Comparison

uv vs Yarn

On the evidence we track, uv leads this comparison with a composite score of 67/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

uv full profile →Yarn full profile →

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★uv67

Yarn62

Attribute comparison across 2 tools
Attribute	uvLeader	Yarn
Vioscale score	67 / 100high · 77%	62 / 100medium · 71%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	commercial	commercial
Price levelpricing.price_level	free	free
Integrations
Countintegrations.count	17	-
Security
Scorecardsecurity.scorecard	-	3.4
Vulnerabilitiessecurity.vulnerabilities	Count: 5 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=uv&per_page=100 · Last 12m: 4 · Max severity: MODERATE	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40yarnpkg%2Fparsers&per_page=100 · Last 12m: 0
Reliability
Status pagereliability.status_page	-	✓
Adoption
Dependent reposadoption.dependent_repos	2	13,468
Github starsadoption.github_stars	89,118	8,100
Package downloads weeklyadoption.package_downloads_weekly	44,329,091	9,559,608
Activity
Commits last 30dactivity.commits_last_30d	100	18
Release
Cadence daysrelease.cadence_days	3	15
Historyrelease.history	20 items	20 items
License
Spdxlicense.spdx	Apache-2.0	BSD-2-Clause
Language
Primarylanguage.primary	Rust	TypeScript

Score

Vioscale score

uv67 / 100high · 77%

Yarn62 / 100medium · 71%

Pricing

Free tier

uv✓

Yarn✓

Model

uvcommercial

Yarncommercial

Price level

uvfree

Yarnfree

Integrations

Count

uv17

Yarn–

Security

Scorecard

uv–

Yarn3.4

Vulnerabilities

uvCount: 5 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=uv&per_page=100 · Last 12m: 4 · Max severity: MODERATE

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

Reliability

Status page

uv–

Yarn✓

Adoption

Dependent repos

uv2

Yarn13,468

Github stars

uv89,118

Yarn8,100

Package downloads weekly

uv44,329,091

Yarn9,559,608

Activity

Commits last 30d

uv100

Yarn18

Release

Cadence days

uv3

Yarn15

History

uv20 items

Yarn20 items

License

Spdx

uvApache-2.0

YarnBSD-2-Clause

Language

Primary

uvRust

YarnTypeScript

Capabilities

Feature-by-feature on the axes that matter for package registries. “-” means undocumented, not absent.

Capability comparison for Package Registries
Capability	uv	Yarn
Core
Role	Package manager client	Package manager client
Ecosystem
Ecosystem / language	Python	JavaScript
Deployment
Deployment	CLI-local	CLI-local
Formats
Package formats supported	Many formats	Many formats
Hosting
Private / scoped packages	-	✓
Upstream proxy / caching	-	-
Resolution
Lockfile / deterministic installs	✓	-
Workspaces / monorepo	✓	✓
Content-addressable store	-	-
Supply chain
Supply-chain integrity	✓	-
Vulnerability / licence scanning	-	-
Licensing
Openness	Open-source	Open-source
Pricing
Pricing model	Free / OSS	Free / OSS

Core

Role

uvPackage manager client

YarnPackage manager client

Ecosystem

Ecosystem / language

uvPython

YarnJavaScript

Deployment

uvCLI-local

YarnCLI-local

Formats

Package formats supported

uvMany formats

YarnMany formats

Hosting

Private / scoped packages

uv-

Yarn✓

Upstream proxy / caching

uv-

Yarn-

Resolution

Lockfile / deterministic installs

uv✓

Yarn-

Workspaces / monorepo

uv✓

Yarn✓

Content-addressable store

uv-

Yarn-

Supply chain

Supply-chain integrity

uv✓

Yarn-

Vulnerability / licence scanning

uv-

Yarn-

Licensing

Openness

uvOpen-source

YarnOpen-source

Pricing

Pricing model

uvFree / OSS

YarnFree / OSS

What each one is

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

uv

Leader

A unified command-line tool that consolidates the functionality of multiple Python package management and development utilities into a single interface. It delivers substantially faster dependency resolution and installation compared to traditional package managers.

Independently observed

Yarn

Yarn is a package manager that functions as both a package and project manager, supporting everything from simple projects to industry monorepos for open source developers and enterprise users.

Independently observed

Pricing

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

uv

Leader

Open sourceFree tier

as of 2026-08-14verify ↗

Yarn

Open sourceFree tier

as of 2026-08-13verify ↗

Platform & deployment

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

Platform and deployment support comparison
Supports	uv	Yarn
macOSPlatforms	✓	✗
WindowsPlatforms	✓	✗
LinuxPlatforms	✓	✗
CLIPlatforms	✓	✓
Self-hostedDeployment	✓	✓

Platforms

macOS

uv✓

Yarn✗

Windows

uv✓

Yarn✗

Linux

uv✓

Yarn✗

CLI

uv✓

Yarn✓

Deployment

Self-hosted

uv✓

Yarn✓

Integrations

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

uv

Leader

10 total

Docker
GitHub Actions
GitLab CI/CD
AWS Lambda
Azure Artifacts
AWS CodeArtifact
JFrog Artifactory
PyTorch
FastAPI
Jupyter

Independently observed

Yarn

Not documented yet.

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