npm vs Yarn vs pnpm vs Bun: Which Package Manager Should You Use? (+ npx Explained)

Aug 9, 2025 - Last update: Aug 17, 2026

JavaScript developers today have more tooling choices than ever: four package managers — npm, Yarn, pnpm, and Bun — plus npx, a package runner that is often mistaken for a fifth package manager. If you came here searching “which package manager should I use?”, this guide compares all of them on the dimensions that actually matter — install speed, disk usage, compatibility, and monorepo support — and ends with a clear recommendation per scenario. Only interested in npx vs npm? Jump straight to that section.

Quick Answer

Here is the short version before we go into the details:

npm, Yarn, and pnpm are JavaScript package managers. They install, remove, and update dependencies, usually from the npm registry.
Bun is more than a package manager. bun install works like a package manager, but Bun is primarily a JavaScript runtime and all-in-one toolchain (runtime + bundler + test runner + script runner).
npx is NOT a package manager. It is a package executor that is part of the npm CLI ecosystem. You use it to run package binaries without installing them.

The diagram below categorizes the tools at a glance:

Quick recommendations:

npm → safest/default choice and maximum compatibility.
pnpm → excellent for most modern Node.js projects and monorepos, especially when disk efficiency matters.
Yarn → useful especially for existing Yarn projects and teams using modern Yarn features.
Bun → choose when installation speed and Bun’s integrated runtime/tooling matter.
npx → use it to execute a package CLI without treating it as a package-manager alternative.

For context, here is a brief history of these tools:

npm was the first official package manager and shipped with Node.js. Yarn appeared in 2016 to fix early npm pain points (slow sequential installs and a missing lockfile). pnpm (2017) focused on storage efficiency and speed, and Bun (2022) is the newest entrant: an all-in-one runtime and toolchain that also ships a package manager. npx was introduced with npm 5.2+ and is part of the npm CLI.

npm vs Yarn vs pnpm vs Bun: Comparison Table

The table below is the fastest way to make a decision. If it answers your question, you can stop here — the rest of the article explains the reasoning behind each choice.

Tool	What it is	Install speed	Disk usage	Compatibility	Monorepo	Best for
npm	Default package manager bundled with Node.js	Moderate	High — copies packages into every project	Excellent — the reference implementation	Workspaces (basic)	Safe default, maximum compatibility
pnpm	Performant package manager with a global content-addressable store	Very fast	Low — hard links from a single store	Very high — drop-in npm replacement	First-class workspaces	Disk efficiency and monorepos
Yarn	Package manager (Classic v1 and modern Berry)	Fast	Moderate (Classic); low with Plug’n’Play	High	First-class workspaces (esp. Berry)	Existing Yarn projects, modern Yarn features
Bun	Package manager + JavaScript runtime and toolchain	Fastest	Low — shared cache and hard links	Good, but newer — verify native modules and Node.js API coverage	Workspaces available	Install speed and integrated runtime/tooling
npx	Package executor, not a package manager	N/A	N/A	Runs any npm-registry CLI via npm	N/A	Running package CLIs without installing them

What Is the Difference Between npm and npx?

npm is a package manager: it downloads packages from the registry, installs them into node_modules, and records them in package.json. npx is a package runner: it executes the binary of a package without requiring a global install and without adding the package to your project’s dependencies.

npx has been bundled with npm since version 5.2, and since npm v7 it is essentially a wrapper around the npm exec command:

A typical example: to run the jest binary you would normally write a script in package.json or call node_modules/.bin/jest. With npx you simply run:

npm install -D jest      # add jest as a devDependency
npx jest --version       # run the jest binary without a global install

npx resolves binaries inside node_modules/.bin automatically, so you do not need to touch $PATH.

Does npx still “download, run, and remove” packages? That description comes from early npx. Modern npx / npm exec fetches the package on demand and keeps it in the npm cache, so repeated runs are fast, and it does not add the package to your project’s dependencies. If the binary is already installed locally, npx uses it directly:

Do you need to install npx separately? No. npx ships with npm — there is nothing extra to install. The old npm install -g npx advice installs a deprecated standalone package and should be avoided.

