Services directory · Custody
Nunchuk
Multisig wallet software with collaborative custody and inheritance features — open-source clients.
Nunchuk is multisig wallet software with collaborative custody and inheritance features, built around open-source clients you can verify. It lets ordinary users create and manage multisig vaults — including shared "collaborative" wallets with family or a key partner — without running a server.
Because the clients are open-source and the model is key-based, you keep full control and can walk away with your keys at any time. It appeals to more technical self-custodians who want multisig and inheritance tooling without a subscription concierge; the flip side is that more of the setup and responsibility sits with you.
Other custody services
AnchorWatch
Insured Bitcoin custody using time-locked multisig (Trident) — keys stay distributed while the bitcoin carries real insurance. US.
Casa
Multisig self-custody with concierge support — keys stay yours, Casa helps you not lose them.
Theya
Mobile-first multisig self-custody — set up a 2-of-3 vault with your phone, a key partner and a backup, no desktop required.
Unchained
Collaborative multisig custody, inheritance planning and bitcoin-backed loans — US-focused.
Quick answers
- What is Nunchuk?
- Nunchuk is a Bitcoin custody service. Multisig wallet software with collaborative custody and inheritance features — open-source clients.
- Is Nunchuk open source?
- Yes — Nunchuk publishes its source code.
- What category of service is Nunchuk?
- Nunchuk is listed under Custody in the SatsAtlas services directory.
Explore the rest of the stack: wallets, where to buy and places that take Bitcoin. Facts describe each service's core product and can change — always verify on the official site.