Ngrave Zero Hardware Wallet Review
The Only Financial Product With EAL7 Security Certification — Is It Worth the Premium?
| Package | Price | Includes | Display | Air-Gapped | Biometric | EAL7 OS | Coin Support | Buy Now |
|---|---|---|---|---|---|---|---|---|
| Zero | $398 | Hardware wallet only | 4 inch color touchscreen 480×800 | Yes 100% no USB WiFi Bluetooth NFC | Yes fingerprint | Yes | Bitcoin ETH 1000 plus coins | Buy Now |
| Combo Pack | $498 | Zero wallet plus Graphene steel backup | 4 inch color touchscreen 480×800 | Yes 100% no USB WiFi Bluetooth NFC | Yes fingerprint | Yes | Bitcoin ETH 1000 plus coins | Buy Now |
The Belgian Company That Built The Most Certified Hardware Wallet In The World
NGRAVE launched in 2018 when Ruben Merre (CEO), Xavier Hendrickx (CTO), and Edouard Vanham (COO) came together in Ghent with a singular mission: build the NGRAVE coldest wallet ever made. Frustrated by existing hardware wallets that forced too many security trade-offs, these three crypto-native founders designed a device that lives up to its name. ZERO means zero connections, no compromises, and removal of every attack vector. The company manufactures in Belgium and ships worldwide to users demanding maximum security.
What truly distinguishes NGRAVE from every competitor is their EAL7 certification — the highest security rating in the Common Criteria framework, reserved entirely for military and government applications. The NGRAVE Zero stands alone as the only consumer financial product with EAL7 hardware wallet status. Achieving this required formal mathematical verification of every security function, something no other manufacturer has accomplished.
NGRAVE has earned institutional backing and maintains an exceptional reputation. Their 4.7 out of 5 Trustpilot score from 313 verified reviews ranks highest among all five major hardware wallet brands. Users consistently praise the responsive support team, and CEO Ruben Merre remains actively involved with the community.
Why Serious Holders Choose NGRAVE Zero
The $398 price of NGRAVE Zero is not a premium for aesthetics — it is the cost of every security certification test, every independent audit, and the only EAL7 certified consumer financial product ever built. The question is not whether you can afford NGRAVE Zero, but whether the holdings you are protecting justify anything less.
EAL7 — Highest Security Certification Worldwide
EAL7 is the highest level in the Common Criteria framework, normally reserved for military and government systems. No other consumer financial product in the world has achieved it. It required formal mathematical verification of every security function in the NGRAVE Zero.
100 Percent Air-Gapped — Zero Connections
No USB data port, no Bluetooth, no WiFi, no NFC, no 4G — NGRAVE Zero has zero wireless or wired connections. Every transaction is signed offline via QR codes only. The USB-C port exists only for charging, never for data, eliminating every network-based attack vector.
Biometric Fingerprint Authentication
NGRAVE Zero includes a fingerprint scanner used during both device unlock and the Perfect Key generation process. Your fingerprint contributes actual entropy to your private key, meaning it is mathematically part of your security, not merely a convenience feature.
4-Inch Touchscreen — Largest of Any Reviewed Wallet
The 4-inch, 480 by 800 pixel color touchscreen is the largest display of any hardware wallet reviewed on this site. Every address, amount, and transaction detail is rendered at a size you can actually verify without squinting. Designed like a premium smartphone, not a calculator.
4.7 Trustpilot — Highest of All Five Brands
NGRAVE has the highest Trustpilot score of all five hardware wallet brands reviewed on this site at 4.7 out of 5 from 313 verified reviews. Customers consistently praise the setup experience, the support team, and the premium build quality of the device.
Complete End-to-End Ecosystem
NGRAVE Zero works within a complete three-part ecosystem — the ZERO device for offline key storage, the GRAPHENE steel plates for indestructible backup, and the LIQUID app for iOS and Android transaction management. Every part of self-custody is covered by one manufacturer with one security philosophy.
EAL7 — The Security Certification No Other Financial Product Has
Common Criteria EAL7 represents the highest internationally recognized security certification level. While military systems achieve this standard, most consumer hardware wallets halt at EAL6. NGRAVE Zero stands alone as the only financial product worldwide to earn EAL7 certification under this exhaustive framework.
What the EAL Levels Actually Mean
What EAL7 Required NGRAVE to Prove
Formal Mathematical Verification
Every security function in the device had to be proven correct using formal mathematical methods — not only tested but mathematically verified, a requirement that eliminated every other consumer financial product from achieving this level.
Independent Lab Testing
The entire device was submitted to an accredited independent security laboratory for exhaustive testing against every known attack vector, the lab findings were reviewed by a national certification authority before EAL7 was granted.
