Official communication

Every word is a target.
Sealed by design.

ArcaGate is an end-to-end encrypted messenger for official and institutional communication. Encryption strength comes first: only the sender and the recipient can read the content.

01 · Encrypt

End-to-end encryptiononly sender and recipient can read

Signal protocol
Sealed sender
X25519 + ML-KEM

The problem

Sensitive official exchanges often run on consumer apps and on infrastructure the organization does not control. Messages are backed up, kept for years and left readable on screen.

The approach

Signal-protocol encryption with hybrid post-quantum protection, hosting under the customer's control, strict data minimization and hardened phones, in a closed circle of verified users.

Key capabilities

Built to leave nothing behind.

End-to-end encryption

Signal protocol. Sealed sender hides who writes to whom, even from the server.

Post-quantum protection

Hybrid X25519 + ML-KEM key exchange against “harvest now, decrypt later”.

48-hour server limit

Deleted on delivery, after 48 h at most if undelivered. No message backups.

Disappearing messages

A sender-defined timer removes messages from the device.

Blurred-message mode Optional

Only the line under the finger is revealed.

Multi-face detection Optional

A second face or a phone aimed at the screen blurs messages instantly.

Voice and biometrics

Encrypted 1:1 voice calls. Biometric unlock.

Closed user circle

Invitation only. No public sign-up.

What it does.

Architecture under your control

Your infrastructure. Your route.

Hosting · three options

AState data centerDedicated infrastructure
BCompany serverOn-premises, own hardware
CCloudSees only sealed envelopes, cannot see traffic

Network · two variants

Via TorRouted over Tor, hides users' IP addresses
DirectTLS 1.3 with hybrid post-quantum keys; faster, simpler

Identical content encryption in every option. No long-term data storage.

Hardened platform

Google Pixel phones with GrapheneOS.

Verified boot
Key attestation
Hardened memory allocator
Duress PIN
Auto-reboot

Not only an app

Two ways to get ArcaGate.

Install the app yourself

Install ArcaGate on your own Google Pixel running GrapheneOS.

Dedicated device from TechElement

A Pixel phone already hardened with GrapheneOS and fully set up with ArcaGate. Delivered ready to use, no setup needed.

Seal your next conversation.

Tell us about your organization and how you communicate today.

Every word is a target.Sealed by design.