Private by design. Secure by default.

Culltron Secure is the VPN-aware edition of the workspace — Sentinel, Culltron Browser and Bridge hardened together, built on open-source security and VPN components you control. Connection awareness, local-first controls, and honest, transparent setup.

Secure connection Protected

You

Tunnel

Web

TunnelActive

DNS routingThrough tunnel

Open network ports0

The secure stack

Three products, hardened together.

Culltron Secure brings the security tools into one VPN-aware workspace — each free in the OS, stronger together.

Sentinel

Runtime security control center — permissions, signed leases and a full activity log.

Open Sentinel →

Culltron Browser

Privacy-aware, sandboxed browser with per-site permissions, native to the workspace.

See the browser →

Bridge

Scoped, loopback-only connector for runtimes, services and AI — and your VPN.

See Bridge →

VPN-aware workspace

Supports open-source VPN components; the workspace knows your connection state and routes accordingly.

Connection awareness

Always know whether you’re protected, what’s routed through the tunnel, and what isn’t.

User-controlled setup

You choose providers and connections. No silent routing, no forced backhaul through us.

Local-first controls

Permissions, leases and routing are governed on your machine by Sentinel — not a remote console.

Loopback-only runtimes

Nothing binds to the open network. Scoped access and signed leases everywhere.

Open-source honesty

Built on open-source security and VPN technology, with public attributions and upstream fixes.

Aria in Secure · Ultra X26

Security, explained as you go.

In the Secure edition and Ultra X26 apps, Aria explains connection states, permission requests and automations in plain language — so you always understand what's happening and why.

Meet Aria →

Aria

"Your VPN tunnel is active and DNS is routed through it. Culltron Browser requested camera access on one site — I held it for your approval. No runtime is reachable from the open network."

Built on open-source security & VPN components.

Culltron Secure uses and supports proven open-source VPN and security technology. You stay in control of setup and connections, and we publish full attributions in our open-source notices.

Open-source notices

Work privately

The whole workspace, secured.

Culltron Secure brings Sentinel, Browser and Bridge into one VPN-aware, local-first workspace. Open-source, transparent, and yours to control.

Get Culltron Secure Explore OS Secure