https://techcrunch.com/2023/11/23/proton-drive-mac-encrypted/

Swiss privacy-focused company Proton has launched its end-to-end encrypted (E2EE) cloud storage service for Mac users, four months after it landed on Windows.

Founded some nine years ago, Proton was originally focused on its flagship Gmail alternative called Proton Mail, but the company has expanded its horizons into VPNs, a password manager, calendar and, indeed, cloud storage.