Hey! I'm one of the founders of Skiff. Your post here is completely technically incorrect (total BS)
1. Cloudflare doesn't intercept traffic. They're a CDN, and ProtonMail has been considering using them as well (see reddit threads).
2. Google Tutanota in the news this week. Pretty big miss on this one.
3. Not sure what you mean by "better track record" too. 

Anyway, please don't share advice unless you know what you're talking about.