Vultisig

• Name: Vultisig
• URL: https://vultisig.com/
• Category: self-custody MPC wallet stack / threshold-signature vault platform
• Tags: bitcoin-ecosystem ethereum-ecosystem solana-ecosystem
• Summary: Vultisig is multichain threshold-signature wallet infrastructure. The important split is Fast Vault versus Secure Vault: server-assisted convenience versus heavier multi-device quorum. The marketplace, SDK, and agent tooling sit downstream of that signer model.
• What it does:
  • Operates a seedless threshold-signature wallet system across Bitcoin, Ethereum, Solana, Cosmos-family chains, and dozens of other networks from one vault setup
  • Offers Fast Vaults with server-assisted 2-of-2 signing and Secure Vaults with multi-device threshold signing such as 2-of-3 and 3-of-4 setups
  • Uses distributed vault shares instead of seed phrases and documents emergency recovery only as a last-resort conversion path if the software becomes unavailable
  • Ships a browser extension, web app, and marketplace layer around the core wallet for dapp access, monitoring, and automation use cases
  • Publishes developer-facing SDK, CLI, and MCP tooling for programmatic vault creation, address derivation, balance queries, signing, and cross-chain operations
  • Maintains public documentation around DKLS23 / GG20, key generation, keysign flows, audits, and operational security guidance
• Key claims:
  • The homepage says Vultisig is a free MPC wallet that makes seed phrases obsolete, uses DKLS23-based multi-party computation, supports 30+ chains, and has secured $500M+ in assets with 50K+ active vaults
  • The docs overview says Vultisig is an open-source seedless cryptocurrency vault available across mobile, desktop, and browser-extension surfaces, and distinguishes Fast Vault and Secure Vault operating modes
  • The security-and-technology overview says no complete private key is ever constructed, signatures are assembled from distributed shares, DKLS23 is the current default protocol, and emergency recovery exists only as a last-resort escape hatch
  • The security page says the project emphasizes open-source transparency, professional audits, and a responsible-disclosure process, and links the DKLS23 implementation to a Trail of Bits audit via Silence Laboratories
  • The GitHub organization overview says Vultisig is expanding beyond the core wallet into a Chrome extension, web version, marketplace for plugins and AI agents, TypeScript SDK, CLI, and MCP server
  • The SDK implementation guide documents vault creation, address derivation, balance checks, transaction signing, swap flows, stateless usage, and storage/password-management patterns, which confirms a real developer platform rather than a marketing-only surface
• Whitepaper: No canonical standalone Vultisig whitepaper or litepaper surfaced in this pass. The clearest current sources of truth were the official site, docs portal, security / technical docs, GitHub organization overview, and SDK documentation; see ../whitepapers/vultisig-primary-sources-2026-05-01.md.
• Sources:
  • https://vultisig.com/
  • https://docs.vultisig.com/
  • https://docs.vultisig.com/security-and-technology/overview.md
  • https://docs.vultisig.com/help-and-legal/security
  • https://docs.vultisig.com/developer-docs/vultisig-sdk/sdk-users-guide.md
  • https://github.com/vultisig

Internal linkages

• Best self-custody recovery comparison: bitkey.
• Best operator-platform contrast: fireblocks.
• Keep Vultisig on that split: self-custody signer topology on one side, operator-heavy wallet workflow on the other.

Control surface

• Practical leverage sits in whether users choose Fast Vault or Secure Vault modes, how share backups and device quorum are handled, which chains and swap paths get first-class support, and how plugins or agent tooling are allowed to act on top of the vault.

• The real risk is not MPC in the abstract. It is the operating model wrapped around it.

• Read Vultisig as a signer-topology note first and an automation platform second.

• Last reviewed: 2026-06-16 UTC