npm vs Yarn in 2026: Which package manager should you choose?

npm and Yarn are the two most established package managers for JavaScript and Node.js, and in 2026 the honest answer is that both are fast, secure, and production-ready. npm ships with Node.js and is the default choice for most projects, while Yarn 4 offers Plug'n'Play resolution, strong monorepo workspaces, and strict dependency guarantees that large teams value.

Quick verdict

• Best default for most projects: npm. It comes bundled with Node.js, and version 11 closes most historical gaps in speed and security.
• Best for large monorepos and strict dependency control: Yarn 4 (Berry), with Plug'n'Play, workspaces, and constraints.
• Also worth evaluating: pnpm for install speed and disk efficiency, and Bun if raw speed matters more than ecosystem maturity.

This guide compares npm and Yarn side by side on popularity, installation, dependency management, performance, security, updating, CLI ergonomics, and lifecycle scripts, then looks at where pnpm and Bun fit in.

What is npm?

npm (short for Node Package Manager), initially released in 2010, is a tremendously popular package manager among JavaScript developers. It is the default package that is automatically installed whenever you install Node.js on your system.

It consists of three components: the website to manage various aspects of your npm experience, Command Line Interface (CLI) to interact with npm via the terminal, and registry to access an extensive public database of JavaScript software. 

What is Yarn?

Yarn, initially released by Facebook in 2016, is another popular package manager for the JavaScript programming language. The intention behind creating Yarn was to address some of the performance and security shortcomings of working with npm (at that time).

Since then, npm has undergone several improvements to fix some of its inefficiencies. As a result, as we’ll demonstrate in this blog post, npm and Yarn are now in a neck-to-neck race over which package manager trumps the other.

Yarn's second major version had a rocky launch in 2020, but the project has matured well past that. The modern line, often called Yarn Berry, is now at version 4. It installs through Corepack, resolves dependencies with Plug'n'Play instead of a node_modules folder by default, and adds features like workspaces, constraints, and offline caching that make it a serious option for large codebases. The rest of this article compares modern npm with modern Yarn unless stated otherwise.

Let’s now compare Yarn vs. npm similarities and differences.

Comparing Yarn vs. npm similarities and differences

1. Popularity

npm remains the most widely used package manager by a wide margin, largely because it is the default installed with Node.js. Yarn holds a strong second position among established alternatives, with pnpm growing fastest in monorepo-heavy teams. Popularity matters for practical reasons: more users means more documented answers, better CI support, and faster bug discovery.

For npm:

For Yarn:

2. Installation

Installing npm seems much easier than that of Yarn—npm comes already bundled with your Node.js installation, so there’ll be no need to install it.

Yarn is available as an npm package. So, you can simply install it by running the following command on the terminal:

npm install yarn

You can also opt for other options to install Yarn.

3. Managing dependencies

However, the Yarn core team does not recommend installing it via npm. Depending on your system requirements, you can go for any of these installation options.

Yarn and npm have more or less similar ways of managing dependencies. They both provide the package.json file that exists at the root of the project’s working directory. This file keeps all the relevant metadata associated with the project. It assists in managing the project’s dependencies version, scripts, and more.

Both the package managers store dependency files into the node_modules folder. However, in Yarn 2, the folder will no longer be supported, by default.

Furthermore, both Yarn and npm provide an autogenerated lock file that has the entries of the exact versions of the dependencies used in the project. 

In Yarn, it is called yarn.lock while in npm, it is called package-lock.json. As the name implies, this file locks the dependencies to their stipulated versions during the installation process, after establishing the versioning parameters in the package.json file. 

When installing a dependency, the lock file ensures the same file structure in node_modules is maintained across all environments. This provides determinism, supports collaboration with other developers, and prevents code breakages from installing new or incompatible dependencies.

Whereas Yarn included the lock file feature in its first version, npm tried to overcome this shortcoming and introduced it later in version 5 (May 2017). 

Lockfiles are the foundation of reproducible builds, and a disciplined approach to dependency management protects your code well beyond install time.

While Yarn and npm follow a similar style of managing dependencies, it’s advised not to use them together, unless they are pointed at different registries from their default installations. If used together, they can create conflicts, particularly due to resolution inconsistencies arising from unsynchronized lock files.

Nonetheless, Yarn recently announced a new feature that increases the awareness between the two package managers and allows developers to transition from npm to Yarn smoothly.

This feature allows developers to import and install dependencies from the npm’s package-lock.json file. It is a useful improvement, especially for those in mixed yarn/npm environments or intending to migrate their existing projects to Yarn. 

To use this feature, just run the yarn import command in a repository having the package-lock.json file. As a result, Yarn will apply the resolution parameters in the package-lock.json file to generate a corresponding yarn.lock file.

Similarly, npm is also working to enable developers to play nicer with Yarn. In the upcoming v7, npm will make updates to the package-lock.json file to allow the handling of yarn.lock files. This will reduce the friction often experienced when switching between npm and Yarn (or using both).

