Citadel Vault is an air‑gapped inheritance computer for serious Bitcoin holders.
The Vault backs up your hardware wallets and extends their effective life from roughly 10 years toward a 1,000 year horizon with durable, modular storage. It encrypts your instructions and legal documents, and its built in advisor gives your heirs a clear, non technical recovery path, with no subscriptions, custodians, KYC, or third party risk.
Between 3.7 million and 5 million Bitcoin (nearly a quarter of all Bitcoin ever mined) is permanently inaccessible. Not stolen. Not spent. Gone, because no one left behind a way to reach it.
Most of it didn't disappear due to carelessness. It disappeared because self-custody is genuinely hard, and there was no complete system for what happens when the keyholder dies, becomes incapacitated, or simply can't remember.
The threats aren't hypothetical:
Existing solutions weren't built for this.
Hardware wallets protect your Bitcoin while you're alive. They offer nothing for what comes after. Managed custody platforms require ongoing trust in a third party, monthly fees, and the assumption that the company will still exist and cooperate when your family needs access. DIY setups can work, but they demand sourcing the right components, executing complex technical procedures, and trusting that grieving family members can follow them correctly under pressure.
And none of it addresses your full digital life. Passwords, 2FA keys, encrypted drives, exchange accounts, digital IDs: your wealth extends far beyond a single seed phrase.
Without a complete system, your Bitcoin doesn't pass to your family. It vanishes.
Two years ago, we founded 21sats Inheritance Protocol to help Bitcoiners pass down their generational wealth securely and privately. Our offline protocol has been vetted by clients in dozens of jurisdictions worldwide. It works. But it required a 15-hour setup process, guided one-on-one by an advisor.
So we built CitadelVault: the world's first digital inheritance computer. A single device that compresses 15 hours of advisor-led work into a 45-minute automated wizard. It ships with everything your family needs. Nothing to source separately.
Built from experience. Not from theory.
We know exactly where people get stuck. We watched it happen, client after client, and we documented every failure point. CitadelVault is the hardware answer to everything we learned was broken. But it's not only hardware.
Every CitadelVault ships with the complete 21sats Inheritance Protocol: the same methodology refined through years of real client work. The hardware makes it accessible. The protocol makes it work.
One device. Nothing missing.
It's not a hardware wallet. It's not a subscription service. It's not a DIY guide. It's the digital inheritance computer that should have existed from the beginning.
You do the work once. Your family benefits forever.
CitadelVault arrives pre-configured and ready to use. Power it on and launch the step-by-step automated wizard. It guides you through a complete inventory of your digital assets: Bitcoin wallets, passwords, accounts, signing devices, and more. All 20 categories. Nothing gets missed. Expert support is available throughout. No technical background required.
CitadelVault generates encrypted offline backups of your secrets and stores them on a Vault Drive, using a sharded key across Vault Cards. The entire system (CitadelVault, Vault Drive, Vault Cards, and scanner) is compact enough to store in a standard safe or safe deposit box. Geographic dispersion is built into the protocol. Place your Vault Cards in separate locations: a safe, a safety deposit box, with your attorney, or with a trusted family member. No single location holds enough to access your assets alone. Your legal documents travel with them.
When the time comes, your heirs use CitadelVault and the distributed recovery cards to reconstruct your digital estate. The built-in recovery advisor guides every step. Our team is available throughout. No technical knowledge required. No guesswork. A clear, executable plan your heirs can follow on the worst day of their lives.
CitadelVault runs on a purpose-adapted handheld computer with Vault OS, a hardened, air-gapped operating system designed exclusively for secret management and inheritance planning. It has never connected to the internet. It never will.
