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Npm vs Yarn vs pnpm: Package Manager Comparison (2026)

DodaTech Updated 2026-06-23 5 min read

In this tutorial, you'll learn about Npm vs Yarn vs pnpm: package manager comparison (2026). We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

Npm, Yarn, and pnpm are the three leading JavaScript package managers, each with distinct approaches to dependency management. Npm is the default with the largest ecosystem, Yarn introduced deterministic installs and workspaces, and pnpm offers disk-efficient content-addressable storage. This comparison covers speed, disk usage, dependency isolation, and Monorepo support.

Graph TD
  A[JavaScript Package Manager] --> B{Choose}
  B -->|Default, largest ecosystem| C[Npm]
  B -->|Workspaces, deterministic| D[Yarn]
  B -->|Disk efficient, strict| E[pnpm]
  C --> F[Npm registry native]
  C --> G[package-lock.JSON]
  D --> H[Berry (v4)]
  D --> I[PnP or node_modules]
  E --> J[Content-addressable store]
  E --> K[Strict dependency isolation]
  style C fill:#CC3534,color:#fff
  style D fill:#2C8EBB,color:#fff
  style E fill#color:#F69220,color:#fff

At a Glance

Feature Npm Yarn (Berry) pnpm
Lock File package-lock.JSON Yarn.lock pnpm-lock.YAML
Install Strategy Flat node_modules Flat or Plug'n'Play Content-addressable store
Disk Usage High (duplicates) High (duplicates) Low (hard links)
Install Speed Moderate Fast Fastest
Workspaces Built-in (v7+) Built-in (Classic + Berry) Built-in
Plug'n'Play No Yes No
Monorepo Support Npm workspaces Yarn workspaces pnpm workspaces
Security Audit Npm audit Yarn Npm audit pnpm audit
Zero-Install No Yes (PnP + cache) No
Network Resilience Moderate Excellent (cached) Excellent

Installation Performance

pnpm's content-addressable storage uses hard links, making it significantly faster and more disk-efficient than Npm or Yarn.

# Clean install performance benchmark
# Using the same project with 100 dependencies

# Npm
time Npm install
# Result: ~45 seconds, ~350MB disk usage

# Yarn Classic (v1)
time Yarn install
# Result: ~30 seconds, ~340MB disk usage

# pnpm
time pnpm install
# Result: ~18 seconds, ~120MB disk usage (shared store)

# Measure disk usage across package managers
# Create the same project and compare

# Create project structure
mkdir bench && cd bench
echo '{ "name": "bench", "dependencies": { "Express": "^4.18", "React": "^18", "Lodash": "^4", "Axios": "^1" } }' > package.JSON

# Test each manager
for pm in "Npm" "Yarn" "pnpm"; do
  $pm install
  echo "--- $pm disk usage ---"
  du -sh node_modules 2>/dev/null || echo "No node_modules"
  rm -rf node_modules package-lock.JSON Yarn.lock pnpm-lock.YAML
done

Expected output (representative results): --- Npm disk usage --- 240M node_modules --- Yarn disk usage --- 235M node_modules --- pnpm disk usage --- 85M node_modules


