the reference implementation is a linux kernel module: https://git.zx2c4.com/WireGuard/ https://git.zx2c4.com/WireGuard/ there are currently at least two activ

the reference implementation is a linux kernel module: https://git.zx2c4.com/WireGuard/ https://git.zx2c4.com/WireGuard/ there are currently at least two actively developped open source userspace implementations in different languages. Two examples are Go and Rust: https://git.zx2c4.com/wireguard-go/ https://git.zx2c4.com/wireguard-go/ https://git.zx2c4.com/wireguard-rs/ https://git.zx2c4.com/wireguard-rs/