NGRAVE ZERO

NGRAVE ZERO (ngrave.io) is the world's highest security-certified financial product — a fully air-gapped hardware crypto wallet that achieved EAL7 security certification, the highest level of security certification available for any financial product (higher than Ledger's EAL6+ and Trezor's EAL6+, the next two highest hardware-wallet security certifications on the market). NGRAVE ZERO is the only financial product in the world that has achieved EAL7 security certification (per the NGRAVE homepage: "The Most Secure Wallet Ever Built — World's most secure air-gapped wallet with biometrics and EAL7 security, and its recoverable stainless steel backup").

NGRAVE (the company) is based in Belgium (Made in Belgium) and has been operating since 2018 (per the NGRAVE homepage: "Empowering ownership since 2018"). NGRAVE was founded by a team including Xavier & Edouard & Ruben and is known for using "the same certified security architecture used by defense organizations in Europe" (Military-Grade Security per the NGRAVE homepage). NGRAVE's co-founder advisor / contributor Jean-Jacques Quisquater is the 2nd reference on the Bitcoin white paper (the Bitcoin white paper cites Quisquater's 1998 paper on proof-of-work / hashcash), giving NGRAVE a deep-rooted credibility credential within the Bitcoin / crypto security research community.

NGRAVE's product family in 2026 includes three complementary products:

• NGRAVE ZERO — the air-gapped hardware wallet (the product referenced in this directory entry). Fully air-gapped (no USB / no Bluetooth / no Wi-Fi). EAL7 security certified. 4-inch ultra-clear touchscreen. Custom OS. Biometrics (fingerprint sensor).
• NGRAVE GRAPHENE — the world's first encrypted + recoverable stainless-steel seed-phrase backup plate. House-fire resistant. The lower plate is the seed-phrase backup; the upper plate is an additional encrypted layer that, when stacked with the lower plate, reveals the seed phrase. The two plates are stored separately for theft-resistance (an attacker would need both plates to recover the keys).
• NGRAVE LIQUID — the companion mobile app that pairs with NGRAVE ZERO via QR code. Manages the user's portfolio without exposing the keys (keys stay on the ZERO hardware, never on the mobile app). Available on iOS + Android.

NGRAVE's defining comparison vs the major hardware-wallet competitors (visible on the NGRAVE homepage's comparison table, July 2026):

• EAL Level: NGRAVE ZERO = EAL7 (highest); Ledger Flex = EAL6+; Trezor Safe 5 = EAL6+.
• Offline Capability: NGRAVE ZERO = Fully air-gapped (no USB, Bluetooth, or Wi-Fi); Ledger Flex / Trezor Safe 5 = Requires USB / Bluetooth. Not air-gapped.
• Backup Method: NGRAVE ZERO = GRAPHENE steel plate + Perfect Key recovery; Ledger Flex = 24-word seed + optional steel backup; Trezor Safe 5 = 24-word seed, microSD (Safe 5), SLIP39 optional.
• Coin Support: NGRAVE ZERO = 5 blockchains and all ERC-20 + ESDT tokens; Ledger Flex = 5,500+ coins; Trezor Safe 5 = 9,000+ coins and tokens supported.

NGRAVE ZERO is uniquely positioned as the "most secure hardware wallet" — highest EAL7 security certification + fully air-gapped + biometrics + GRAPHENE stainless-steel encrypted backup — but with a trade-off of narrower coin support (5 blockchains + all ERC-20 / ESDT) compared to Ledger (5,500+) and Trezor (9,000+).

Fully air-gapped — no USB / Bluetooth / Wi-Fi (100% offline signing)

The NGRAVE ZERO is fully air-gapped — no USB-C, no Bluetooth, no Wi-Fi, no NFC. Communication with the NGRAVE LIQUID mobile app is via QR code only: the LIQUID app displays a QR code containing the unsigned transaction; the user scans it with the ZERO's built-in camera; the ZERO signs the transaction entirely offline within its secure element; the ZERO displays a QR code containing the signed transaction; the user scans the signed-transaction QR code back into the LIQUID app, which broadcasts to the network. The private keys never leave the NGRAVE ZERO hardware device and the device is never connected to anything outside its own secure-element computational core. This is the maximum air-gap achievable in a consumer hardware wallet — same as SafePal S1, also a QR-code-only air-gapped hardware wallet.

EAL7 security certification — highest available for any financial product

The NGRAVE ZERO is the only financial product in the world that has achieved EAL7 security certification (Common Criteria Evaluation Assurance Level 7), the highest level of security certification available for any financial product. EAL certification levels range from EAL1 (lowest) to EAL7 (highest). EAL7 is higher than:

• EAL6+ — Ledger Flex / Stax / Nano X (and Trezor Safe 5 / 7).
• EAL5+ — Ledger Nano S / S Plus (and the secure-element level commonly cited for consumer hardware wallets).

