Holdfast

Holdfast is a lean password vault server that popular client apps and browser extensions connect to directly — your credentials sync across devices without ever touching a vendor cloud.

Worth knowing before you commit:

• Runs in a fraction of the resources of the official server it mirrors.
• Organizations support family and team credential sharing.
• Back up the data directory religiously; it is the crown jewels.

Self-hosting this one changes your risk model more than any other single app.