npm vs. Yarn vs. pnpm
Three package managers for the same npm registry, with different install strategies.
Tooling
npm, Yarn, and pnpm all install packages from the same npm registry and read the same package.json — the differences are in install speed, disk usage, and how strictly they enforce dependency resolution. This is a lower-stakes decision than a framework choice since switching later is usually mechanical (delete the lockfile, reinstall).
npm
Best for
- Default choice with zero extra setup — ships with Node.js
- Teams that don't have a strong reason to add another tool
Trade-offs
- Historically slower installs and more disk usage than the alternatives, though recent versions have improved
Yarn
Best for
- Teams wanting Yarn's workspaces support for monorepos (mature, widely used)
- Teams already invested in Yarn's ecosystem and config
Trade-offs
- Yarn 1 (Classic) vs. Yarn Berry (2+) are meaningfully different — check which one a project actually uses
pnpm
Best for
- Teams wanting the fastest installs and lowest disk usage via its content-addressable store
- Monorepos with many shared dependencies across packages
Trade-offs
- Its strict node_modules structure occasionally surfaces packages that incorrectly relied on npm/Yarn's more permissive hoisting
| Dimension | npm | Yarn | pnpm |
|---|---|---|---|
| Install speed | Improved in recent versions | Fast | Fastest (shared store) |
| Disk usage | Higher (duplicated packages) | Moderate | Lowest (content-addressable store) |
| Monorepo support | Workspaces (basic) | Workspaces (mature) | Workspaces (mature, disk-efficient) |
Verdict
This is one of the lower-stakes tooling decisions you'll make. pnpm is a strong default for new monorepo-heavy projects; npm remains a perfectly reasonable choice when you don't want to add another tool to the stack.