Complete Design Transparency
NGRAVE had to provide complete design documentation for every component of the device — hardware firmware and operating system — allowing auditors to verify that implementation matched specification at every level.
Custom Operating System Built From Scratch
Because no existing operating system could meet EAL7 requirements NGRAVE built a custom OS entirely from the ground up — every line of code written and verified specifically to achieve this certification.
“The NGRAVE product is the most advanced solution, really exceeding the state-of-the-art as publicly known today. This really surpasses the competition.”
Independent EAL7 evaluator assessmentThe Perfect Key. The GRAPHENE Backup. Nothing Like Either.
Most hardware wallets rely on standard 24-word seed phrases for private key backup. NGRAVE took a fundamentally different approach by developing two proprietary security systems working in harmony. The Perfect Key generates cryptographically secure keys using multiple entropy sources, while the GRAPHENE backup transforms your key into a durable physical steel format.
The Perfect Key — 64 Characters of True Entropy
The Perfect Key generates your private key using three independent entropy sources: camera input capturing environmental noise, physical motion sensors reading device acceleration, and input from the NGRAVE hardware itself. These feeds combine in real-time to create a 64-character hexadecimal key. You maintain complete control, with the ability to pause, shuffle, and verify sources before finalizing.
The GRAPHENE — An Encrypted Two-Plate Steel Puzzle
The GRAPHENE transforms your private key into a physical format through hex-encoded character mapping across two stainless steel plates. Upper and lower plates contain complementary positions that only reveal your key when properly aligned. Advanced encoding ensures each plate separately appears meaningless. The upper plate can be secured at an additional location using the Ultimate Recovery Code.
NGRAVE LIQUID — Your Zero Never Connects. Your App Handles the Rest.
The NGRAVE Zero never connects to anything. All network communication happens through the LIQUID companion app on your phone. The Zero signs transactions offline via QR code, and the app broadcasts them to the blockchain. This separation between signing device and network device is the architectural foundation of NGRAVE security model.
Full iOS and Android Support
NGRAVE LIQUID is available on both iPhone and Android with identical full functionality. The app manages your portfolio, initiates transactions, and broadcasts signed transactions to the blockchain. No desktop software required and no USB connection ever needed.
QR Code Transaction Flow
To send funds, you initiate the transaction in LIQUID which generates a QR code. Scan it with your ZERO camera for offline signing. The ZERO displays a second QR code which you scan back into LIQUID for broadcasting. The private key never leaves the device at any point.
Portfolio and Asset Management
LIQUID displays your full portfolio balance across all supported coins and tokens, tracks transaction history, shows market data, and allows you to create multiple wallet profiles. All account data is managed in the app while private keys remain exclusively on the ZERO device.
Buy and Swap Built In
Buy cryptocurrency directly in LIQUID using credit card or bank transfer through integrated third-party providers. Swap between assets within the app. All purchases and swaps still require the ZERO device to sign before any transaction completes.
MetaMask and Rabby Compatible
Advanced users can connect NGRAVE Zero to MetaMask and Rabby for DeFi access. The Zero signs all transactions offline via QR code while MetaMask or Rabby handles the dApp interface, bringing hardware wallet security to decentralised applications without any direct connection.
Is NGRAVE Zero Right for You?
Determining who should buy NGRAVE Zero requires honest self-assessment of your holdings and security priorities. At $398, this device represents a significant investment that delivers exceptional value for specific buyer profiles, but may not align with every user’s needs or budget constraints.
You hold significant digital wealth where $398 represents minor protection cost against total loss. When your portfolio exceeds five figures, this price becomes trivial security insurance.
EAL7 certification and mathematical verification matter to you. The NGRAVE Zero offers the highest security certification available on any hardware wallet in production.
You value a complete end-to-end security ecosystem including the GRAPHENE steel backup solution and LIQUID mobile companion application working together seamlessly.
Premium build quality and large touchscreen interfaces appeal to you. You want a serious security tool that feels like professional equipment, not a disposable gadget.
Your portfolio spans diverse assets beyond Bitcoin. With support for over 1000 coins and tokens, NGRAVE Zero accommodates multi-asset investors.
This is your first hardware wallet. Beginners should start with the Trezor Safe 5 or Blockstream Jade to learn fundamentals before graduating to premium devices.
You hold Bitcoin exclusively and prioritize open-source firmware transparency. Consider the Coldcard with its fully auditable codebase and air-gapped design.
Your security model requires multisignature transaction support. The NGRAVE Zero currently does not support multisig configurations in its firmware.
You depend on third-party software wallet compatibility. NGRAVE Zero operates within its own ecosystem, limiting integration with external wallet applications.
