PrivyDrop

PrivyDrop is a macOS backup utility that encrypts your files locally before sending them to Google Drive. It uses client-side AES-256 encryption so your data is never visible to Google or anyone else. The app runs as a menu bar item on your Mac, making it easy to start backups without opening a full interface. You configure which folders to protect and the encryption key stays on your machine.

Backups are incremental, meaning only changed files get re-uploaded after the initial sync. The tool integrates directly with Google Drive's API, so you don't need to install a separate sync client. It supports exclusion patterns to skip cache or temp directories. PrivyDrop is built in Swift and is macOS-only. The source code is available on GitHub under a standard open source license.

This tool is aimed at macOS users who already rely on Google Drive but want true end-to-end encryption for their backups. It was created by a solo developer named David Bai and is free to use. There are no paid tiers or subscription plans. Because it relies on your own Google Drive storage, your only cost is the storage space you already pay for.