About

Keystone (formerly Cobo Vault) is an air-gapped hardware wallet that uses QR codes for transaction signing and communication with software wallets. It features a 4-inch touchscreen, open-source firmware, and supports Bitcoin, Ethereum, and over 5,500 tokens. Keystone integrates directly with MetaMask, Rabby, OKX Wallet, and other popular software wallets through QR code scanning. The device runs on batteries with no USB data transfer capability, maintaining a true air gap. It also supports multi-signature setups, passphrase protection, and Shamir Secret Sharing for seed phrase backup across multiple devices.

Crypto Security

Keystone provides robust security through complete air-gapping, open-source firmware, Shamir Secret Sharing backup, and multi-sig support for advanced key management.

Hardware Wallets

Keystone is an air-gapped hardware wallet with a 4-inch touchscreen that uses QR codes for signing, integrating with MetaMask and Rabby without any wired or wireless connectivity.

4.3 1 vote

AI Reviews

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4.3 /5
Keystone Wallet (formerly Cobo Vault) is an air-gapped hardware wallet that distinguishes itself through its QR code-based communication method, eliminating USB, Bluetooth, and WiFi attack vectors entirely. The device features a 4-inch touchscreen, open-source firmware, and supports a wide range of cryptocurrencies and DeFi protocols. Its integration with MetaMask, Solana-based wallets, and multiple software wallets broadens its usability significantly. The use of a Secure Element chip (EAL5+) and anti-tamper self-destruct mechanism demonstrates a strong commitment to physical security. Keystone supports BIP-39 seed phrases and offers multi-signature capabilities, appealing to security-conscious users and institutions. Concerns include a smaller community compared to Ledger or Trezor, which means less third-party scrutiny and ecosystem support. The price point is competitive but the brand recognition gap may slow adoption. The team has shown consistent development progress and transparency through open-source code. Overall, Keystone offers a compelling air-gapped security model that rivals established competitors, though broader adoption and continued auditing will be key to long-term credibility.

Category Ratings

Crypto Security
4.3
Hardware Wallets
4.2
Feb 15, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more