I started using ProtonVPN in the last few weeks. If you run Little Snitch, you can see they're sending data to Google Crashlytics. Doesn't inspire confidence. https://www.dropbox.com/s/t5ciujv55g7l2dj/ProtonVPN-Google-C...
[0] https://www.reddit.com/r/ProtonVPN/comments/a0qiuu/protonvpn...
Nord was pretty good but I got rid of them when they removed the ability to see the distances to the servers in their app.