What happened to the old npx flags? --no-install and --ignore-existing were removed when npm v7 introduced npm exec. To run only an already-installed package, use npx --no <pkg>. Options such as --package must be placed before positional arguments.

The classic comparison that motivates npx:

# old way: install globally, then run
npm install -g create-react-app
create-react-app my-app

# with npx: fetch and run on demand
npx create-react-app my-app

The old way pollutes your global environment; the npx way keeps it clean.

You can also pin the exact version of a tool you want to run:

npx -p [email protected] node -v

npx vs npm exec argument parsing

When run via the npx binary, all options must come before positional arguments, while npm exec parses npm’s own options first:

npx foo@latest bar --package=@npmcli/foo      # runs: foo bar --package=@npmcli/foo
npm exec foo@latest bar --package=@npmcli/foo # resolves @npmcli/foo, then runs: foo@latest bar

Use the double-hyphen -- to stop npm from parsing switches: npm exec -- foo@latest bar --package=@npmcli/foo is equivalent to the npx example.

npx main features summarized

On-demand execution — runs package binaries without global installs, keeping your global environment clean.
Automatic path resolution — finds executables in node_modules/.bin, no manual $PATH changes needed.
Version pinning — lets you specify the exact tool or Node.js version to run (e.g. npx -p [email protected] node -v).
Caching — fetched packages are cached, so repeated invocations are fast after the first run.

npm: Best Default for Compatibility

npm is the default package manager bundled with Node.js and the world’s largest software registry. It consists of three components:

the website: https://www.npmjs.com
the Command Line Interface (CLI): https://docs.npmjs.com/cli/v11/commands/npm
the registry: https://registry.npmjs.org/

Basic usage is as simple as:

npm install express

npm is installed automatically with Node.js. Because npm is released more frequently than Node.js, update it separately with:

npm install npm@latest -g

All of the other package managers in this article — Yarn, pnpm, and Bun — install from the same registry by default:

Use npm when you want the path of least resistance: it is pre-installed wherever Node.js is, and virtually every tool, CI provider, and tutorial supports it.

pnpm: Best for Disk Efficiency and Monorepos

pnpm — short for performant npm — is a high-performance Node.js package manager released by Zoltan Kochan in 2017. It is known for speed and, above all, disk-space efficiency.

To understand the difference, compare how npm/Yarn and pnpm lay out dependencies. npm and Yarn copy each dependency into every project’s node_modules:

Project1
└── node_modules
    ├── package-A
    │   └── node_modules
    │       └── [email protected]
    └── package-B
        └── node_modules
            └── [email protected]
Project2
└── node_modules
    ├── package-A
    │   └── node_modules
    │       └── [email protected]
    └── package-B
        └── node_modules
            └── [email protected]

The identical shared-package is stored in multiple locations — a waste of disk space. pnpm stores each package version exactly once in a global store and links to it. You can locate the store with pnpm store path:

Project
└── node_modules
    └── [email protected]  →  link into the .pnpm folder

node_modules
├── .pnpm
│   └── [email protected]
│       └── node_modules
│           └── [email protected]  →  hard link to the global store

A hard link is a direct pointer to the physical data on a disk, while a soft link (symbolic link) is a pointer to a file path.

Feature	Hard Link	Soft Link (Symbolic Link)
Pointers to	Data on disk (same inode)	File path (new inode)
Deletion of Original	Data remains until all links are removed	Link breaks (dangles)
Cross-Filesystem	No	Yes
Directories	No	Yes
Behavior	All links are equal; no “original” link	The link is a shortcut to the “original” file

pnpm also provides the features Yarn brought to the table, and more:

Security — pnpm verifies the checksums of all installed packages before executing their code.
Offline mode — downloaded package tarballs are kept in a local mirror; use --offline to disable all HTTP requests.
Speed — pnpm is often faster than both npm and Yarn in benchmarks with cold and warm caches, because it links from the global store instead of copying from a cache.
Monorepos — first-class workspace support (filtered installs, --filter), which is why pnpm is a common choice for monorepos.

