NGRAVE Zero 2026 — premium air-gapped cold wallet

NGRAVE Zero — the maximum-security hardware wallet

NGRAVE NV is a Belgian hardware-wallet company founded in 2018 with a deliberate "no compromises" security thesis. The Zero is the only retail hardware wallet to carry a Common Criteria EAL7 certification on its secure element — the highest grade defined in the CC framework, used in defence and government applications. Combined with 100% air-gapped operation (no USB / Bluetooth / Wi-Fi / NFC signing) and an on-device biometric fingerprint sensor for setup, the Zero represents the security ceiling for retail hardware wallets in 2026.

Activation flow

Order from ngrave.io (limited availability via authorised resellers; the company prefers direct fulfillment for supply-chain assurance). Power on the Zero — the device uses the on-board fingerprint sensor, ambient-light measurement and the user's interactive entropy contributions to generate the seed inside the EAL7 secure element. The seed is engraved by the user onto the included Graphene stainless-steel backup plate (or written on paper as a fallback). Install the NGRAVE Liquid companion app on iOS / Android, pair via QR-code exchange, and the wallet is ready. To sign a transaction, the companion app generates a QR; the Zero scans it, displays the human-readable transaction details, lets you confirm physically; the signature returns as QR.

Why EAL7 matters

Common Criteria security certifications run from EAL1 (lowest) to EAL7 (highest). Most consumer hardware-wallet secure elements are EAL5+ or EAL6+, which is already strong. EAL7 is a quantum leap above that — it requires formal mathematical verification of the secure element's security properties, the kind of certification process used for defence-grade smart cards. In practice, EAL7 means the secure element has been mathematically proven to resist a wider range of side-channel and fault-injection attacks than lower-grade chips. For retail users this is overkill on a $500 holding; for users holding $500,000+ in cold storage it is the meaningful upgrade over a Ledger or Trezor.

Graphene stainless-steel seed backup

NGRAVE ships the Zero with the Graphene seed-backup plate — a two-piece stainless-steel system where you punch your seed words into a metal plate using an included tool. The plate is engineered to survive house fires (up to 1,400°C), submersion in water for indefinite periods, and decades of corrosion. This addresses the most common cause of retail cold-storage loss: paper-seed backups that get destroyed in floods or fires, or fade over years of storage. The Graphene plate is the most thoroughly engineered seed-backup system in the retail market.

Pros and cons

NGRAVE Zero vs Ledger Stax vs Keystone

Editor's personal take

The NGRAVE Zero is the hardware wallet I recommend to clients with portfolios above the $100,000 threshold. The EAL7 certification, the air-gap, the Graphene seed-backup plate and the Belgian supply chain together produce the highest security-and-survivability profile in the retail market. For smaller portfolios it is materially over-spec'd — a Ledger Nano S Plus or a Tangem set delivers 95% of the real-world security at a fraction of the price. The Zero is the right buy when "this device protects life savings" is the framing.

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