Evidence points to ProtonVPN being a white-labeled version of Nord VPN. Source: https://news.ycombinator.com/item?id=23571653 and https://archive.is/iZ2l2 (archive of relevant but broken [2] link @ HN thread)
Protonmail has its own issues that have been discussed on HN. Source: https://encryp.ch/blog/disturbing-facts-about-protonmail/
Obviously Gmail and such are piped directly into global intelligence databases, but Proton is not a panacea, and no guarantee they aren't compromised themselves.