No official phone numbers are published by NGRAVE. All communications are through email and social channels.
NGRAVE is a Belgium (BE)–based blockchain security company that develops ultra-secure, air-gapped hardware wallets for self-custody of cryptocurrencies and digital assets. Founded in 2018, NGRAVE’s flagship product, the NGRAVE ZERO, is often called the world’s most secure hardware wallet. Unlike traditional wallets, ZERO is 100% offline, featuring no Wi-Fi, Bluetooth, NFC, or USB connectivity. Instead, it uses QR code communication to interact with the companion mobile app LIQUID, which allows users to manage assets securely. NGRAVE also provides GRAPHENE, a recoverable stainless-steel backup solution.
Air-Gapped Security: ZERO operates fully offline — no internet, USB, or wireless connections.
EAL7 Certified OS: The highest security certification level for operating systems.
Biometric Authentication: Fingerprint sensor for secure access.
QR Code Transaction System: Transactions are signed offline and shared via QR codes.
GRAPHENE Backup: Stainless-steel, fire- and water-resistant recovery sheet.
Multi-Currency Support: Bitcoin, Ethereum, ERC-20, Binance Smart Chain, Polkadot, NFTs, and more.
LIQUID Mobile App: For portfolio management, transaction history, and updates.
Future-Proof Design: Firmware updates can be applied securely via microSD.