4. Performance

Performance was the original reason Yarn existed, and it is no longer the deciding factor between these two. npm has closed most of the gap since version 7, and both tools now install packages in parallel and cache aggressively. Yarn 4 with Plug'n'Play and hardlinked caches still tends to win on repeat installs and monorepo workflows, while independent 2026 benchmarks generally place pnpm and Bun ahead of both on cold installs.

If install speed is your top priority, benchmark against your own lockfile rather than trusting generic numbers: dependency graphs vary enough that results differ per project.

5. Security

Both package managers now treat security as a first-class feature, which matters given the steady rise of malicious packages on npm.

• npm: built-in npm audit, provenance attestations that cryptographically link a package to its source repo and build, and trusted publishing via OIDC in npm 11 that removes long-lived publish tokens.
• Yarn: checksum verification of every package, hardened mode for pull request workflows, and offline mirrors that reduce exposure to registry-level attacks.

Neither tool will catch every threat on its own. Registry-level supply chain attacks, typosquatting, and compromised maintainer accounts affect both ecosystems equally, so pair whichever manager you choose with software composition analysis and automated dependency updates.

6. Updating 

Performing an upgrade to the latest package version available is similar in both tools, albeit with some CLI command differences.

Here is how to update Yarn dependencies

yarn upgrade
yarn upgrade [package-name]

Here is how to update npm dependencies

npm update
npm update [package-name]

In both tools, if you do not indicate a package name, all the project’s dependencies will be updated to their latest version. This will be based on the version ranges defined in the package.json file. Also, the package-lock.json file or the yarn.lock file will be modified, based on the tool you’re using.

On the other hand, if you indicate a package name, only the specified package will be updated.

7. CLI commands

Developers usually spend a lot of time interfacing with terminals; it’s where they live. Therefore, another vital point for comparison is the CLI. 

Let’s look at some commands common to both tools:

Let’s look at some commands different in both tools:

Let’s look at some commands present in one tool but absent in another:

In terms of the output of running the CLI commands, Yarn delivers a cleaner output (that also comes with emojis, unless you’re on Windows). 

For example, here is a screenshot of running a simple install command using both tools:

For Yarn:

For npm:

As you can see above, npm generates a lot of noise, by default. On the contrary, Yarn’s output is cleaner and less verbose. 

8. Lifecycle scripts

Both npm and Yarn support lifecycle scripts. These are entries in the scripts property of the package.json file that let you define various commands you can use to automate tasks related to your package. Lifecycle scripts greatly ease the lives of developers, especially in automating repetitive tasks.

Here is an example:

{
  "name": "mypackage",
  "scripts": {
    "myexample": "echo 'hello world'"
  }
}

To execute it using npm, run the following

npm run myexample

To execute it using Yarn, run the following:

yarn run myexample

The difference seems to lie in how npm and Yarn support pre and post hooks. These are commands that run before or after a script lifecycle event.

Here is an example:

"scripts": {
   "prebuild": "one",
   "build": "two",
   "postbuild": "three",
   "test": "jest"
}

In the above code, the commands prefixed with pre and post will be executed in their respective order.

In npm, you can use pre and post commands for a number of built-in and arbitrary scripts specified in the scripts field of the package.json file. Yarn 1 also lets you use the commands to define scripts. 

However, Yarn 2 does not support each lifecycle script initially present in npm. That intentional decision is based on realizing that including several lifecycle scripts in a project often leads to avoidable confusion and errors. 

Furthermore, Yarn 2 does not support arbitrary pre and post commands for user-specified scripts. For example, it does not support using prestart. The Yarn 2 team has observed that the behavior, which was inherited from npm, resulted in scripts running implicitly, instead of explicitly. As a result, it muddles the normal execution flow and ignites surprising executions, such as yarn serve also being executed as yarn preserve. 

What about pnpm and Bun?

The npm vs Yarn question is no longer a two-horse race.

• pnpm stores every package once in a global content-addressable store and hard-links it into projects, which makes it the fastest mainstream option for cold installs and the most disk-efficient by a wide margin. After a 2025 supply chain attack spread through install scripts, pnpm 10 also began blocking lifecycle scripts by default, a notable security posture.
• Bun bundles a JavaScript runtime, bundler, test runner, and package installer into one binary and posts the fastest raw install times of any tool. It is maturing quickly but its ecosystem compatibility still trails npm and Yarn for complex enterprise setups.

If you are starting fresh in 2026, evaluate all four. If you are already on npm or Yarn, neither is a bad place to be, and switching costs usually outweigh the gains unless install time is a real bottleneck.

npm vs Yarn FAQs

Conclusion

Both npm and Yarn are mature, fast, and safe choices in 2026. npm wins on ubiquity and zero-setup convenience. Yarn 4 wins on monorepo tooling and strict, deterministic installs. pnpm and Bun are worth a look if install performance is a genuine bottleneck.

Whichever package manager you choose, it only installs what you tell it to install. Keeping those dependencies current and free of known vulnerabilities is the harder problem. Teams that automate dependency updates patch vulnerable packages dramatically faster. Mend Renovate automates dependency updates across npm, Yarn, and pnpm lockfiles, and the Mend AppSec Platform adds software composition analysis to catch vulnerable and malicious packages before they ship.