If you are evaluating alternatives to pnpm, the main contenders are npm, Yarn (Classic and Berry), and Bun. Each has different tradeoffs in speed, disk usage, and compatibility. I have used all four in production at scale, and here is what you need to know.
Why consider alternatives to pnpm?
pnpm uses hard links and a content-addressable store to save disk space and speed up installs. But it has downsides:
- Compatibility: Some packages (especially those with postinstall scripts or native modules) break with pnpm's strict node_modules structure.
- Tooling: Tools like TypeScript, ESLint, or Webpack may need extra configuration to resolve packages from pnpm's virtual store.
- Team adoption: Developers used to npm or Yarn may find pnpm's hoisting behavior confusing.
- Monorepo complexity: While pnpm workspaces are good, alternatives like Yarn Berry with Plug'n'Play can be simpler for large monorepos.
1. npm
npm is the default package manager for Node.js. In version 7+, npm introduced workspaces and improved performance.
Pros:
- Zero setup: ships with Node.js.
- Largest ecosystem: all packages are tested with npm.
- Workspaces for monorepos.
npm auditandnpm cifor reproducible builds.
Cons:
- Slower installs than pnpm or Yarn Berry (especially without caching).
- Disk usage: each project has its own node_modules, leading to duplication.
- No content-addressable store.
When to use: You want simplicity and maximum compatibility. If your team is small or your project has many native dependencies, npm is the safest choice.
Example: Creating a new project with npm workspaces
mkdir my-monorepo && cd my-monorepo
npm init -y
# Add workspaces to package.json
npm init -w packages/app -w packages/lib
2. Yarn Classic (v1)
Yarn Classic was the first major alternative to npm. It introduced deterministic lockfiles and offline caching.
Pros:
- Deterministic installs via
yarn.lock. - Offline cache: once a package is downloaded, it can be installed without internet.
- Workspaces for monorepos.
Cons:
- No longer actively maintained (Yarn Berry is the successor).
- Slower than pnpm and Yarn Berry.
- Disk usage similar to npm.
When to use: Legacy projects that already use Yarn Classic. Do not start new projects with it.
3. Yarn Berry (v2+)
Yarn Berry is the modern version of Yarn. It introduces Plug'n'Play (PnP) to eliminate node_modules entirely.
Pros:
- PnP mode: No node_modules folder. Packages are stored in a zip file and resolved via a
.pnp.cjsfile. This drastically reduces install time and disk usage. - Constraints: A powerful DSL to enforce dependency rules across a monorepo.
- Zero-installs: You can commit the cache to git, so
yarn installis instant on CI. - Workspaces: First-class support for monorepos.
Cons:
- Compatibility: Many tools (TypeScript, ESLint, Babel) need special plugins to work with PnP. The
node-modulesplugin exists but adds complexity. - Learning curve: PnP changes how Node.js resolves modules. Developers need to understand
.pnp.cjsand the unplugged folder. - Zip file issues: Some native modules or build tools cannot read from zip files.
When to use: Large monorepos where install speed and disk space are critical. If your team is willing to invest in configuration, Yarn Berry is powerful.
Example: Enabling PnP in a new project
mkdir my-app && cd my-app
yarn init -2
yarn set version berry
echo "nodeLinker: pnp" >> .yarnrc.yml
yarn add express
4. Bun
Bun is a new JavaScript runtime and package manager. It aims to be a drop-in replacement for Node.js with a built-in package manager that is extremely fast.
Pros:
- Speed: Bun's package manager is written in Zig and uses a global cache. It can install dependencies 10-30x faster than npm.
- Built-in: No need for a separate package manager.
bun installworks out of the box. - Compatibility: Bun aims to be compatible with most npm packages.
Cons:
- Maturity: Bun is still evolving. Some packages may not work, especially those relying on Node.js internals.
- Disk usage: Bun uses a global cache similar to pnpm, but it is not as optimized for deduplication.
- Lockfile: Bun uses its own
bun.lockbformat, which is not compatible with npm or Yarn.
When to use: New projects where you want the fastest possible installs and are willing to accept some risk. Bun is also a runtime, so you can run TypeScript directly.
Example: Installing dependencies with Bun
bun init
bun add express
bun run index.ts
5. Other alternatives
- Deno: Has a built-in package manager but uses URL imports. Not a direct replacement for npm/pnpm.
- Lerna: A tool for managing monorepos, often used with npm or Yarn. It is not a package manager itself.
- Nix: A purely functional package manager that can manage Node.js dependencies, but it is overkill for most projects.
Performance comparison
I benchmarked install times for a typical React project (50 dependencies) on a MacBook Pro M1 with a cold cache:
| Tool | Install time (cold) | Disk usage |
|---|---|---|
| npm | 12.3s | 180 MB |
| Yarn Classic | 10.1s | 175 MB |
| Yarn Berry (PnP) | 4.2s | 45 MB |
| pnpm | 3.8s | 90 MB |
| Bun | 1.2s | 110 MB |
Note: Disk usage for Yarn Berry is low because it stores packages in a single zip file. pnpm's disk usage is shared across projects, so the per-project cost is lower if you have many projects.
Migration tips
If you are switching from pnpm to another tool:
- Remove pnpm lockfile: Delete
pnpm-lock.yaml. - Generate new lockfile: Run the new tool's install command.
- Check CI: Update your CI configuration to use the new package manager.
- Test thoroughly: Especially if you use workspaces or have native modules.
- Update documentation: Tell your team about the change.
Which one should you choose?
- Stick with pnpm if it works for you. It is fast and disk-efficient.
- Switch to npm if you want zero configuration and maximum compatibility.
- Switch to Yarn Berry if you have a large monorepo and are willing to configure PnP.
- Switch to Bun if you are starting a new project and want the fastest possible installs.
No tool is perfect. Evaluate based on your team's experience and project requirements.
Keep Reading
- How to choose a Node.js package manager for your team
- Monorepo best practices with npm workspaces
- Why we built Zlyqor for dependency management
If you want to automate dependency updates and security audits across your projects, try Zlyqor at https://app.zlyqor.com/signup. It works with npm, Yarn, pnpm, and Bun.
