WireGuard — #2 Alternative to Cisco AnyConnect / OpenVPN

Name: WireGuard
Rating: 4.92 (1744 reviews)

Modern, cryptographically opinionated kernel-space VPN tunnel in ~4,000 lines of code

Built directly into the Linux kernel using Noise protocol framework, ChaCha20-Poly1305, and Curve25519—delivering line-rate multi-gigabit encrypted throughput.

License: GPL-2.0 / MIT · Pricing: Free & Open Source · Compare all Cisco AnyConnect / OpenVPN alternatives · Official Website