You are mixing companies and protocols together, mullvad is a vpn company, wireguard/openvpn are protocols used for encrypted tunneling aka vpn 

I check the internet I discovered that mullvad VPN is founded before WireGuard VPN and how it also uses WireGuard and OpenVPN Protocol. 

ladyluck

Mullvad VPN uses [WireGuard VPN](https://www.wireguard.com/) under the hood.

I have both. Mullvad to hide/change my IP if I need to and WireGuard to use a VPN for it's original purpose: to connect all my devices together and host some internal services like password managers.

security

How to Build Your Own Wireguard VPN in Five Minutes (2022)

Roll

I see a lot of people using Wireguard VPN, is it better than Mullavad VPN?