Pre-sale: 10% off MSRP. Early Bird pricing: $2,395 (21% off) for the first 21 backers.
| Feature | Vault Core | Vault Pro | Unchained | Casa | Nunchuk |
|---|---|---|---|---|---|
| Pricing Model | ✓ One-time $2,995 | ✓ One-time $3,995 | $250–$6K/yr | $252–$2.1K/yr | $120–$480/yr |
| 40-Year Cost | ✓ $2,995 | ✓ $3,995 | $12K–$246K | $10K–$84K | $4.9K–$19.2K |
| Digital Assets | ✓ All | ✓ All | BTC only | BTC, ETH, USDT, USDC | BTC only |
| Wallets | ✓ Unlimited | ✓ Unlimited | 1 per plan | 1 per plan | 1 assisted |
| Server Dependency | ✓ Fully offline | ✓ Fully offline | Server-dependent | Server-dependent | Server-dependent |
| Self-Custody | ✓ 100% | ✓ 100% | They hold 1 key | They hold 1 key | They hold platform key |
| KYC Required | ✓ No KYC | ✓ No KYC | Full KYC | Full KYC | No KYC, but tracking SDK |
| Company Sees Balances | ✓ Never | ✓ Never | Yes | Yes | Yes |
| Inheritance | ✓ Shamir + legal docs | ✓ Shamir + legal docs | Extra fee | Premium ($2.1K/yr) | $480/yr plan |
| Hardware Security | ✓ SmartCard EAL6+ | ✓ SmartCard EAL6+ | Server-side HSM | Server HSM + enclave | Server key + TAPSIGNER |
| Legal Documents | ✓ 23 jurisdictions | ✓ 23 jurisdictions | U.S. only | None | None |
| Encryption | ✓ AES-256-GCM + Argon2id | ✓ AES-256-GCM + Argon2id | AES-256 (server-side) | Secure enclave + KMS | AES-128-CTR (TAPSIGNER) |
| Setup Time | ✓ 45 min + legal | ✓ 45 min + legal | Days-weeks (U.S. only) | 15 min (excl. legal) | 30-60 min (excl. legal) |
| Recovery | ✓ Tap 2 Vault Cards + PIN | ✓ Tap 3 Vault Cards + PIN | Contact support + ID | Contact support + ID | Self-recovery (manual) |
| Storage Lifespan | ✓ 100+ years | ✓ 1,000+ years | Server-dependent | Server-dependent | Server-dependent |
| Timelock | ✓ Offline Bitcoin timeproof | ✓ Offline Bitcoin timeproof | None | None | Smart contract (risk) |
| Recovery Scripts | ✓ Open source | ✓ Open source | Proprietary | Proprietary | Open source |
A managed custody service charges ~$250/year. In 12 years you'll have paid more than a Vault Core costs, and your plan disappears the moment you stop paying.
One purchase. Outlasts you by design.
The Citadel team is on the ground in Prague for the world's largest Bitcoin conference. Live demos, in-person Q&A, and the chance to hold the Vault in your hands before it ships.
All hardware units ship in the order pledges were received. Early Bird backers ship first.
21 units. No exceptions. First come, first protected.
The Vault Core at 21% off retail, reserved for the first 21 backers who move. When these are gone, they're gone. The next tier up is $301 more. Serialized unit number: your Vault ships as one of the original 21 with priority fulfillment.
You built something worth protecting. CitadelVault is the only system built to make sure it survives you.
For advanced 3 of 5 Vault Card security + 1000 year archiving.
The Vault Pro plus our white glove setup service.
Your clients are asking about Bitcoin inheritance. Now you have a complete answer. For advisors, family offices, or people working in the digital asset custody and inheritance sectors.
Highest level of security including YubiKey, biometrics, and unlimited shards. Includes a 7-day VIP trip to Lombok, Indonesia for white-glove setup with the founder, covering security, wallet setup, inheritance, and advanced topics.
Payment in Bitcoin only. Reach out before pledging: we want to know who holds unit #1.
For $100, you get your name on the Founders Wall, embedded permanently in every copy of Vault OS shipped worldwide. You'll receive a numbered Founding Supporter certificate and 24-hour early access to the pre-sale. The $100 applies as a full credit toward any CitadelVault package, with 5% off MSRP locked in for one year from purchase date. Not combinable with existing 21sats customer discounts. Limited to 100 supporters.
All hardware orders ship in pledge order. Early Bird first, then Core, Pro, Pro+, and premium tiers. We accept Bitcoin (on-chain & Lightning) and bank transfer, including SEPA.
Shipping & Tax Notice: Your payment covers the product and the outbound shipping shown on your quote. Import VAT, duties, and any carrier brokerage fees are billed to you directly by the carrier on delivery (DAP, Incoterms 2020) and are not collected by Citadel Vault. See the Terms of Sale and Shipping Policy for details.
