pnpm vs bun vs npm: which to choose

Three package managers, one to pick per project. Here is the comparison on the criteria that actually matter.

The decision table

When to choose pnpm

• Serious long-term project where predictability matters more than novelty.
• Monorepo with multiple packages in a single repo (workspaces). pnpm has the best implementation today.
• Limited disk space or multiple projects on the same machine (dev laptop, shared CI). The global store literally saves gigabytes.
• 100% Node compatibility required by certain native dependencies or demanding third-party tools.

When to choose bun

• You are starting a project from scratch with no compatibility constraints from an existing tool.
• You want a single binary for package manager, bundler, test runner, and runtime. Fewer tools in your toolchain, less configuration.
• You care about performance: bun genuinely installs much faster than the other two on public benchmarks, and the runtime generally executes faster than Node.
• You accept a bit of risk: bun is evolving rapidly, and some native packages or highly specific tools may still trip up.

When to keep npm

Not for a new project. But keep it if:

• Existing project that works with npm and where migration brings no measurable gain.
• Very old CI/CD or a constraint that supports nothing else. Rare today.
• Team onboarding where most people know npm and no one has bandwidth to learn something new.

Our recommendation

For a personal project or a team project in 2026:

1. pnpm by default: maturity, monorepos, and disk savings. It is what we use on Blokby and internal tools.
2. bun if you want simplicity: one tool for everything, clearly better performance, at the cost of slightly less universal compatibility.
3. npm only for backwards compatibility: no urgent migration on a working project, but not the default choice for starting fresh.

Further reading

• Official pnpm documentation: pnpm.io
• Official bun documentation: bun.sh
• Official npm documentation: docs.npmjs.com