Your budget sits under $200. The Trezor Safe 5 or similar alternatives provide solid security at roughly half the price, better fitting constrained spending plans.
If you recognize yourself in the left column, the NGRAVE Zero represents a sound purchase decision that will protect your assets for years. For those in the right column, excellent alternatives exist at lower price points. The right wallet for you always depends on your specific situation, holdings, and technical requirements.
Our NGRAVE Zero Verdict
After thoroughly testing every aspect of this device, our NGRAVE Zero verdict is clear: this is the most certified hardware wallet on the market today. For Bitcoin users who prioritize security certifications and absolute air-gapped protection, our NGRAVE Zero review conclusion confirms that is NGRAVE Zero worth it? Absolutely—if you value EAL7 certification and zero-attack-surface design above all else.
✓EAL7 certification — the only financial product in the world to achieve it
✓Zero connections of any kind — no USB data no Bluetooth no WiFi no NFC
✓GRAPHENE two-plate encrypted steel backup is unique in the market
✓Highest Trustpilot score of all five brands at 4.7 from 313 verified reviews
✓Complete ecosystem — ZERO plus GRAPHENE plus LIQUID covers every step
✗No multisig support — single-user storage only at time of writing
✗Limited third-party wallet compatibility compared to Coldcard or Trezor
✗Firmware not fully open-source — partial transparency only
✗QR-only workflow adds friction for frequent transactions
NGRAVE Zero — The Worlds Most Certified Hardware Wallet
For serious holders where security certification matters more than priceNGRAVE Zero FAQ
Answers to the most common NGRAVE Zero questions
What does EAL7 actually mean and why does it matter?
EAL7 stands for Evaluation Assurance Level 7, the highest certification available under the Common Criteria framework. This requires formal mathematical verification that every line of code performs exactly as intended. NGRAVE Zero achieved this rating after years of rigorous testing, placing it in an elite category with aerospace and military hardware. This certification provides mathematical proof of security that consumer-grade wallets cannot match.
Does NGRAVE Zero work with iPhone?
Yes, NGRAVE Zero works fully with iPhone through the NGRAVE LIQUID companion app, available on the App Store. Unlike competitors such as Trezor that only offer view-only support on iOS, NGRAVE enables complete transaction signing and device management from iPhones. The app also supports Android devices with identical functionality. This full iOS compatibility distinguishes NGRAVE in the premium hardware wallet market.
What is the NGRAVE Perfect Key and how is it different from a seed phrase?
The NGRAVE Perfect Key is a 64-character hexadecimal key generated from three entropy sources: a hardware random number generator, fingerprint sensor, and ambient light sensor readings. This produces equivalent entropy to a 24-word seed phrase while offering additional security layers. Users can export the Perfect Key as a standard BIP39 seed phrase for compatibility with other wallets if needed.
What is the NGRAVE GRAPHENE and do I need it?
GRAPHENE is NGRAVE’s two-plate stainless steel backup system where users punch their key into corrosion-resistant metal plates. This backup withstands temperatures up to 1375 degrees Celsius and is fully waterproof. The GRAPHENE is not included in the $398 NGRAVE Zero price and must be purchased separately for approximately $145. It is highly recommended for serious holdings.
Is NGRAVE Zero fully open source?
The NGRAVE LIQUID companion app is open source, while the firmware remains partially closed source. NGRAVE has announced plans to open more of their codebase over time. This differs from competitors like Coldcard and Trezor, which offer fully auditable open-source firmware. Security researchers can still verify the EAL7 certification independently, which provides third-party validation beyond source code access.
How does NGRAVE Zero compare to Coldcard?
NGRAVE Zero excels in EAL7 certification, multi-coin support, and native iPhone compatibility. Coldcard dominates with fully open-source firmware, dedicated Bitcoin features like SeedXOR and Trick PINs, and a significantly lower price point of around $158. Coldcard suits Bitcoin maximalists prioritizing code transparency, while NGRAVE targets users seeking highest-level security certification with broad asset support.
What happens if NGRAVE the company goes bankrupt?
Your assets remain secure on the blockchain regardless of company status. You can restore your wallet using your backup on any BIP39-compatible device. If you own the GRAPHENE backup plates, your key remains physically accessible without any company support. This embodies true self-custody: no servers, no service dependencies, and no corporate gatekeeping over your funds.
Is NGRAVE Zero worth $398 compared to cheaper alternatives?
For Bitcoin holdings exceeding $50,000, the $398 NGRAVE Zero price is justified by EAL7 certification and premium backup options. For smaller portfolios under $10,000, alternatives such as Trezor Safe 5 or Blockstream Jade deliver excellent security at lower price points. The decision depends on portfolio size, risk tolerance, and whether you value military-grade certification over cost savings.