Nunchuk
Nunchuk is a Bitcoin-only collaborative self-custody platform offering multisig wallets, on-chain timelock inheritance, and AI-agent tools, sold via annual subscriptions to individual holders, families, advisors, and developers globally.
- Company typePrivate
- Founded2020
- HeadquartersCalifornia, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingSoftware
What Nunchuk does
Nunchuk is a Bitcoin-only collaborative self-custody platform founded in 2020 that builds multisig wallets with advanced programmability. The core product is a mobile and desktop wallet (iOS, Android, macOS, Windows, Linux) that supports Native SegWit, Taproot, MuSig2, and the first significant mobile implementation of Miniscript. Differentiated features include NFC-capable cold storage (via TAPSIGNER), air-gapped QR and SD-card signing, flexible spending policies with co-signing delays, emergency lockdown, and an on-chain timelock inheritance system designed to execute autonomously even if the company ceases to operate. The platform integrates with the major hardware wallets (COLDCARD, Blockstream Jade, Ledger, Trezor, SeedSigner, BitBox02, Foundation Passport, Keystone, TwentyTwo) and exports BSMS descriptors compatible with Sparrow and Bitcoin Core for recovery.
Nunchuk monetizes entirely through annual subscriptions across four product lines: individuals (Iron Hand $120, Honey Badger $480, Honey Badger Premier $2,100), families and groups (Finney Standard $250 and Finney Pro $750 per wallet), advisors (Byzantine), and developers (open-source Nunchuk CLI and Agent Skills under MIT license). A free tier supports DIY single-sig and multisig users. Distribution is digital-first via app stores and GitHub, with no KYC and global availability. The company operates as a fully remote team of 11-50 and has secured over $1B in Bitcoin since launch. Its non-custodial architecture was publicly validated in 2022 when it refused a Mareva injunction from the Ontario Superior Court of Justice, cementing a regulatory and brand moat centered on financial sovereignty.
Nunchuk firmographics
Firmographics- Name
- Nunchuk
- Legal name
- Nunchuk Inc.
- Website
- https://nunchuk.io
- Company type
- Private
- Founded year
- 2020
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Nunchuk is a Bitcoin-only collaborative self-custody platform offering multisig wallets, on-chain timelock inheritance, and AI-agent tools, sold via annual subscriptions to individual holders, families, advisors, and developers globally.
- Ownership category
- akta.pro rank
Nunchuk industry classification
Industry- Product category
- Bitcoin Self-Custody Wallet Software
- NAICS
- Trust, Fiduciary, and Custody Activities (523991)
- akta.pro primary industry
- Self-Custody Wallets (Consumer & Institutional) (FSADACAE)
- akta.pro secondary industries
- Self-Custody Wallets (EOA, seed phrase, HD wallets) (FSAPACAA), Authorization & Permissions (delegation, allowances, capability-based access, session keys) (FSAPACAJ), Custody Technology Platforms (Custody-as-a-Service) (FSADACAB)
Keywords
Where Nunchuk is headquartered
LocationHeadquarters
- HQ city
- California
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Nunchuk business model
Business model- GTM type
- B2B and B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales
Revenue model
- Subscription Plans: Annual subscription revenue from tiered plans: Free (DIY), Iron Hand $120/yr (2-of-3 multisig), Honey Badger $480/yr (2x 2-of-4 wallets with inheritance), Honey Badger Premier $2100/yr (3x 3-of-5 wallets with enhanced inheritance). Additional wallets available as add-ons.
- Finney Plans for Families/Groups: Annual subscription revenue from collaborative custody plans for families and groups: Finney Standard $250/wallet/yr (2-of-3), Finney Pro $750/wallet/yr (3-of-5).
- Byzantine Advisor Plans: Annual subscription plans for Bitcoin advisors helping clients secure bitcoin. Includes multi-user multisig, collaborative transactions, group chat, and timelocked inheritance planning features.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Annual | Free tier - DIY single-sig and multisig wallets |
| Subscription | Annual | Iron Hand - Starter pack with 2-of-3 assisted multisig |
| Subscription | Annual | Honey Badger - Flagship inheritance package |
| Subscription | Annual | Honey Badger Premier - Ultimate security with 3-of-5 wallets |
| Subscription | Annual | Finney Standard - Multi-user collaborative custody for families |
| Subscription | Annual | Finney Pro - Enhanced multi-user collaborative custody |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels7 records
Nunchuk product offering
Product offeringCore offering
Nunchuk builds and sells a Bitcoin-only multisig self-custody wallet platform available on iOS, Android, Mac, Windows, and Linux. Its core product is a collaborative custody wallet supporting Miniscript, Native Segwit, and Taproot, with NFC-capable cold storage integration and a range of subscription plans that include assisted multisig, on-chain timelock inheritance, multi-user collaborative custody, and AI-agent tooling. The platform is monetized via tiered annual subscriptions (Free, Iron Hand $120/yr, Honey Badger $480/yr, Honey Badger Premier $2,100/yr, Finney Standard $250/wallet/yr, Finney Pro $750/wallet/yr, and Byzantine advisor plans), plus free open-source developer tools (Nunchuk CLI, Agent Skills) and a public API.