## Dependency Resolution

npm (v7+) and Yarn use a flat node_modules with hoisting. pnpm uses a strict content-addressable store with nested node_modules for strict isolation.

```bash
# npm: flat node_modules (hoisting)
# All dependencies are hoisted to the top level
ls node_modules
# <a href="/backend/nodejs/">Express</a>  react  lodash  axios  ... (all visible here)

# A package can require anything at the top level
# This leads to phantom dependencies
node -e "require('lodash')"  # Works even if not in package.json!

# npm ls --all shows the full tree
npm ls --all --depth=1

# pnpm: strict nested node_modules
# Only direct dependencies are at the top level
ls node_modules
# .pnpm  <a href="/backend/nodejs/">Express</a>  react  lodash  axios

# pnpm uses hard links to a global content-addressable store
ls -la node_modules/<a href="/backend/nodejs/">Express</a>
# lrwxrwxrwx ... -> .pnpm/<a href="/backend/nodejs/">Express</a>@4.18.2/node_modules/<a href="/backend/nodejs/">Express</a>

# Dependencies are NOT accessible if not in package.json
node -e "require('lodash')"
# Error: Cannot find module 'lodash'

# pnpm list shows the strict dependency tree
pnpm list --depth=1

Configuration and Scripts

Each package manager has its own configuration style and script execution approach.

// npm: package.json scripts and configuration
{
  "name": "my-app",
  "version": "1.0.0",
  "scripts": {
    "dev": "vite",
    "build": "vite build",
    "preview": "vite preview",
    "lint": "eslint . --ext .js,.ts",
    "test": "vitest run",
    "typecheck": "tsc --noEmit",
    "precommit": "lint-staged"
  },
  "config": {
    "port": "3000"
  },
  "engines": {
    "node": ">=18.0.0",
    "npm": ">=9.0.0"
  }
}

# Yarn Berry: .yarnrc.yml configuration
yarnPath: .yarn/releases/yarn-4.0.0.cjs
nodeLinker: node-modules  # or "pnp" for Plug'n'Play
enableGlobalCache: true

npmRegistryServer: "https://registry.npmjs.org"

logFilters:
  - code: YN0002
    level: discard
  - code: YN0060
    level: discard

packageExtensions:
  react-dom@*:
    dependencies:
      react: "*"

# pnpm: .npmrc configuration
shamefully-hoist=true
strict-peer-dependencies=true
auto-install-peers=true

# Store configuration
store-dir=/home/user/.pnpm-store

# Workspace configuration
link-workspace-packages=true

Monorepo Workspaces

All three package managers support Monorepo workspaces, but with different features and syntax.

// npm: workspace configuration
// Root package.json
{
  "name": "Monorepo",
  "private": true,
  "workspaces": [
    "packages/*",
    "apps/*]
  ],
  "scripts": {
    "build": "npm run build --workspaces --if-present",
    "test": "npm run test --workspaces --if-present",
    "lint": "npm run lint --workspaces --if-present"
  }
}

// Add dependency to specific workspace
npm install lodash -w packages/utils

// Run script in specific workspace
npm run test -w packages/core

# pnpm: workspace with pnpm-workspace.YAML
# pnpm-workspace.YAML
packages:
  - 'packages/*'
  - 'apps/*'
  - 'shared/*'

# Filter commands to specific packages
pnpm --filter @myapp/core run build
pnpm --filter @myapp/* run test

# Add dependency to specific workspace
pnpm add Lodash --filter @myapp/utils

Bottom Line

Choose Npm if you're starting a new project and want the default, most widely supported package manager with the largest ecosystem of tools and documentation. Choose Yarn if you need advanced features like Plug'n'Play, zero-install deployments, or superior Monorepo workspaces. Choose pnpm if you prioritize disk efficiency, strict dependency isolation, and the fastest install times for CI/CD pipelines.

Practice Questions

  1. How does pnpm's content-addressable storage differ from Npm's flat node_modules?
  2. What problem does Yarn's Plug'n'Play (PnP) mode solve?
  3. Which package manager is most disk-efficient for monorepos with many shared dependencies?

FAQ

Can I switch between package managers mid-project?

Yes, but it requires deleting node_modules and the lock file. Run rm -rf node_modules package-lock.json yarn.lock pnpm-lock.yaml, then install with your new package manager. Be aware that lock files produce different dependency trees, so test thoroughly after switching.

Which package manager is fastest for CI/CD pipelines?

pnpm typically has the fastest install times in CI due to its content-addressable store and efficient Caching. Yarn Berry with zero-install (committing the cache to Git) can skip install entirely. Npm is the slowest for clean installs but is well-supported in all CI environments.

Does pnpm work with all Npm packages?

pnpm is compatible with the vast majority of Npm packages. The strict dependency tree can cause issues with packages that rely on phantom dependencies (requiring packages not in their own package.JSON). The shamefully-hoist=true setting in .npmrc resolves most compatibility issues.

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