Currently I can't recommend any online backup service.
Or they're not encrypted
Or they rely on US-based servers
Or their client is clumsy
Or their clients don't have energy-saving features such as halting backup when using battery power.
Or they fail unexpectedly and become a nightmare to debug for the originating company (SpiderOak, I'm looking at you)
Sad but true, the only online backup service I'd trust is a minimal NAS like the MyCloud, installed somewhere else like a friend's home, or the office.