You can self-host a private PyPI registry with pypiserver and a private npm registry with Verdaccio . Both run on a single box or inside Docker containers. You get three wins that public registries cannot match: faster installs from a LAN cache, a safe home for private packages, and cover against outages, typosquatting, and supply chain attacks. Both tools are free, open-source, and take under 30 minutes to set up.
Why Self-Host a Package Registry
Public registries go down. PyPI had several partial outages across 2024 and 2025. The npm registry has had its own incidents that slowed installs or knocked them out. When either one is down, every CI/CD pipeline and dev box that depends on it stops installing packages. If your deploys lean on pip install or npm install, a registry outage becomes your outage.






