I use Mullvad VPN. Very good and secure. You also don't have a regular account with them using your email address only an account number so make sure to note it down somewhere. You can have a monthly subscription or just pay a month when you need the VPN connection.
No logs saved for them, they're open-source and also their VPN app undergo an external security audit.
You can use their app but if you want to use your software, they provide OpenVPN and WireGuard configuration files.