Suggest an editImprove this articleRefine the answer for “How does pnpm differ from npm and Yarn?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)The main difference between **pnpm** and **npm** or **Yarn** is **how it stores dependencies** and manages `node_modules`. pnpm solves the fundamental problem of package duplication, which npm and Yarn do not solve at the architectural level. **Key point:** pnpm keeps one copy of a package in a global cache and creates hard links in `node_modules`, instead of copying every dependency into every project.Shown above the full answer for quick recall.Answer (EN)ImageThe main difference between **pnpm** and **npm** or **Yarn** is **how it stores dependencies** and manages `node_modules`. pnpm solves the fundamental problem of package duplication, which npm and Yarn do not solve at the architectural level. --- ### **1. Dependency storage** | Manager | How it stores packages | |---|---| | **npm / Yarn** | copy every dependency into the project's `node_modules` | | **pnpm** | keeps one copy in a global cache and makes **hard links** in `node_modules` | **pnpm's advantage:** saves dozens of gigabytes of disk space and installs faster. --- ### **2. node_modules structure** | Manager | Trait | |---|---| | npm / Yarn | flat structure, packages can "see" dependencies they shouldn't | | pnpm | strict structure, where a package only gets the dependencies explicitly listed | **pnpm's advantage:** no hidden dependencies and more correct module isolation. --- ### **3. Speed** - npm and Yarn have gotten faster over time, but **pnpm is usually faster**, because it: - downloads almost nothing again (uses the cache) - creates links instead of copies - performs fewer disk write operations --- ### **4. Disk savings** - npm/Yarn duplicate the same dependency versions in every project - pnpm keeps **one version for all projects** --- ### **5. Monorepo support** | Manager | Monorepo | |---|---| | npm | not out of the box | | Yarn | has Workspaces | | pnpm | Workspaces are built in and very effective | --- ### **Summary** **pnpm differs from npm and Yarn in that it:** - does not copy packages, it uses hard links - creates a strict `node_modules` structure - is faster and saves space - suits large projects and monorepos better Functionally, all three managers solve the same problem, but pnpm does it **most efficiently and with the more correct architecture**.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.