NGRAVE Zero Review 2025: How Secure Is This Wallet? 

Crypto theft isn’t slowing down. According to Chainalysis, more than $2.17 billion has already been stolen in 2025, and nearly a quarter of those attacks targeted personal wallets. Even so-called “cold” wallets that connect through USB or Bluetooth still carry minor but serious security risks. 

Losing your private keys or seed phrase can mean losing everything; one mistake or exploit is all it takes to erase years of savings. 

That’s where NGRAVE wallet sets itself apart. It’s a fully air-gapped hardware wallet designed for complete self-custody, keeping your crypto assets safe from online exploits and physical tampering.

In this NGRAVE Zero Review 2025, we’ll explore everything that matters: from its design, setup, and user experience to its advanced security features, so you can decide if it’s truly the most secure crypto wallet on the market.  

What Is the NGRAVE Zero Hardware Wallet? 

The NGRAVE Zero Wallet is a next-generation air-gapped hardware wallet designed to give you complete control over your crypto, completely offline. Unlike most wallets, the Zero has no USB, Bluetooth, Wi-Fi, or NFC connections. Everything happens through QR codes, keeping your private keys isolated from the internet at all times. 

This approach eliminates remote hacking risks, making Zero one of the few wallets that operate in total offline isolation. Even firmware updates are done via a microSD card, maintaining the same air-gapped principle. 

About NGRAVE: Company and Mission 

NGRAVE is a Belgium-based blockchain security company founded in 2018. Its mission is to give crypto holders full control and ownership of their assets without relying on third parties. The company focuses on one core principle: self-custody without compromise. Every NGRAVE product is designed to ensure users, not third parties, have complete control over their funds. 

On Trustpilot, NGRAVE is highly rated for reliability, product quality, and responsive customer support, reflecting its strong commitment to security and transparency. 

The NGRAVE Ecosystem: Zero, Graphen, and Liquid 

The NGRAVE system is built around three main components that work together for maximum protection: 

• NGRAVE Zero: The air-gapped hardware wallet where private keys are generated and stored entirely offline. 
• NGRAVE Liquid App: A companion mobile app (iOS and Android) that helps you track your portfolio, prepare transactions, and broadcast them using QR codes, without ever exposing private keys. 
• Graphene Backup: A two-layer stainless-steel backup system that safely stores your recovery phrase, protecting it from fire, corrosion, and physical damage. 

Together, these tools create a closed security loop, spanning from offline key generation to tamper-proof backup and secure transaction broadcasting. 

Supported Assets and Integrations 

The NGRAVE Zero supports major cryptocurrencies, including Bitcoin (BTC), Ethereum (ETH), Polygon (MATIC), Binance Smart Chain (BNB), and thousands of ERC-20 tokens. 

The Zero makes managing your crypto assets secure and straightforward. Using the Liquid app, users can manage their portfolio, check balances, and send transactions, all while keeping the Zero offline.

With each firmware update, the NGRAVE crypto wallet expands its compatibility with emerging tokens and Web3 platforms. 

Pricing and Where to Buy 

The NGRAVE Zero sits at the premium end of the hardware wallet market. The standalone device is priced at $398 USD on NGRAVE’s official store. 

If you want the Graphene backup included, you can opt for the Ultimate Combo Pack. That bundle typically sells for $498 USD (i.e., Zero + Graphene together). You might also see the Graphene backup offered separately (for users who already own a Zero). Many sources cite a standalone price of around $148 USD for Graphene. 

Where should you buy? 

Due to the security risks associated with tampered or counterfeit devices, it’s strongly recommended that you purchase only from the official NGRAVE website or authorized resellers. 

On the official NGRAVE shop, you’ll also often find terms like “free shipping” (depending on region), a 30-day return policy, and support for multiple payment methods (credit cards, PayPal, crypto) 

Warranty and support 

Every Zero hardware wallet comes with a 2-year warranty (on the device hardware and internal components). 

NGRAVE offers customer support via email and live chat. If there’s any sign of tampering or your device arrives damaged, contact NGRAVE immediately before proceeding with setup. 

NGRAVE Zero: Design and Build Quality 

The NGRAVE hardware wallet is built to last. Its aerospace-grade aluminum body gives it a premium feel while ensuring durability against scratches, pressure, and drops. The frame is sturdy, lightweight, and resistant to bending, a clear upgrade over the plastic builds of most hardware wallets. 

Key specs: 

• Dimensions: ~12 × 6 × 1 cm; 
• Weight: ~130 g; 
• Material: Aluminum chassis with matte finish; 
• Build: Rigid, tamper-evident construction. 

The overall feel is sleek yet rugged, like a compact smartphone engineered for security rather than style. 

Touchscreen and Interface Experience 

One of Zero standout features is its 4-inch color touchscreen with a 480 x 800 pixel resolution. The display is bright, sharp, and easy to read, even in daylight. 

The user interface is designed for simplicity and ease of use. Navigation ensures smooth user interaction, with responsive touch controls that make it easy to: 

• Set up and configure the wallet; 
• Review transactions before signing; 
• Scan QR codes quickly and accurately. 

Unlike other hardware wallets that rely on physical buttons, the NGRAVE Zero offers a modern, fully touch-based experience, combining usability with maximum isolation from external connections.

Battery Life and Offline Operation 

The Zero includes a rechargeable lithium-ion battery that provides hours of active use and up to two weeks of standby power on a single charge. 