Product overview
Nunchuk is a Bitcoin-only multisig custody platform with multiple subscription tiers. The core product is the Nunchuk Bitcoin wallet—a mobile multisig solution with NFC-capable cold storage, hardware signing device support, and collaborative custody features. For individuals, plans range from free single-sig/multisig DIY wallets to Iron Hand ($120/year), Honey Badger ($480/year), and Honey Badger Premier ($2100/year)—with inheritance planning as the flagship feature. For families and groups, Finney STANDARD ($250/wallet/year) and Finney PRO ($750/wallet/year) provide collaborative multi-user multisig wallets. For advisors, Byzantine offers collaborative custody tools with inheritance planning capabilities. Developer offerings include Nunchuk CLI (open-source command-line tool) and Agent Skills for AI agent integrations with bounded authority. The platform supports two inheritance protocols: autonomous on-chain (via Miniscript and timelocks) and flexible off-chain. Key features include Emergency Lockdown, Flexible Spending Policies, Phased Rollout for multi-beneficiary inheritance, Taproot Multisig, and HSM mode for agent wallets.
Differentiator
Problem solved
Functional benefit
Brands
- Finney: Multi-user collaborative custody wallet for families and groups, offering 2-of-3 and 3-of-5 multisig configurations with collaboration tools.
- Byzantine
- Nunchuk CLI
- Agent Skills for Nunchuk CLI
Products and services
- Nunchuk Wallet (Individual Self-Custody Plans) Bitcoin-only multisig wallet for individual Bitcoin holders with tiered subscription plans: Free (DIY single-sig/multisig), Iron Hand ($120/yr, 2-of-3 assisted multisig with hardware support, key health checks, cloud backups, assisted recovery, emergency lockdown), Honey Badger ($480/yr, two 2-of-4 wallets with private inheritance planning and dedicated inheritance key), and Honey Badger Premier ($2,100/yr, three 3-of-5 wallets with two inheritance keys, multi-person wallet, roles and access control). Includes both autonomous on-chain timelock and flexible off-chain recovery options.
- Finney (Family & Group Collaborative Custody) Multi-user collaborative custody wallet for families and groups. Finney Standard ($250/wallet/yr) provides 2-of-3 multi-user multisig with distributed setup, multi-device sync, collaborative transactions, collaborative coin control, roles and access control, key health checks, private group chat, and hardware support. Finney Pro ($750/wallet/yr) adds 3-of-5 multisig configuration with all Standard features. Supports configurations such as One Person One Key, Majority Owner, and Blind Co-Signer.
- Byzantine (Bitcoin Advisor Program)
Quantifiable outcome
- Secures over $1 billion in Bitcoin
- +2 more outcomes
Companies that use Nunchuk
Customer profileNamed customers2 records
Segments4 records
Ideal customer profiles4 records
Nunchuk technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration12 records
AI capability2 records
Feature8 records
Nunchuk partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core.
- CoinkitecoreCoinkite is a strategic hardware partner providing TAPSIGNER and COLDCARD products. Nunchuk offers 10% discount on Coinkite products for subscribers. COLDCARD is supported as inheritance key hardware option. TAPSIGNER is the primary NFC-capable cold storage device integrated with Nunchuk.
- BlockstreamcoreBlockstream is a strategic hardware partner providing BlockStream Jade hardware wallet. Nunchuk offers 15% discount on BlockStream Jade for subscribers. BlockStream Jade is supported as a signing device for Nunchuk wallets.
- TwentyTwocoreTwentyTwo is a strategic hardware partner providing Portal hardware wallet. Nunchuk offers 15% discount on Portal by TwentyTwo for subscribers. TwentyTwo Portal is supported as a signing device for Nunchuk wallets.
- LedgercoreLedger is a hardware partner providing Ledger devices supported by Nunchuk. Compatible with Iron Hand, Honey Badger, and Honey Badger Premier plans.
- TrezorcoreTrezor is a hardware partner providing Trezor hardware wallets supported by Nunchuk wallets.
- SeedSignercoreSeedSigner is a hardware partner providing open-source DIY hardware signer supported by Nunchuk.
- BitBox02 (Shift Cryptosecurity)coreBitBox02 is a hardware partner providing BitBox02 hardware wallet supported by Nunchuk.
- Foundation DevicescoreFoundation Devices is a hardware partner providing Passport hardware wallet supported by Nunchuk.
