@adamhurwitz.eth
Mullvad and WireGuard are the only VPNs that GrapheneOS recommends.
I will compare Mullvad to Proton VPN since I have to frequently toggle Proton VPN on|off on desktop for sites I use on a daily basis. I'm also excited to test @gnosischain's Hopr's distributed product once it's more consumer ready.
https://grapheneos.org/faq#vpn-support:~:text=The%20only%20apps%20we%20can%20recommend%20is%20the%20official%20WireGuard%20app%20and%20the%20official%20Mullvad%20app.