Nunchuk

Nunchuk

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At a glance

Summary

Everything this inheritance service supports, grouped by category.

Private Keys
Non-custodialThird-Party IndependenceMulti-sig (PSBTs)Key Replacement Assisted SupportHealth ChecksHealth Checks Reminders
Passing Down Alternatives
Direct InheritanceIndirect InheritanceJoint ControlMultiple Beneficiaries (1 per Multisig)
Privacy
Non-KYCCoin ControlCustom NodeTor
Features
Bitcoin-onlyCrypto Specific SolutionMessage for BeneficiaryNotifications to BeneficiaryOnchain TimelockTimelock Refresh Method (On App)Zero Cost to Update Timelock
Hardware Wallets Support
Bitbox02Coldcard Mk4Coldcard QJadeKeystone 3 ProLedger Nano S PlusLedger Nano XPassport CorePortalSeedSignerSpecter DIYTapsignerTrezor Model OneTrezor Safe 3Trezor Safe 5Trezor Model t

Company

BrandNunchuk
Headquarters
USA flagUSA
Full specifications

Every spec, organized

Browse the full breakdown by category. Tap the on any row for what it means, or the for sources and documentation.

Subscription Payment Methods

Which methods of payments you can use to pay the Inheritance Service

BTC On Chain

YES

BTC Lightning

NO

Alt Coins

NO

Credit/Debit Card

YES

Private Keys

Non-custodial

YES

Third-Party Independence

YES

Official Documentation

With the Autonomous recovery (on-chain timelock) you can opt for a Self-serve claim if Nunchuk is unavailable

Single-Sig

NO

Multi-sig (PSBTs)

Required (2-of-4)

Official Documentation

The service only safekeeps one of the keys in your multisig wallet, which requires multiple keys to withdraw funds. The service never has custody of your bitcoins.

Required Hardware Wallet

Tapsigner/Coldcard + 2 hardware keys

Key Replacement Assisted Support

YES

Beneficiary Key Lost Protection

NO

Health Checks

YES

Health Checks Reminders

YES

Passing Down Alternatives

Direct Inheritance

YES

Official Documentation

The simplest way to use the plan is to give the Beneficiary direct control over the two secrets. Upon the Activation Date, they can claim the inheritance for themselves.

Indirect Inheritance

YES

Official Documentation

You can choose to leave both secrets with a trusted guardian. This can be the Trustee of your estate plan. Upon the Activation Date, the Trustee can help the Beneficiary claim the inheritance on their behalf.

Joint Control

YES

Official Documentation

Split the two secrets between the Beneficiary and the Trustee. This will help ensure that each one only has partial control over your bitcoins. Upon the Activation Date, the Beneficiary and Trustee will need to bring together the two secrets in order to claim the inheritance.

Multiple Beneficiaries

1 per Multisig

Assign Percentage to each Beneficiary

Manually

Official Documentation

There is no automatic support to assign percentages to the beneficiares. You need to manually assign the percentage of your funds to each multisig wallet assigned to each beneficiary

Privacy

Non-KYC

YES

Official Documentation

Nunchuk inheritance plan is built on cryptographic secrets, not proof of identity. That means both you and your Beneficiary can keep your privacy.

Each inheritance plan is uniquely identified by a Magic Phrase. The phrase will allow the Beneficiary or Trustee to locate the inheritance's backup data stored on Nunchuk server.

The inheritance's backup data is protected by a password. You will need this password in order to recover the inheritance key during the claiming process.

Coin Control

YES

Custom Node

YES

Tor

YES

Features

Bitcoin-only

YES

Crypto Specific Solution

YES

Exchanges Integration

NO

Message for Beneficiary

YES

Notifications to Beneficiary

YES (by email)

Onchain Timelock

YES

Timelock Refresh Method

On App

Zero Cost to Update Timelock

YES

Waiting Period to Claim

Defined by the owner

Official Documentation

The Owner sets a timelock on the inheritance.

Before the timelock expires, claiming is disallowed.

As long as the Owner is alive, they can keep refreshing the timelock indefinitely.

After the timelock has expired, the Beneficiary can create an account and start a claim. Claiming requires the Beneficiary to know two cryptographic secrets: the Magic Phrase, and the Backup Password.

Once a claim is initiated, an optional Buffer Period ensues (7 days or 30 days).

During the Buffer Period, Nunchuk will notify the Owner of the claiming attempt several times.

Android Support

Supported

YES

Google Play

YES

Official Documentation

Direct APK Download

YES

Official Documentation

Release Notes

YES

Official Documentation

Source-available

YES

Official Documentation

Open Source

YES

License

GPLv3

Official Documentation

Reproducible Builds

YES

iOS Support

Supported

YES

Official Documentation

Release Notes

?

Source-available

NO

Open Source

NO

License

-

Reproducible Builds

NO

Web Support

Supported

NO

MacOS Support

Supported

YES

Release Notes

YES

Official Documentation

Source-available

YES

Official Documentation

Open Source

YES

License

GPLv3

Official Documentation

Reproducible Builds

NO

Linux Support

Supported

YES

Release Notes

YES

Official Documentation

Source-available

YES

Official Documentation

Open Source

YES

License

GPLv3

Official Documentation

Reproducible Builds

NO

Windows Support

Supported

YES

Release Notes

YES

Official Documentation

Source-available

YES

Official Documentation

Open Source

YES

License

GPLv3

Official Documentation

Reproducible Builds

NO

Hardware Wallets Support
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