- KeystonecoreKeystone is a hardware partner providing Keystone hardware wallet supported by Nunchuk.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
Nunchuk competitors and assessment
Company assessmentDirect peers
- Sparrow Wallet: Sparrow is a desktop Bitcoin wallet with strong multisig, hardware signing, and Miniscript support. Nunchuk explicitly supports BSMS export to Sparrow, indicating deep technical overlap on power-user multisig workflows.
- Casa: Casa offers Bitcoin self-custody with multi-key (multisig) vaults and inheritance planning for individuals and families. Most directly comparable to Nunchuk on collaborative custody and estate planning for Bitcoin holders.
- BlueWallet: BlueWallet is a popular mobile Bitcoin wallet with multisig and Lightning support. Comparable on mobile-first self-custody for individual Bitcoin holders, though with less inheritance focus.
- Bitcoin Keeper: Bitcoin Keeper is a mobile multisig wallet focused on collaborative custody and key management. Overlaps with Nunchuk on multi-user multisig and assisted workflows for families.
- Unchained Capital: Unchained provides collaborative Bitcoin custody with multisig vaults and inheritance/estate planning services for HNW holders and advisors. Closest direct competitor on the Byzantine advisor use case.
Broad incumbents
- Anchorage Digital: Anchorage is a federally chartered institutional crypto custodian offering Bitcoin custody at scale. Comparable on custody services for HNW and institutional clients but takes a custodial rather than self-custody approach.
- Ledger: Ledger is the dominant consumer hardware wallet maker with a broad multi-asset software stack (Ledger Live). A strategic partner of Nunchuk but also a potential broad incumbent competitor in assisted custody.
- Trezor: Trezor is a leading hardware wallet maker with multi-asset support and a software suite. Comparable as a hardware signing partner and broad incumbent in self-custody.
- Blockstream: Blockstream operates Bitcoin infrastructure (Jade hardware, Liquid network) and competes broadly across Bitcoin custody and Lightning. A strategic partner via Jade but a broader Bitcoin ecosystem incumbent.
Others
- Coinkite: Coinkite manufactures COLDCARD and TAPSIGNER hardware signing devices — the closest hardware ecosystem partner to Nunchuk. Also an indirect peer since their hardware is central to Nunchuk's assisted multisig and NFC workflows.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Nunchuk social profiles
Digital presenceNunchuk financial estimates
Financial estimateRevenue estimate
Valuation estimate
Nunchuk leadership team
Management profileNumber of profiles
Profiles1 record
Nunchuk funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Nunchuk M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Nunchuk
What does Nunchuk do?
Nunchuk builds and sells a Bitcoin-only multisig self-custody wallet platform available on iOS, Android, Mac, Windows, and Linux. Its core product is a collaborative custody wallet supporting Miniscript, Native Segwit, and Taproot, with NFC-capable cold storage integration and a range of subscription plans that include assisted multisig, on-chain timelock inheritance, multi-user collaborative custody, and AI-agent tooling. The platform is monetized via tiered annual subscriptions (Free, Iron Hand $120/yr, Honey Badger $480/yr, Honey Badger Premier $2,100/yr, Finney Standard $250/wallet/yr, Finney Pro $750/wallet/yr, and Byzantine advisor plans), plus free open-source developer tools (Nunchuk CLI, Agent Skills) and a public API.
Is Nunchuk a public or private company?
Nunchuk is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Nunchuk founded?
Nunchuk was founded in 2020. It employs 11 to 50 people.
Where is Nunchuk based?
Nunchuk is headquartered in California, United States, in the North America region.
How does Nunchuk make money?
Three revenue lines are on record. Subscription Plans are the primary driver. The others are finney Plans for Families/Groups and byzantine Advisor Plans.
Who are Nunchuk's main competitors?
Direct peers on record are Sparrow Wallet, Casa, BlueWallet, Bitcoin Keeper and Unchained Capital. Broad incumbents are Anchorage Digital, Ledger, Trezor and Blockstream. Coinkite is listed as an others.
Does Nunchuk have an API?
Yes. Nunchuk offers a public API accessible via the developer portal at developer.nunchuk.io. The API enables developers to integrate with Nunchuk wallets, policies, and transactions. Authentication is done via API keys. The platform supports both mainnet and sandbox/testnet environments. Developers can use the Nunchuk CLI (Node.js/JavaScript) or Agent Skills repository to interact with the API. Key capabilities include wallet creation, transaction handling, policy configuration, spending limits, signing delays, and BSMS export/recovery. Developer documentation is at developer.nunchuk.io.
What industry is Nunchuk in?
Nunchuk's product category is Bitcoin Self-Custody Wallet Software. Its primary akta.pro industry code is FSADACAE, Self-Custody Wallets (Consumer & Institutional), with a secondary code of FSAPACAA, Self-Custody Wallets (EOA, seed phrase, HD wallets). Its NAICS code is 523991.