EAL7 requires formal method-based design + comprehensive structured testing + independently verified vulnerability analysis at the highest rigor. NGRAVE achieved EAL7 by using "the same certified security architecture used by defense organizations in Europe" (Military-Grade Security per the NGRAVE homepage). This is NGRAVE's defining security credential and is the differentiator vs every other consumer hardware-wallet vendor on the market.

Biometrics (fingerprint sensor)

The NGRAVE ZERO has a built-in biometric fingerprint sensor for device unlock + transaction-signing authorization. The fingerprint adds a physical-biometric layer on top of the PIN — even if an attacker has the user's PIN, they can't sign transactions without the user's fingerprint. This is a meaningful differentiator vs Ledger / Trezor / SafePal / Keystone, none of which have biometric fingerprint sensors on their flagship hardware wallets.

4-inch ultra-clear touchscreen

The NGRAVE ZERO has a 4-inch ultra-clear touchscreen — per the NGRAVE homepage: "With a 4' ultra-clear touch screen, your crypto is at your fingertips. If you can use a phone, you can use NGRAVE ZERO." Tap and swipe gestures, intuitively designed. The 4-inch screen is larger than Ledger Stax's 3.7-inch curved E Ink screen and significantly larger than Ledger Nano X's 1.1-inch screen — making transaction-review UX among the best-in-class in the hardware-wallet category.

Custom OS (NGRAVE OS) — built from the ground up

The NGRAVE ZERO runs NGRAVE OS — a custom operating system built from the ground up for the ZERO hardware (per the NGRAVE homepage: "Our fully custom hardware and OS"). Unlike Ledger (which runs BOLOS, its proprietary secure-OS) and Trezor (which runs open-source firmware), NGRAVE developed NGRAVE OS specifically for the ZERO hardware. NGRAVE OS is covered by the EAL7 certification — including the OS, the secure element, and the hardware design are all part of the EAL7 certification scope.

4-layer tamper resistance (metal casing)

The NGRAVE ZERO has 4-layer tamper resistance, starting with its metal casing (per the NGRAVE homepage). The metal casing provides physical attack resistance against drilling / cutting / shock / tampering. The 4-layer tamper resistance is in addition to the EAL7 secure-element certification.

NGRAVE GRAPHENE — world's first encrypted + recoverable stainless-steel seed-phrase backup

NGRAVE GRAPHENE is the world's first encrypted + recoverable stainless-steel seed-phrase backup. Two metal plates:

• Lower plate — contains the seed-phrase punch pattern (the user uses the included punch tool to punch their seed-phrase characters into the lower plate).
• Upper plate — when stacked on top of the lower plate, reveals the seed-phrase characters via an alignment-decryption mechanism; when separated, neither plate alone reveals the full seed phrase.

The two plates are stored separately for theft-resistance (an attacker would need both plates to recover the keys). GRAPHENE is house-fire resistant (high-quality stainless steel; resists ~1400°C / 2550°F house-fire temperatures). This is a meaningful differentiator vs Ledger's "Billfodl" steel-tile backup and Trezor's "Cryptotag" steel-tile backup — both of which use a punch-character-into-steel-tile model without the encryption / two-plate separation model.

NGRAVE LIQUID mobile app — portfolio management without exposing keys

NGRAVE LIQUID is the companion mobile app that pairs with NGRAVE ZERO via QR code. LIQUID manages the user's portfolio — balances, transactions, history — without exposing the keys (keys stay on the ZERO hardware, never on the mobile app). Available on iOS + Android. LIQUID provides a Buy crypto flow via partner Simplex, plus DApp integration via WalletConnect.

MetaMask + Rabby integration (2026 — browser + mobile)

NGRAVE ZERO is compatible with MetaMask and Rabby (per the NGRAVE homepage: "Compatible with Rabby & MetaMask" — visible Fox + Bunny icons for MetaMask and Rabby respectively). Users can connect the NGRAVE ZERO to MetaMask (browser extension) or Rabby (browser extension) for DApp access: transact, stake, swap, bridge — while signing fully offline on the NGRAVE ZERO. This is a meaningful DApp connectivity improvement over hardware wallets that only support WalletConnect; MetaMask + Rabby are the two leading browser-extension wallets for EVM DApp access.

EAL7 security certification — highest available for any financial product

The NGRAVE ZERO is the only financial product in the world that has achieved EAL7 security certification (Common Criteria Evaluation Assurance Level 7). EAL7 is the highest level of security certification available for any financial product — higher than Ledger's EAL6+ (Ledger Flex / Stax / Nano X) and Trezor's EAL6+ (Trezor Safe 5 / 7). EAL7 requires formally-verified design, comprehensive structured testing, and independently verified vulnerability analysis at the highest rigor. NGRAVE achieved EAL7 by using "the same certified security architecture used by defense organizations in Europe" (Military-Grade Security per the NGRAVE homepage). For users who specifically want the absolute highest security certification available on a consumer hardware-wallet product, NGRAVE ZERO is the strongest choice — by a meaningful margin.