Yarn: When Does Yarn Still Make Sense?

Yarn Classic (v1) was released in 2016 to fix real problems in early npm:

Non-deterministic installs — npm had no lockfile until version 5, so installs could resolve differently across machines. Yarn introduced yarn.lock.
Slow sequential installs — Yarn installed packages in parallel and added an offline cache.
Clunky CLI semantics — Yarn introduced more semantic commands such as yarn add and yarn remove, plus cleaner output.

Back then, “Yarn is a better version of npm” was fair. That statement is outdated today. npm caught up: package-lock.json (since v5), npm ci for reproducible CI installs, parallelized downloads, and faster installs generally closed the gap. If your main reason to pick Yarn was “npm is bad”, that reason no longer holds.

What keeps Yarn relevant is its modern line — Yarn 2+/3+/4, known as Yarn Berry:

Plug’n’Play (PnP) — dependencies are resolved from a .pnp.cjs file instead of a node_modules folder, which speeds up installs and reduces disk usage.
Workspaces and constraints — robust monorepo tooling, including rule-based dependency management with constraints.
Zero-install — dependencies can be committed to the repository, so CI barely needs to install anything (a philosophy that fits npm’s own caching nowadays too).
yarn dlx — Yarn’s answer to npx for running a package binary on demand.

Yarn Classic (v1) is in maintenance mode and is not recommended for new projects. Choose Yarn when you already have a Yarn codebase or when your team specifically relies on Berry features such as PnP or constraints.

Bun: Fast Package Manager + JavaScript Runtime

Bun is an all-in-one toolkit for JavaScript and TypeScript, delivered as a single executable named bun. Unlike the other tools in this article, Bun is primarily a JavaScript runtime (created by Jarred Sumner), and its package manager is only one part of a larger toolchain:

runtime (bun run <file>)
package manager (bun install, bun add, bun remove, bun update)
bundler (bun build)
test runner (bun test)
script runner (bun run <script>)

It is written in Zig and powered by JavaScriptCore, which keeps startup time and memory usage low compared to the Node.js-based toolchain.

Get started with:

# Install bun
npm i bun -g

# Check the version
bun --version

# Upgrade bun
bun upgrade

The Bun CLI includes a test runner, script runner, and a Node.js-compatible package manager, all often faster than the older tools in benchmarks. They can be used in existing Node.js projects with almost no changes:

Command	Description
`bun init`	Initialize a Bun project
`bun <file>`	Run a file
`bun run <script>`	Run a script
`bun build <file>`	Bundle a file
`bun test <file>`	Test a file
`bun link`	Register the current package as a “linkable” package
`bun install`	Install all packages
`bun add <pkg>`	Install a package
`bun remove <pkg>`	Uninstall a package
`bun update <pkg>`	Update a package

Why is Bun fast? Its package manager benefits from:

A text-based lockfile (bun.lock) that is fast to generate and parse.
A node_modules layout built on hard links and symbolic links, similar to pnpm.
Parallelized dependency resolution and downloading, plus an efficient cache.

Bun limitations to know about

Before adopting Bun, verify these points against your project:

Native modules (*.node) — support is evolving; some complex native modules may have compatibility issues.
Node.js API coverage — compatibility is high, but some niche or very new Node.js APIs may not be fully implemented yet.
Windows support — Bun runs natively on Windows and no longer requires WSL2 for typical use, but verify native modules and platform-specific tooling on the OS you deploy to.
Ecosystem maturity — the core is stable, but some Bun-specific plugins and tools are still evolving.

Bun is a great fit for new projects and for teams that want a single fast toolchain. For large, complex existing projects, run a thorough test on Bun before committing to it.

