Mullvad has been open-source for a long time now[1], and unlike ProtonVPN it doesn't ask for an email address or any other personally identifiable information.

Mullvad has been open-source for a long time now[1], and unlike ProtonVPN it doesn't ask for an email address or any other personally identifiable information. [1] https://github.com/mullvad/mullvadvpn-app https://github.com/mullvad/mullvadvpn-app