Wireguard isn’t what matters. What matters is how much personal data the VPN company collects and how they handle that personal data. In Mullvad’s case, they don’t need any personal information to sign up (you just generate an account number and can then pay via cash/monero for anonymity), and they don’t get any personal information when you use the service either as their servers are RAM-only so they can’t log anything.
Wireguard isn’t what matters. What matters is how much personal data the VPN company collects and how they handle that personal data. In Mullvad’s case, they don’t need any personal information to sign up (you just generate an account number and can then pay via cash/monero for anonymity), and they don’t get any personal information when you use the service either as their servers are RAM-only so they can’t log anything.