Installation Speed and Disk Usage

Here is how the tools differ under the hood when it comes to speed and disk usage:

npm and Yarn Classic copy each dependency into every project’s node_modules. Disk usage grows with the number of projects, and installs involve copying files from the cache.
pnpm stores each package version once in a global content-addressable store and hard-links it into projects. This minimizes disk usage and makes installs fast — the strongest choice when disk space matters or when you work on many projects.
Bun uses a shared cache and hard links similar to pnpm, plus a text-based lockfile and parallel downloads, which often gives it the fastest cold installs in benchmarks.
Yarn Berry (PnP) avoids materializing node_modules at all, which also cuts install time and disk usage — at the cost of a different resolution model.

The following is an official performance comparison between npm, Yarn, and pnpm from the pnpm project:

The takeaway: performance depends on cache state, filesystem, dependency graph, and project. If you can choose freely, measure on your own project before committing. As a rough starting point in many benchmarks, pnpm and Bun tend to lead on cold install speed, and pnpm/Bun are typically more disk-efficient while npm/Yarn generally use more disk space.

Command Cheat Sheet: npm vs Yarn vs pnpm vs Bun

Task	npm	pnpm	Yarn	Bun
Install dependencies	`npm install`	`pnpm install`	`yarn install`	`bun install`
Add package	`npm install react`	`pnpm add react`	`yarn add react`	`bun add react`
Add dev dependency	`npm install -D vite`	`pnpm add -D vite`	`yarn add -D vite`	`bun add -d vite`
Run script	`npm run dev`	`pnpm dev`	`yarn dev`	`bun run dev`
Execute package	`npx ...` / `npm exec`	`pnpm dlx`	`yarn dlx`	`bunx`
Remove a dependency	`npm uninstall react`	`pnpm remove react`	`yarn remove react`	`bun remove react`
Update a dependency	`npm update react`	`pnpm update react`	`yarn upgrade react`	`bun update react`
Install globally	`npm install -g <pkg>`	`pnpm add -g <pkg>`	`yarn global add <pkg>`	`bun add -g <pkg>`
Initialize a project	`npm init -y`	`pnpm init`	`yarn init -y`	`bun init`

Searching for the npx equivalent of another tool? Here it is:

pnpm equivalent of npx → pnpm dlx <pkg>
Yarn equivalent of npx → yarn dlx <pkg>
Bun equivalent of npx → bunx <pkg>

All three run a package binary on demand without adding it to your project’s dependencies, exactly like npx.

Which Package Manager Should You Use?

Choose npm if…

You want the built-in default with zero extra setup — it ships with Node.js.
You need maximum compatibility with existing tooling, CI, and documentation.
You’re working on a small or simple project and do not want to add another tool to the stack.

Choose pnpm if…

You want the best all-round choice for most modern Node.js projects.
You work on monorepos and want first-class workspaces.
Disk space is limited or you maintain many local projects that share dependencies.
You want faster installs than npm without changing your runtime.

Choose Yarn if…

You already have an existing Yarn project — there is no need to migrate away.
Your team is invested in modern Yarn features: Plug’n’Play, zero-install, or constraints.
You run a monorepo on Yarn Berry and it works well for you.

Choose Bun if…

Installation speed matters most to you (and your project passes Bun’s compatibility checks).
You are building on the Bun runtime and want one integrated toolchain for running, bundling, testing, and packaging.
You are starting a new project and are willing to verify native modules and Node.js API coverage.

Which Should You Use in 2026?

