Cryptomator is another encryption software which can encrypt files before they're uploaded to the cloud, and it's open source.
Re:Apple’s Mistake
by endisneigh on Monday August 09, 2021 @01:24PM
(#28119618)
How do you know Sookasa isn’t doing the same thing? It doesn’t appear to be open source.
A free and open source alternative to Sookasa is Cryptomator.
Open source software like rclone can do something similar.
You can irreversibly transform the image data of photos added to the Photos app as well.
However, unlike with Apple's invasive on-device scanning, you can encrypt files before storing them at Dropbox or Google Drive. There are even simple turnkey solutions like Sookasa:
"Sookasa acts as a transparent layer over Google Drive to encrypt your sensitive files on the cloud and across connected devices..." https://www.sookasa.com/GD
"Sookasa protects data both on devices and in the cloud, and decouples the data from the encryption keys, meaning your data stays secure no matter where it goes." https://www.sookasa.com/dropbox-security/