Fully air-gapped — no USB / Bluetooth / Wi-Fi (100% offline signing)

The NGRAVE ZERO is fully air-gapped. No USB / Bluetooth / Wi-Fi / NFC connectivity. Communication with the LIQUID mobile app is via QR code only. Private keys never leave the NGRAVE ZERO hardware device and the device is never connected to anything outside its own secure-element core. This is the maximum air-gap achievable in a consumer hardware wallet — same as SafePal S1 and Keystone Pro. Trade-offs: QR-code signing is slower than USB-C / Bluetooth signing (two QR-code scans per transaction); the user needs to have their phone with the LIQUID app installed for every signing session.

Biometric fingerprint sensor — the only hardware wallet with built-in biometrics

The NGRAVE ZERO has a built-in biometric fingerprint sensor. The fingerprint is required for device unlock + transaction-signing authorization — adding a physical-biometric layer on top of the PIN. Even if an attacker has the user's PIN, they can't sign transactions without the user's fingerprint. This is uniquely NGRAVE — no other mainstream consumer hardware-wallet vendor (Ledger, Trezor, SafePal, Keystone, Ellipal) has a built-in biometric fingerprint sensor on their flagship hardware wallet. For users who value physical-biometric layered security, NGRAVE ZERO is uniquely positioned.

4-layer tamper resistance (metal casing)

The NGRAVE ZERO has 4-layer tamper resistance, starting with its metal casing. Physical attack resistance against drilling / cutting / shock / tampering. The 4-layer tamper resistance is in addition to the EAL7 secure-element certification.

Perfect Key generation — keys generated within the secure element (TRNG)

The NGRAVE ZERO's private keys are generated within the secure element using a True Random Number Generator (TRNG) — the keys are generated in hardware, never exposed to software, never exposed to the network, never exposed to NGRAVE. NGRAVE (the company) has no access to user private keys, no access to user funds, and no technical ability to recover a lost wallet (other than through the GRAPHENE backup). Same self-custodial model as Ledger, Trezor, SafePal, Keystone. Perfect Key is NGRAVE's marketing term for this on-device TRNG-based key generation.

NGRAVE GRAPHENE — encrypted + recoverable stainless-steel backup

NGRAVE GRAPHENE is the world's first encrypted + recoverable stainless-steel seed-phrase backup. Two metal plates: the lower plate contains the seed-phrase punch pattern; the upper plate, when stacked on top of the lower plate, reveals the seed-phrase characters via an alignment-decryption mechanism. Stored separately, neither plate alone reveals the full seed phrase — protects against single-plate theft. House-fire resistant (~1400°C / 2550°F high-quality stainless-steel). This is the strongest seed-phrase-backup model in the consumer hardware-wallet category (stronger than Ledger's Billfodl steel-tile punch and Trezor's Cryptotag steel-tile punch, which use a single unencrypted steel-tile-punch model). The GRAPHENE + ZERO pairing is the unique NGRAVE end-to-end security model.

Made in Belgium (European security architecture)

NGRAVE hardware is Made in Belgium (per the NGRAVE homepage: "Created in Europe to deliver uncompromising protection"). The Belgian / European origin matters for users who value regulatory + supply-chain transparency: European hardware-wallet vendors operate under EU consumer-protection + manufacturing regulations, and NGRAVE's EAL7-certified security architecture uses the same certified architecture used by European defense organizations. This is a meaningful trade-off credential vs Ledger (Made in France / China manufacturing mix) and Trezor (Made in Czech Republic / Europe).

Jean-Jacques Quisquater advisor — 2nd reference on the Bitcoin white paper

NGRAVE's co-founder / advisor / contributor Jean-Jacques Quisquater is the 2nd reference on the Bitcoin white paper — the Bitcoin white paper cites Quisquater's 1998 paper on proof-of-work / hashcash. This gives NGRAVE a deep-rooted credibility credential in the Bitcoin / crypto security research community — Quisquater is one of the foundational academic researchers whose work was cited by Satoshi Nakamoto in the Bitcoin white paper. For users sensitive to the academic / research-credibility credentials of hardware-wallet vendors, NGRAVE's Quisquater connection is a unique differentiator.

Independent security audits + EAL7 certification

NGRAVE's hardware, firmware, NGRAVE OS, and GRAPHENE backup have been independently security-audited as part of the EAL7 certification process. The EAL7 certification requires formal verification + comprehensive structured testing by independent accredited security labs. Audit findings are reflected in the EAL7 certificate published on the NGRAVE security portal.

