Verdaccio
A lightweight Node.js private proxy registry
... such as Amazon's S3, Google Cloud Storage or create your own plugin. If you want to use all benefits of npm package system in your company without sending all the code to the public, and use your private packages just as easy as public ones. If you use multiple registries in your organization and need to fetch packages from multiple sources in one single project, you can chain multiple registries and fetch from one single endpoint.