Private AI · arcakey.ai · Est. 2026

A promise can be broken.
Our encryption can’t.

ArcaKey is a privately-keyed, quantum-encrypted reasoning environment for regulated professionals, family offices, and principals whose counsel, strategy, and correspondence require mathematical privacy — not policy assurance.

Request AccessRead the Architecture Paper

The vault, and the key.

“Arca” is the Latin for vault — the locked chest the ancients used for the papers that could not be lost. The key is yours. The vault is the last place an adversary looks when a vault is the last place a human would hide something important. ArcaKey is both halves of that pair, rendered as software.

A

A mark, not a logo.

The Arca · Key wordmark is set once in champagne-italic, framed by corner fillets that echo the cut of a signet. It appears on the vault door, the attestation seal, and the statement of fees — and nowhere else.

Zero retention
On demand, per session.
AES-256 + ML-KEM-768
Post-quantum, hybrid.
User-held keys
Your passphrase, your vault.
TEE-isolated inference
Hardware, not policy.
Signed audit log
Exportable. Tamper-evident.

Three tiers. One principle.

Every tier is end-to-end encrypted, post-quantum, and TEE-isolated. The tiers differ only in key custody, memory horizon, and dedication of infrastructure — never in privacy.

 

Professional

Encrypted AI for regulated practice.
$499per month
  • Daily encrypted reasoning
  • 7–90 day retention
  • 7B / 8B reasoning models
  • Ghost Mode toggle
  • Vertical Knowledge Packs
Retain Professional
Most Discreet

Executive

Private AI. Your keys. 70B reasoning.
$1,499per month
  • Indefinite encrypted memory
  • User-held cryptographic keys
  • 70B reasoning models
  • Dedicated TEE
  • Secure Search · proof-of-purge
Start Executive pilot
By Application

Sovereign

Dedicated, single-tenant infrastructure.
from$4,999per month
  • Per-client GCP A3 CC pool
  • Client-controlled key material
  • Encrypted private RAG
  • Concierge implementation
  • Named engagement engineer
Apply for Sovereign
Teams & Enterprise →

The vault, rendered.

A preview of how the Arca · Key vault reads in use — ink, ivory, and a single restraint of champagne. The aesthetic of a private bank, in digital form.

The Vault
ExecutiveML-KEM-768Session Encrypted
Draft a memorandum to the trust's co-counsel outlining the reporting implications of the structure we discussed last Tuesday.
Understood. Drafting now. The memorandum will reference the restructuring plan already in this vault's memory and flag the three jurisdictional exposures we identified. One moment.
Return to send

For the conversations that cannot live on anyone else's server.

Request a Sovereign call, or start an Executive pilot today. Thirty days at a contracted rate, then the standard fee — or cancellation.

Request AccessSecurity overview