Charging is performed through a USB-C port, which is used exclusively for power or firmware updates, and not for data transfer. This air-gapped QR workflow ensures that the device remains completely isolated from networks, including Wi-Fi, Bluetooth, and USB data connections. 

Durability and Tamper Resistance 

The Zero design includes multiple layers of physical security to prevent tampering or unauthorized access. 

• The aluminum shell is tamper-evident, showing visible signs if opened. 
• Internal mechanisms can trigger a secure auto-wipe if interference is detected. 
• Components are shielded and sealed, reducing the risk of hardware-level attacks. 

This ensures that your private keys remain safe even if someone gains physical access to your wallet. 

NGRAVE Zero: Security Features 

1. EAL7 Certification: The Highest Security Standard 

NGRAVE Zero stands out as the world’s first hardware wallet to achieve EAL7 certification, the highest level under the Common Criteria for Information Technology Security Evaluation. 

Most competing wallets, such as Ledger or Trezor, hold EAL5+ certification, which is impressive but not comparable. EAL7 requires the formal verification of both software and hardware security layers.  

In simple terms, this means Zero architecture has undergone rigorous third-party audits to confirm it performs exactly as intended, with no hidden vulnerabilities or exploitable behavior. This certification puts NGRAVE Zero on par with military-grade and government-level security devices, protecting users against online threats, phishing attempts, and remote exploits. 

2. 100% Air-Gapped Architecture 

This air-gapped setup makes the Zero one of the few true cold storage solutions that never exposes your keys to an external connection. All interactions occur via QR codes, maintaining a one-way data flow that never exposes your private keys. Here’s how it works: 

1. The Liquid app generates a transaction QR code. 
2. Zero scans and signs the transaction offline. 
3. The signed transaction is converted back into a QR code, which the app then broadcasts. 

By keeping your private keys offline, NGRAVE eliminates any risk of exposure during transactions or updates. 

3. Biometric and Multi-Layer PIN Protection 

Zero goes beyond the traditional PIN system by integrating biometric authentication. Each device allows users to register their fingerprint, adding a layer of protection on top of a customizable multi-digit PIN code. 

If someone attempts to tamper with the wallet or repeatedly enters incorrect credentials, the system can automatically trigger a secure wipe, erasing all sensitive data. 

Combined, these safeguards prevent unauthorized physical access and protect against brute-force or side-channel attacks. 

4. Secure Key Generation and Storage 

Private keys are generated entirely within the NGRAVE Zero, using its True Random Number Generator (TRNG), a certified hardware component that ensures unpredictability and entropy. 

The keys never leave the device, are never transmitted, and are encrypted within the wallet’s secure element. Even during the recovery phrase creation process, users view the seed only once on the screen, ensuring complete offline isolation throughout the setup. 

The NGRAVE Graphene Backup System 

Unlike paper wallets, the dual-layer GRAPHENE design ensures secure storage of your recovery phrase, resistant to fire, corrosion, and damage. The system has two parts: 

• Top Plate: Contains customizable holes that represent your recovery phrase. 
• Bottom Plate: Holds the engraved template used to decode those holes. 

When combined, the two plates reveal your complete seed phrase. However, when separated, neither layer reveals any readable information, rendering it useless to anyone who finds just one plate. 

Secure and Straightforward Backup Process 

Setting up your GRAPHENE backup is straightforward: 

1. During setup, the NGRAVE Zero generates your recovery phrase offline. 
2. You engrave or punch the words onto the GRAPHENE plates using the included tools. 
3. Store the two plates separately, ideally in different secure locations. 

If you ever need to recover your wallet, simply reunite the two plates to recreate your seed phrase. You can then restore your crypto access without ever exposing your recovery words to the internet or a camera. 

Performance and User Experience 

1. Setup and Onboarding 

Setting up the Zero is easy, even if it’s your first hardware wallet. The setup wizard guides you through each step, including creating your PIN, adding your fingerprint, and generating your recovery phrase. The on-screen instructions are clear and straightforward. You don’t need cables or an internet connection at any point. 

When paired with the LIQUID app, setup and management become even smoother. You can track your portfolio and prepare transactions without ever needing to connect the wallet to a network. 

2. Daily Use and Navigation 

The 4-inch touchscreen makes using the Zero feel natural. Swiping, scanning QR codes, and confirming transactions are quick and responsive. Compared to other wallets with physical buttons, the touchscreen offers a more modern, smartphone-like feel, without sacrificing security. 

Its QR code scanning system makes it fast and secure to sign transactions without ever requiring a network connection. 

3. Firmware Updates 

Updating your Zero is just as secure. Download the latest firmware to your computer or phone, then move it to a microSD card and install it on the wallet, all without an internet connection. This keeps the device air-gapped at all times, eliminating the risk of online attacks during updates. 

Overall User Experience 

The NGRAVE Zero delivers a mix of top-level security and everyday usability. The interface is modern and straightforward. The build feels solid and reliable. Every action (from setup to sending transactions) reinforces your control over your crypto. 

The only tradeoff? The QR-based process can be slightly slower than plug-in wallets like the Ledger Nano X. But that’s a small price to pay for total offline protection. 

Benefits and Drawbacks of NGRAVE Zero 

Comparison with Other Hardware Wallets 

NGRAVE Zero vs Ledger Nano X

NGRAVE ZERO vs Trezor Model T 

For readers who want to explore Trezor’s features, security standards, and performance in more depth, you can check out our detailed Trezor Model T review or the difference between Trezor Model T and Ledger Nano X.

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