NGRAVE ZERO hardware — one-time purchase

The NGRAVE ZERO retails at approximately $395-$475 USD for the ZERO alone (current pricing varies by promotion; check shop.ngrave.io for current pricing). The NGRAVE Combo Pack (ZERO + GRAPHENE bundled) is the typical entry-point for new NGRAVE users:

• NGRAVE Combo Pack (ZERO + GRAPHENE) — purchased together for the full NGRAVE security model. Per the NGRAVE shop: "Buy Now" link goes to shop.ngrave.io/products/combo-pack-zero-graphene.

NGRAVE GRAPHENE — the ultimate backup (one-time purchase)

NGRAVE GRAPHENE (the encrypted + recoverable stainless-steel backup plate) is sold separately or bundled with the ZERO in the Combo Pack. Standalone ~$99-$139 USD (current pricing at shop.ngrave.io).

Next-Day Free Shipping + 30-day return

Per the NGRAVE store: Next-Day Free Shipping ("We ship the very next day, free for orders above $300"). 30-day return policy — return within 30 days for a full refund.

Flexible payment options — credit card / Bancontact / crypto

NGRAVE store accepts credit card, Bancontact (Belgian payment method), and crypto as payment methods (per the NGRAVE store: "Flexible payment options. Pay with credit card, Bancontact, or even crypto").

NGRAVE LIQUID mobile app — free to download

NGRAVE LIQUID is free to download on iOS + Android. No subscription for the base app.

Buy crypto inside LIQUID — Simplex processor fees

Buy crypto inside NGRAVE LIQUID uses Simplex as the fiat on-ramp processor — fees typically 1.5-5% per transaction plus an exchange rate spread, varying by payment method / jurisdiction. The fee is disclosed in the buy confirmation UI before the user completes.

Swap / Stake / Bridge via MetaMask + Rabby integration

NGRAVE ZERO connects to MetaMask and Rabby for DApp access (swap, stake, bridge, transact). The ZERO signs offline; MetaMask / Rabby broadcasts. Underlying DEX / staking / bridge fees apply (varies by DApp). NGRAVE doesn't charge a separate swap / stake / bridge fee — the user only pays the underlying DApp fees.

Network gas — paid to chain, not NGRAVE

Each transaction signed via NGRAVE ZERO requires network gas paid to the underlying chain validators — NGRAVE doesn't charge gas on behalf of users. Gas is shown transparently in the LIQUID app's transaction confirmation dialog before the user signs the QR-code on the ZERO.

Per the NGRAVE homepage (July 2026): "We support 15 coins and all Ethereum and MultiversX tokens". NGRAVE coin coverage is the trade-off in the NGRAVE security model — narrower than Ledger (5,500+) and Trezor (9,000+), but covering all Ethereum ERC-20 tokens and all MultiversX (ESDT) tokens via the underlying EVM / MultiversX support.

Blockchains explicitly supported (5 chains)

• Bitcoin (BTC)
• Ethereum (ETH) — including ALL ERC-20 tokens
• MultiversX (EGLD) — including ALL ESDT tokens (MultiversX Standard Digital Tokens)
• Plus 2 additional blockchains (likely Litecoin or BNB Chain — full list at ngrave.io/coins)

ERC-20 + ESDT token support

NGRAVE ZERO supports ALL ERC-20 tokens on Ethereum (the full ERC-20 token standard) and ALL ESDT tokens on MultiversX (the MultiversX Standard Digital Token standard). This means the user can hold any ERC-20 / ESDT token on the NGRAVE ZERO, even tokens that aren't in NGRAVE's coin-listing table — the user adds the token contract address in the LIQUID app and the ZERO signs transactions involving that token.

Trade-off: narrow explicit coin-listing vs full ERC-20 / ESDT support

NGRAVE explicitly lists ~15 coins + supports all ERC-20 + all ESDT. This is a meaningful trade-off: the user gets full coverage of the Ethereum token ecosystem + MultiversX token ecosystem, but limited coverage of other L1 / L2 chains (Solana, Cardano, Polkadot, Cosmos, Tezos, Algorand, Tron, XRP — these aren't included in NGRAVE's explicit coin list, July 2026). For users who specifically use Ethereum + MultiversX + Bitcoin, NGRAVE ZERO's coin coverage is fine. For users who want multi-chain coverage across Solana + Cardano + Polkadot + Cosmos + Tezos + XRP + Algorand + Tron + others, NGRAVE ZERO is not the best fit — Ledger (5,500+) and Trezor (9,000+) cover those broader multi-chain use cases. NGRAVE has announced plans to add more blockchains in future updates.

NFT support

Per the NGRAVE homepage: "Protect your Bitcoin, Ethereum, NFTs and other crypto with ease". NGRAVE ZERO supports NFT management (Ethereum NFTs and MultiversX NFTs) via the LIQUID mobile app.