VPN Protocols Explained: Which One Should You Use?

3 June 2026 · Nadia Rahman · 7 min read

OpenVPN, WireGuard, IKEv2, and other VPN protocols compared: what each does well, where they fall short, and how to pick the right one for your needs.

A quick overview of the protocols you will encounter

VPN protocols are the technical rules that govern how your device talks to the VPN server. They affect speed, security, stability, and how easily the connection is detected. Most VPN apps let you choose between several protocols.

The protocols you will most often see are OpenVPN, WireGuard, IKEv2/IPsec, and — less common now — L2TP/IPsec and SSTP. Each has strengths and weaknesses, and the right one depends on what you are doing and where you are doing it.

OpenVPN: the reliable workhorse

OpenVPN has been the standard for over a decade, and for good reason. It is open-source, thoroughly audited, and runs on virtually every platform. It supports strong encryption and can be configured to run on either TCP or UDP.

The main trade-off is speed. OpenVPN is noticeably slower than newer protocols because it processes data in user space rather than the kernel. For most everyday browsing the difference is small, but on high-speed connections you will feel the bottleneck. It also consumes more battery on mobile devices.

WireGuard: fast and modern

WireGuard is rapidly replacing OpenVPN across the industry. It is simpler, faster, and runs in the Linux kernel, which means dramatically better performance — often matching within a few percent of your base connection speed. It uses modern encryption and is much leaner in code size.

WireGuard does have limitations. It is less resilient on networks that aggressively block VPN traffic because its handshake is distinctive and easier to fingerprint than OpenVPN. But for speed and efficiency, WireGuard is the clear winner.

IKEv2/IPsec: mobile and stable

IKEv2 paired with IPsec is particularly strong on mobile devices. It handles network transitions gracefully — switching from Wi-Fi to mobile data without dropping the VPN connection. It is also reasonably fast, though not as fast as WireGuard.

Which one should you use?

For almost all situations, WireGuard is the best default. Use OpenVPN if you need maximum compatibility, are on a network that blocks WireGuard, or prefer a protocol with more configuration options. Use IKEv2 on mobile if you move between networks frequently.

Whichever protocol you choose, the underlying encryption and your provider's logging policy matter far more than the protocol itself.