I'm quite a sceptical person and I've never been a fan of any big corp, but Google has been the one that I've trusted my data in the most and that I've been happiest with.
I still trust them with some of my data, but I'm rapidly losing faith in them and in fact I'm starting to think that Microsoft are a more "open" company... and I'd consider myself a one-time Microsoft hater, but I think they've turned things around.
The only reason I'm still with them for email/calendars is that they're just so very very good. But they're privacy policies for GDrive scare me, so I don't use that.
Frankly though, I'm starting to think that my data and services would be better off with Microsoft now...