VPN Kill Switch Comparison 2026
A kill switch stops your real IP leaking if the VPN drops. We compare kill switch support across all major VPNs and explain how to enable it correctly.
What Is a Kill Switch?
A VPN kill switch is a failsafe. If your encrypted VPN connection drops - even for a second - the kill switch immediately blocks all internet traffic so nothing escapes over your normal, unprotected connection. Once the VPN reconnects, traffic resumes automatically. It's the difference between a momentary hiccup and silently broadcasting your real IP address.
Why You Need One
VPN connections drop more often than people expect: switching between Wi-Fi and cellular, waking a laptop from sleep, a server restarting, or a brief network glitch. In each case, without a kill switch, your device happily reconnects over your ISP and exposes your IP and activity. For anyone who torrents, works with sensitive data, or lives under surveillance, that momentary leak can matter.
Kill Switch by Provider
| Provider | Kill Switch | Split Tunneling | DNS Leak Protection | Privacy Score |
|---|---|---|---|---|
| Mullvad | Yes | Yes | Yes | 9.7/10 |
| ProtonVPN | Yes | Yes | Yes | 9.6/10 |
| NordVPN | Yes | Yes | Yes | 9.5/10 |
| IVPN | Yes | Yes | Yes | 9.4/10 |
| ExpressVPN | Yes | Yes | Yes | 9.4/10 |
| Surfshark | Yes | Yes | Yes | 8.7/10 |
| CyberGhost | Yes | Yes | Yes | 8.6/10 |
| Private Internet Access | Yes | Yes | Yes | 8.5/10 |
| Windscribe | Yes | Yes | Yes | 8.3/10 |
| hide.me | Yes | Yes | Yes | 8.2/10 |
| VyprVPN | Yes | Yes | Yes | 8.1/10 |
| PrivadoVPN | Yes | Yes | Yes | 8/10 |
| Mozilla VPN | Yes | Yes | Yes | 8/10 |
| TunnelBear | Yes | Yes | Yes | 7.9/10 |
| PureVPN | Yes | Yes | Yes | 7.8/10 |
| IPVanish | Yes | Yes | Yes | 7.6/10 |
| ZoogVPN | Yes | Yes | Yes | 7.5/10 |
| FastestVPN | Yes | Yes | Yes | 7.4/10 |
| StrongVPN | Yes | Yes | Yes | 7.2/10 |
| Hotspot Shield | Yes | Yes | Yes | 6.8/10 |
Every provider we recommend ships a kill switch. The practical differences come down to platform coverage and defaults. NordVPN, ExpressVPN, and ProtonVPN offer robust system-level kill switches across desktop and mobile. Note that CyberGhost's split tunneling is Android-only, and macOS implementations sometimes have limitations - always test your specific setup.
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Types of Kill Switch
- System-level (recommended): blocks all internet traffic if the VPN drops - the safest default
- App-level: closes only specific chosen apps (e.g. your torrent client) while leaving the rest of your connection active
- Always-on / auto-connect: pairs with a kill switch to reconnect the VPN automatically and keep the block in place until it succeeds
How to Enable It
- Open your VPN app's Settings or Preferences
- Look under a Security, Connection, or Advanced section
- Toggle on the Kill Switch (sometimes called "Network Lock" or "Internet Kill Switch")
- Choose system-level protection unless you specifically need app-level
- Enable auto-connect so the VPN starts with your device
- Test it: connect, then manually disconnect the VPN and confirm your internet is blocked
ExpressVPN calls its version "Network Lock" and NordVPN offers both app-level and system-level options. Whatever the name, the rule is the same: turn it on, and verify it works.