VultisigDownload

One device.
Instant signing.

Fast Vault pairs your device with a secure Vultiserver as an automatic second signer. You get the speed of a single-signature wallet, with the protection of a threshold signature scheme.

Create a Fast VaultSecure Vault Comparison
A phone on a pedestal showing the Fast Vault setup screen, beside a shield on a server stack and floating lightning-bolt coins

Two shares, one signature.

Fast Vault is a genuine 2-of-2 threshold setup.

  • Blue phone with a lightning bolt on its screen

    Pair your device

    Your phone or laptop generates one vault share on setup. No seed phrase is ever created.

  • Purple server unit with plugged-in cables

    Vultiserver co-signs

    A second share lives on Vultiserver, an automated co-signer. It can only participate, never initiate.

  • Green badge with a check mark

    Sign in one tap

    Approve on your device, Vultiserver adds its signature automatically. Two shares, one signature.

Live in under two minutes.

From download to your first signed transaction.

Create Fast Vault
Vultisig app splash screen on a phone

  1. Download Vultisig & choose Fast Vault

    Available on iOS, Android, macOS, Windows, Linux, and as a browser extension.

  2. Name your vault & enter your email

    Your email is used once, to send your server share backup. Vultisig doesn't retain it.

  3. Set a password

    This encrypts your server share backup.

  4. Confirm and back up your device share

    Enter the verification code sent to your email, then store your device share somewhere other than the device itself.

  5. Start sending

    One tap on your device, one automatic co-sign from Vultiserver.

Fast Vault is still a threshold signature scheme.

Vultiserver holds one of two shares and has no ability to act on its own.

  • Dark server tower with orange drive bays

    Vultiserver gets compromised

    It holds only one of two shares and can never initiate a transaction alone. An attacker would still need your device's share.

  • Orange phone lying flat on a grey slab

    Your device is lost or stolen

    You store and hold both backups, import your device backup into a new device if your old one is lost or stolen. Recovered in minutes.

  • Orange box with a downward arrow

    Vultiserver goes offline

    You are in full control. Import the Server backup into a second device and use it as a normal Secure Vault.

A shield standing on a server on a dark tiled floor

Fast Vault VS. Secure Vault

Fast Vault compared with Secure Vault across devices required, signing, best use and setup
FeatureFast VaultSecure Vault
Devices required1 device + Vultiserver2+ devices
SigningOne tap, automatic co-signRequires multiple devices to sign
Best forDaily spending, smaller amountsLong-term holdings, larger amounts
SetupEmail + passwordPhysical devices only

Both are keyless. Neither requires a seed phrase.

See Secure Vault

Common questions about Fast Vault

The Only Wallet You'll Ever Need.

No seed phrase. No subscription. No custodian. Just your crypto, secured by math - not trust.

App StoreMacOSGoogle PlayWindowsLinuxAndroid