Clear, scenario-based recommendations:

Beginner or small Node.js project → npm. It is already installed, every tutorial and tool supports it, and there is no configuration overhead.
Existing enterprise project → Keep the tool you already use. Migrating a mature codebase is a project in itself; if you do migrate, pnpm is the strongest drop-in candidate because it is npm-compatible.
Monorepo → pnpm (or Yarn Berry). Both have first-class workspaces; pnpm wins on disk efficiency and speed, while Yarn Berry offers PnP and constraints.
Many local projects / limited disk space → pnpm. Its content-addressable store keeps a single copy of each package version, saving gigabytes over time.
CI where install speed matters → pnpm. It is significantly faster than npm on both cold and warm caches; benchmark Bun too if you can accept its compatibility trade-offs.
Bun-based project → Bun end to end. Use its runtime, test runner, bundler, and package manager so the whole toolchain shares one fast core.
One-off CLI command → npx (or pnpm dlx / yarn dlx / bunx in the corresponding project). Run the binary without adding it as a dependency.

Bottom line for 2026: pnpm is the strongest default for most new Node.js projects, npm remains the safest, most compatible option with zero extra tooling, and Bun is the pick when you want maximum speed and an integrated runtime.

FAQ

Is npx the same as npm?

No. npm is a package manager that installs and manages dependencies, while npx is a package runner bundled with npm that executes binaries on demand. Use npm to manage dependencies and npx to run a package’s CLI without installing it.

Is npx a package manager?

No. npx does not install or manage dependencies; it fetches and executes package binaries. Since npm v7 it is effectively a wrapper around npm exec. Treat it as a runner, not a package manager.

Is pnpm faster than npm?

In many benchmarks, yes. pnpm downloads and hard-links packages from a global content-addressable store instead of copying them into each project, which often makes both cold and warm installs faster than npm. The gap is usually largest on big projects and in CI, though real-world results depend on cache state, filesystem, and dependency graph.

Is pnpm better than Yarn?

It depends. For most modern Node.js projects and monorepos, pnpm offers comparable features (workspaces, offline mode, checksums) with strong disk efficiency and often faster installs. If your team already relies on Yarn Berry features such as Plug’n’Play or constraints, staying with Yarn can make more sense.

Is Bun faster than pnpm?

In many benchmarks, yes. Bun often posts the fastest installs — especially cold installs — thanks to parallel downloads, hard links, and a text-based lockfile, though results vary with cache state, filesystem, and dependency graph. pnpm is usually the fastest npm-compatible option. Measure on your own project before switching.

Can Bun replace npm?

For many projects, yes. Bun’s package manager supports the npm registry, a text-based lockfile (bun.lock), and workspaces, and its runtime covers most Node.js APIs. Some native modules and niche Node.js APIs may lag, so test first on complex existing projects.

Can I use pnpm with packages from npm?

Yes. pnpm installs from the public npm registry by default, so any package available to npm works with pnpm. You can change registries with pnpm config set registry <url>.

What is the pnpm equivalent of npx?

pnpm dlx <pkg>. It downloads and runs a package binary without adding it to your project’s dependencies, just like npx.

What is the Bun equivalent of npx?

bunx <pkg>. It runs a package binary from the registry on demand. Yarn’s equivalent is yarn dlx.

Which JavaScript package manager should I use?

For most new Node.js projects, pnpm is a strong default: fast, disk-efficient, and excellent for monorepos. Choose npm if you want the safest, most compatible option with zero extra setup, and Bun if you want maximum speed plus an integrated runtime and toolchain.

Conclusion

Choosing a package manager is a practical decision, not a popularity contest:

npm is the safest default: it ships with Node.js and has maximum compatibility.
pnpm is the best all-round choice for most modern projects and monorepos thanks to its disk efficiency and often faster installs.
Yarn remains relevant for existing Yarn codebases and teams using modern Yarn features.
Bun is often the fastest in benchmarks when you also want an integrated runtime and toolchain — test it on complex projects first.
npx is not a package manager. Use it (or its equivalents pnpm dlx, yarn dlx, bunx) to run package CLIs on demand.

Start with the comparison table and the scenario recommendations near the top of this article; dive into the per-tool sections when you want the details behind each choice.

Thanks for reading — I hope this helps. If you spot an error or have a suggestion, let me know.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

👨‍💻 npx
👨‍💻 npm
👨‍💻 yarn
👨‍💻 pnpm
👨‍💻 bun

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!