CitadelVault didn't come from a hackathon or a whitepaper. It came from years of working with real clients, seeing every way an inheritance plan can fail.
We are a core team of six, backed by a network of specialized builders, united by a single conviction: Bitcoin is generational wealth, and most of the infrastructure to protect it doesn't exist yet. Our founders bring decades of hardware and software experience from Apple and Silicon Valley, alongside a track record of building and scaling venture-backed startups.
Craig
FounderCraig founded CitadelVault on a simple but radical idea: your Bitcoin should outlive you, and your heirs shouldn't need a computer science degree to claim it.
Daniel
Co-Founder & COO USA OperationsDaniel keeps CitadelVault running with the calm focus of a dog guarding a bone the size of a block reward.
Alex
COO CanadaAlex keeps CitadelVault Canada humming with the steady patience of a dog waiting for sats-per-loonie to finally moon.
Here's exactly what happens, from the moment the pre-sale opens to the moment your Vault ships.
CitadelVault is available for pre-order at citadelvault.org. All tiers available. Early Bird units (21 only) open now. First come, first protected.
The Citadel team is on the ground in Prague for the world's largest Bitcoin conference. Live demos, in-person Q&A, and the chance to see the Vault in your hands before it ships. Find us there →
Final tally. All orders locked in. Production begins immediately.
Each unit is assembled, tested, and flashed with Vault OS. Early Bird backers move to the front of the line.
The first 21 serialized units go out the door. Early Bird backers receive shipping confirmation and tracking.
All remaining hardware orders fulfilled. Consultation scheduling begins for Pro+ and Vault Advisor backers.
Additional production run ships to late pre-sale buyers and replacements.
Final fulfillment wave and contingency replacements complete.
Every date above is a commitment, not an estimate. If anything changes, backers hear from us first.
| Feature | Vault Core | Vault Pro |
|---|---|---|
| Core Hardware | ||
| CitadelVault Computer | ✦ | ✦ |
| Vault OS | ✦ | ✦ |
| QR Scanner | ✦ | ✦ |
| NFC Card Reader | ✦ | ✦ |
| Expansion Card | — | ✦ |
| Recovery Configuration | ||
| Vault Cards | 3 Cards | 5 Cards |
| Shamir Recovery Scheme | 2-of-3 | Up to 3-of-5 |
| Geographic Distribution Points | 3 locations | Up to 5 locations |
| Storage | ||
| Vault Drive (encrypted primary storage) | ✦ | ✦ |
| Millennial Drive (1,000-year archival) | — | ✦ |
| TimeLock | ||
| TimeLock SD | ✦ | ✦ |
| Programmable Timelocks | 1 included | 3 included |
| Inheritance Tools | ||
| Legal Document Engine | ✦ | ✦ |
| Heir Recovery Guide | ✦ | ✦ |
| Protection & Transport | ||
| NFC-Blocking Vault Card Sleeves | — | ✦ |
| Pelican-Style Carrying Case | — | ✦ |
| Support | ||
| Standard Support (chat & email) | ✦ | ✦ |
| Priority Support & Extended Warranty | Optional – $299 one-time | Optional – $399 one-time |
| Best For | ||
| Ideal Setup | Single household or couple. 3-location distribution plan. | Multi-generational families. 5-location distribution. Complex estates. |
| Tier | Pre-Sale Price | Retail Price | You Save |
|---|---|---|---|
| Vault Early Bird ONLY 21 UNITS | $2,395 | $2,995 | 21% off |
| Vault Core | $2,995 | $3,325 | 10% off |
| Vault Pro | $3,995 | $4,813 | 17% off |
| Vault Pro+ | $4,995 | $5,876 | 15% off |
| Vault Advisor | $9,995 | $11,105 | 10% off |
Why 21 Early Bird units? You know why. When they're gone, the price goes up. Permanently.
| Batch | Tiers | Ships |
|---|---|---|
| 1: Priority | Vault Early Bird | Aug 31, 2026 |
| 2: Standard | Vault Core, Pro, Pro+ | Sep 2026 |
| 3: Pro+ Setup | Vault Advisor, Founders Edition | Coordinated directly |
Full fulfillment target: September 2026. Advisor and Founders Edition backers will be contacted directly to coordinate delivery.