
TypeScript ESLint
Prettier

Independently observed

Qlty

6 total

GitHub
Visual Studio Code
GitHub Actions
CircleCI
Chrome
Firefox

Independently observed

Still deciding?

Biome or Qlty: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

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