VPN Protocols Compared: WireGuard vs OpenVPN vs IKEv2

WireGuard

WireGuard is the newest and fastest VPN protocol, built with only 4,000 lines of code (compared to OpenVPN's 70,000+). This minimal codebase makes it easier to audit for security vulnerabilities. WireGuard uses state-of-the-art cryptography including ChaCha20 for encryption and Curve25519 for key exchange. It achieves significantly faster speeds than OpenVPN, especially on mobile devices and high-latency connections.

OpenVPN

OpenVPN has been the gold standard for over 15 years. It offers two modes: UDP (faster, recommended for streaming) and TCP (more reliable, better for bypassing firewalls). OpenVPN can run on any port, making it highly effective at bypassing VPN blocks. The open-source code has been extensively audited and trusted by privacy advocates worldwide.

IKEv2/IPSec

IKEv2 is particularly strong on mobile devices because of its MOBIKE feature, which allows seamless switching between Wi-Fi and cellular data without dropping the VPN connection. It's also very fast and secure. IKEv2 is natively supported by iOS, macOS, and Windows, meaning no third-party app is required.

Which Protocol Should You Choose?

• For speed: WireGuard or IKEv2
• For maximum security: OpenVPN (UDP) or WireGuard
• For mobile devices: IKEv2 or WireGuard
• For bypassing censorship: OpenVPN (TCP) on port 443
• For streaming: WireGuard (fastest speeds)