
Keystone
Keystone is an air-gapped hardware wallet for self-custody of Bitcoin, Ethereum, Solana, and many other crypto assets.

What is Keystone?
Keystone (formerly Cobo Vault) is a line of air-gapped hardware wallets that sign transactions over QR codes instead of USB or Bluetooth. Users generate seeds inside multiple secure elements, pair the device with software wallets like MetaMask and Phantom, and approve transfers, swaps, and dApp interactions across Bitcoin, Ethereum, Solana, BNB Chain, TRON, and other supported networks.
Web3 dapps and developer tools related to Keystone
Discover blockchain applications that are frequently used with Keystone.
Developer resources from Alchemy

What is ERC-4337?
ERC-4337 enables smart contract wallets on Ethereum without requiring any consensus-layer protocol changes.

Alchemy Smart Wallets support J.P. Morgan's historic USD deposit token launch
We're proud to announce J.P. Morgan's launch of its first USD deposit token proof of concept on a public blockchain, supported by Alchemy's enterprise-grade infrastructure and smart wallets.

How Exa App reimagined banking with smart wallets
Case study: How Exa App transformed crypto banking with smart wallets, eliminating gas fees and seed phrases for users while reducing their costs by 20x
Keystone alternatives
Explore web3 competitors and apps like Keystone.
App store listings are independently reviewed and written by Alchemy using a combination of inbound submissions, editorial research, public project sources, and third-party directories, including ecosystem data from The Grid under the Open Database License, DefiLlama, DappRadar, Reown, and chain ecosystem pages.

