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Vultisig

Vultisig is a free, open-source, multi-party computation (MPC) crypto wallet that eliminates seed phrases by splitting private keys across multiple devices. It serves individual crypto users and self-custody enthusiasts across 30+ blockchains, and also offers a TypeScript SDK enabling AI agents to hold and move funds securely.
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Description

Vultisig is a seedless, MPC-based crypto wallet that uses multi-party computation to provide native multi-factor authentication, removing the single point of failure inherent in traditional seed-phrase wallets. It offers two vault setups: a Fast Vault for quick, single-device daily use co-signed by Vultiserver, and a Secure Vault using multiple devices with M-of-N threshold signing for maximum protection. The platform supports over 30 blockchains natively, including Bitcoin, Ethereum, Solana, THORChain, Cosmos, Polygon, Avalanche, Arbitrum, Optimism, BNB Chain, Polkadot, and Cardano, and includes features like cross-chain swaps and secure notifications. Vultisig is fully open source and audited, uses the modern DKLS23 protocol, and holders of its $VULT token receive reduced swap fees across six tiers. It targets everyday crypto users seeking self-custody, as well as developers and AI agents via its TypeScript SDK for agentic, autonomous transactions.