Description
Nunchuk is a multisig Bitcoin wallet designed to make advanced custody security accessible while pioneering Bitcoin inheritance planning.
Purpose
Built for long-term Bitcoin holders who need more than a basic wallet, Nunchuk eliminates single points of failure through multi-signature technology and provides a comprehensive inheritance solution — all while remaining non-custodial and zero-KYC.
Key Features
- Multi-Signature Wallets — Supports 2-of-3, 2-of-4, and 3-of-5 multisig configurations for robust security
- Bitcoin Inheritance — The first autonomous inheritance solution with on-chain timelocks (guaranteed execution by the Bitcoin network) or flexible off-chain recovery
- Dedicated Inheritance Key — A separate key not used for daily transactions, activated only on a future date you choose
- Extensive Hardware Support — Compatible with COLDCARD, TAPSIGNER, Blockstream Jade, Ledger, Trezor, SeedSigner, BitBox02, TwentyTwo Portal, Foundation Passport, and Keystone
- NFC Signing — World's first NFC-capable Bitcoin cold storage — sign transactions with simple taps on your phone
- Cloud Backups & Assisted Recovery — Wallet configuration securely backed up with easy recovery on new devices
- Emergency Lockdown — Lock down your wallet if facing an imminent threat
- Flexible Spending Policies — Configurable spending limits and co-signing delays for granular security control
- Coin Control & Decoy Wallets — Advanced privacy features for sophisticated users
- Multi-User Collaborative Custody — Co-manage bitcoin with family, groups, or business partners
- Private by Design — No personal data collection beyond email, encrypted messaging, personal blockchain server integration
Use Cases
- Individual self-custody — Secure long-term Bitcoin storage with multisig redundancy
- Family & group custody — Collaborative multi-user wallets for shared funds
- Inheritance planning — Pass Bitcoin to heirs with guaranteed, non-custodial execution
- Bitcoin advisors — Collaborative custody solutions for client funds
Highlights
Pros
- Full zero-KYC, privacy-first design — collects no personal data beyond an email address, with optional private key authentication and encrypted messaging.
- World's first NFC-capable Bitcoin cold storage — sign transactions and set up wallets by simply tapping NFC-compatible hardware to a phone.
- Flexible multisig configurations (2-of-3, 2-of-4, 3-of-5, and custom) with granular policy controls including spending limits, co-signing delays, and emergency lockdown.
- Pioneers autonomous Bitcoin inheritance with on-chain timelocks committed to the Bitcoin blockchain, guaranteeing execution even if Nunchuk ceases to exist.
- Extensive hardware wallet compatibility supporting COLDCARD, TAPSIGNER, Blockstream Jade, Ledger, Trezor, SeedSigner, BitBox02, TwentyTwo, Foundation Passport, and Keystone.
- Fully open-source with verifiable signed builds — all source code is publicly available on GitHub under GPL-3.0, earning a perfect 10/10 open-source score from independent reviewers.
Cons
- Hardware wallets must be purchased separately — no signing device is included with any plan, requiring users to source and configure their own hardware.
- Assisted recovery relies on Nunchuk's cloud servers — while self-sovereign recovery using open standards is always possible, the streamlined in-app assisted recovery path depends on Nunchuk infrastructure.
- Steeper learning curve compared to single-sig or integrated wallets — users must understand multisig concepts, key management, and hardware signing workflows.
- No built-in exchange, swap, lending, or OTC trading — Nunchuk is purely a custody and inheritance coordination tool without financial services.
- Bitcoin-only wallet with no support for altcoins, stablecoins, or multi-chain assets.