CactusVPN VPN Protocols Compared

Protocols CactusVPN supports

What sets CactusVPN apart from many modern providers is that it deliberately keeps a wide protocol lineup rather than trimming everything down to just WireGuard. The full list is WireGuard, OpenVPN (both UDP and TCP), IKEv2, SoftEther, SSTP, L2TP/IPSec and PPTP (legacy). These older protocols are not kept out of inertia — each one still does a specific job better than the others, especially connecting to old hardware and getting through networks that filter VPNs aggressively.

• WireGuard — the modern, fastest default
• OpenVPN UDP/TCP — stable and router-friendly
• IKEv2 — fast mobile reconnection
• SoftEther — punches through strict firewalls
• SSTP — native Windows + port 443 bypass
• L2TP/IPSec — compatibility with old routers
• PPTP (legacy) — last-resort compatibility only

WireGuard — fast and modern

For everyday use on CactusVPN, start with WireGuard. It is a ground-up redesign with a small codebase, so it connects quickly, delivers high download speeds and uses less battery than the older protocols. That makes it the right choice for streaming, downloading and low-latency gaming. Because CactusVPN offers unlimited bandwidth, WireGuard is the protocol that extracts the most performance from servers across its 25 countries.

• Fastest with low latency
• Battery-friendly on mobile
• Best default for general use

OpenVPN — stable and compatible

When WireGuard stalls or the network is uncooperative, OpenVPN is CactusVPN's primary fallback. It is battle-tested, extremely stable, and supported on far more router firmware than WireGuard. You get two modes: UDP favours speed for streaming and general browsing, while TCP verifies every packet — a touch slower but much more resilient on flaky connections, and better at making traffic look ordinary when UDP is throttled.

• UDP — fast, good for streaming
• TCP — resilient on flaky networks
• Widest router support

Obfuscation / firewall bypass

This is where CactusVPN's broad lineup truly pays off. On networks that block ordinary VPNs — school Wi-Fi, corporate networks or heavily censored countries — start with SSTP, which travels over port 443 just like HTTPS, so the traffic blends in with normal secure browsing. If that still fails, move up to SoftEther, a genuine CactusVPN strength: it is engineered to disguise traffic and break through strict deep-packet-inspection firewalls better than the standard protocols. Many VPNs do not even offer SoftEther as an option.

• SSTP — port 443, looks like HTTPS traffic
• SoftEther — best at beating strict firewalls

IKEv2 — best on mobile

If you mostly use mobile and frequently switch between Wi-Fi and cellular, IKEv2 is the best fit on CactusVPN. Its standout trait is near-instant reconnection when the signal drops or you change networks, so there is rarely a gap in protection. It suits travellers and anyone who keeps a phone connected to the VPN all day, and its speed is close to WireGuard in many scenarios.

• Reconnects fast when networks switch
• Stable when the signal is unreliable
• Speed close to WireGuard

Which to choose

A real advantage of CactusVPN is that you can change protocol per connection from the settings in the Windows, macOS, Android and iOS apps, with nothing extra to install. A simple rule: use WireGuard by default, then step down by situation. Keep L2TP/IPSec and PPTP as last resorts for old devices that support nothing newer — and because PPTP is weakly encrypted, reserve it for non-sensitive compatibility cases only.

• General/streaming: WireGuard
• Flaky network/router: OpenVPN TCP
• Heavily blocked: SSTP, then SoftEther
• Mobile switching networks: IKEv2
• Old devices only: L2TP/IPSec or PPTP