The absolute most critical feature must be desktop sync like, OneDrive, Google Drive, iCloud, DropBox and just about every other cloud provider supports. I used to use BoxCryptor with OneDrive until BoxCryptor abandoned its customers when it sold out to DropBox and have switched to Proton Drive which is great, but manual download, edit and upload is just such a painful workflow.
The absolute most critical feature must be desktop sync like, OneDrive, Google Drive, iCloud, DropBox and just about every other cloud provider supports. I used to use BoxCryptor with OneDrive until BoxCryptor abandoned its customers when it sold out to DropBox and have switched to Proton Drive which is great, but manual download, edit and upload is just such a painful workflow.