Best OneDrive Alternatives?

I recently read that file syncing services such as OneDrive, ICloud and Dropbox actually have manual access to your files. And i don’t even think its all end to end encryption.

Therefore i am here, asking you all for a possible alternative. I’ve looked into self-hosting but it seems like a lot of hassle.

Any not self-hosted syncing services with privacy in mind? I’ve looked at Sync.com and they look promising, and their policy seems good. But how much can we trust white papers? And i don’t think their open source, which is a huge bummer.

Found here