Key takeaways
- WireGuard for everyday speed, IKEv2 for phones that hop networks, OpenVPN when compatibility matters.
- Stealth protocols (VLESS Reality, Hysteria2) are the ones most guides skip: to the network their traffic looks like ordinary HTTPS, so they connect where the others are blocked.
- Don’t hunt for one winner. Pick a provider that ships the full suite on every tier and lets you switch freely.
A VPN protocol is the rulebook for how your tunnel is built and encrypted. You don’t need to be an engineer to choose well. You need to know which one to switch to when. Here’s the honest comparison, then the detail.
| Protocol | Speed | Reconnects | Beats firewalls | Best for |
|---|---|---|---|---|
| WireGuard | Fastest | Good | No (on its own) | Everyday use, streaming |
| IKEv2/IPsec | Fast | Excellent | Limited | Mobile / switching networks |
| OpenVPN | Moderate | Good | Sometimes (TCP/443) | Compatibility, older setups |
| VLESS Reality / Hysteria2 | Fast | Good | Yes | Restrictive / censored networks |
WireGuard: the modern default
WireGuard is fast and efficient, with a famously small codebase (a few thousand lines versus the tens of thousands in older stacks), which makes it easier to audit and harder to get wrong. It uses modern cryptography (ChaCha20) and sips battery on mobile. The one catch: its traffic has a recognisable signature, so on a network actively blocking VPNs it can be detected.
Reach for it: the best all-round choice on any open network.
IKEv2/IPsec: the mobile specialist
IKEv2’s standout trait is how gracefully it survives network changes: walk out of Wi‑Fi range onto cellular and it re-establishes the tunnel almost instantly, so the drop is invisible. Fast and stable, but less able than OpenVPN to disguise itself through awkward firewalls.
Reach for it: when you’re mostly on a phone and want seamless reconnects.
OpenVPN: the old reliable
The veteran. OpenVPN has had years of public scrutiny and runs almost everywhere. Its key trick is flexibility: it can run over TCP on port 443, the same port as normal HTTPS, which helps it slip through restrictive networks that block other protocols. The cost is weight: it’s heavier and usually slower than WireGuard.
Reach for it: when you want a long, audited track record, or WireGuard is blocked.
Stealth protocols: the part most guides skip
These are the protocols that matter when nothing else connects. Ordinary VPN traffic carries detectable fingerprints, so deep packet inspection (DPI) systems and national firewalls can spot and drop it. Stealth protocols remove that fingerprint. The two current standouts:
- VLESS Reality borrows the TLS handshake of a real, well-known website, so to the firewall your connection is indistinguishable from ordinary HTTPS on port 443. There is nothing VPN-shaped to block without breaking the normal web.
- Hysteria2 rides QUIC, the transport behind HTTP/3, so it blends in with modern web traffic and stays quick on flaky, lossy networks where other protocols crawl.
Earlier tricks in this family (OpenVPN on port 443, the older Trojan protocol) did the same job less convincingly, and DPI has largely caught up with them. Unlike those, the current generation carries little speed penalty, so on a hostile network it can simply be your default. When WireGuard and OpenVPN will not connect (a censored country, a locked-down school or office network), a stealth option is the difference between working and not.
Reach for it: behind any firewall that blocks regular VPNs. We cover both in depth: VLESS Reality explained and Hysteria2 explained.
You shouldn’t have to pick just one
The best setup isn’t a single “winning” protocol. It’s a provider that ships several and lets you switch freely.
The lineup to look for:
- WireGuard or IKEv2 for daily speed.
- OpenVPN for compatibility.
- A stealth mode (VLESS Reality or Hysteria2) in reserve for hostile networks.
The paywall trap: be wary of providers that lock their best protocol behind a pricier plan. The strongest ones include the full suite on every tier.
See which of today’s providers include stealth protocols as standard, not as an add-on, in our VPN rankings.