A wallet without private keys. Lives in the network. Opens in a browser.

OISY Wallet was incubated at the DFINITY Foundation to simplify DeFi navigation. Initially built for ICP, it quickly evolved to unify primitives across all DeFi chains. Today, OISY is the world’s first fully on-chain digital asset wallet — consolidating chains, identities, and primitives into a single immutable DeFi terminal.

Unlike traditional wallets that require browser extensions or downloads, OISY operates directly from your web browser, enabling secure, passkey-enabled sign-ins without reliance on third-party servers. This eliminates the security vulnerabilities common to browser extensions and provides a more streamlined experience.

Powered by ICP’s Chain Fusion technology, OISY delivers security, transparency, and scalability by default. Chain Fusion enables OISY to natively interact with Bitcoin, Ethereum, and other major blockchains without bridges or wrapped tokens, providing true multichain functionality.

Getting started

Visit oisy.com and click Open or Create to begin. You’ll create an Internet Identity, which serves as your decentralized identity across the Internet Computer ecosystem. Once set up, your OISY Wallet is automatically generated and ready to use.

Connecting to dApps

OISY supports seamless connections to decentralized applications via WalletConnect and Internet Computer protocols. Whether you’re trading on Uniswap, interacting with ICP dApps, or exploring DeFi platforms, OISY provides a unified interface for all your Web3 activities. Developers can integrate OISY into their applications using IdentityKit for React or other ICP building blocks.

Traditional wallets require users to manage private keys, install browser extensions, and juggle multiple wallets for different blockchains. OISY eliminates these complexities through its innovative network-custody model and Chain Fusion technology.

The network-custody approach means that private keys don’t physically exist in a single location. Instead, assets are controlled by a distributed cryptographic threshold protocol on the Internet Computer. No individual entity, including OISY itself, can gain full control over your keys.

Powered by Chain Fusion

Chain Fusion enables OISY to interact directly with Bitcoin, Ethereum, and other major blockchains without bridges or wrapped tokens. Send Bitcoin, swap Ethereum tokens, interact with ICP dApps — all from a single wallet interface, with every transaction secured by the Internet Computer’s tamperproof infrastructure.

Internet Identity integration

Internet Identity provides a seamless, password-free authentication experience. Your identity is cryptographically secured and works from any device using biometric authentication or security keys — eliminating password-based attacks and providing a consistent experience across all your devices.

Developer-friendly integration

For developers, OISY offers comprehensive integration tools including IdentityKit for React, enabling easy wallet connections in dApps. The wallet supports ICP signer standards and the WalletConnect protocol, making it compatible with the entire Web3 ecosystem — whether building on ICP or integrating with Ethereum-based dApps.