How your tunnel is built
Why Aultra VPN runs on WireGuard®.
What Aultra VPN uses
WireGuard®
A modern protocol with a deliberately small codebase and state-of-the-art cryptography. It connects almost instantly, handles switching between Wi‑Fi and mobile data gracefully, and is easy on your battery.
- Quick connects and low overhead
- Battery-friendly on phones
- Works with Aultra Shield
The older standard
OpenVPN
The long-standing industry workhorse, trusted for over two decades and still common in business VPNs. It is flexible and well proven, but its larger codebase and heavier handshakes make it slower to connect on phones.
- Proven over many years
- Can run over UDP or TCP
- Larger, more complex codebase
| Property | WireGuard® | OpenVPN |
|---|---|---|
| Used by Aultra VPN | Yes, on every connection | No |
| Encryption | ChaCha20-Poly1305 | AES-256-GCM (typical) |
| Key exchange | Curve25519, Noise protocol framework | TLS 1.2+ with certificates |
| Transport | UDP | UDP or TCP |
| Code size | Around 4,000 lines: small and auditable | Large, mature and battle-tested |
| Reconnecting on mobile | Fast, handles Wi‑Fi ↔ mobile data switches | Slower to re-establish |
Why we chose WireGuard® for your phone
Phones change networks all the time. WireGuard reconnects quickly when you move from Wi‑Fi to mobile data, keeps overhead low so browsing stays fast, and is light on your battery. That makes it a good fit for a VPN you leave switched on all day, including on public Wi‑Fi.
There's nothing to configure. Every Aultra VPN connection uses WireGuard, and features like the kill switch, split tunneling and Aultra Shield work on top of it.
Can't connect on a hotel, airport or campus network? Complete the network's sign-in page first, then tap Connect again. If it still won't connect, open a support ticket in the app and our team will help.
WireGuard® is open source
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