I just use a wireguard config with Proton. But I imagine Proton writes their own client because many people can't handle their own config.
Also some "VPN"s are just fronts for zionist terrorism (eg. cyberghost, expressvpn, etc.), etc.
- https://www.mintpressnews.com/exposed-how-israeli-spies-control-your-vpn/288259/
- https://medium.com/illumination/vpns-the-privacy-trap-4aef67f39634
Do you trust mossad with your VPN?