Best Encrypted Cloud Storage Provider?

I’m looking to move away from google docs/photos/drive (for obvious reasons) and get a more secure cloud storage solution for PC and mobile device backups, as well as storing larger files to free up some storage space. Ideally I’d like windows, linux and android capability.

Can someone give me some recommendations? I’ve seen Tresorit and SpiderOak. But not too sure what else is out there.

Found here