Do you think Cryptomator is safe even with ready-to-use cloud services like Dropbox? I admittedly don't understand enough about this to know the risks, which is why I've always avoided uploading my private data.
Another risk I see is that today's encryption will be easily broken in the future. What if they're storing everything to decrypt it later? Granted, this is a bit paranoid but not impossible. You'd have to have really complicated and long passwords to protect against that.
I am very glad to hear. I have been very pleased since I switched from Dropbox to this set-up. I also use Nextcloud without the Cryptomator-directory for more ordinary file-sharing between devices.
Another risk I see is that today's encryption will be easily broken in the future. What if they're storing everything to decrypt it later? Granted, this is a bit paranoid but not impossible. You'd have to have really complicated and long passwords to protect against that.