Crypto Inheritance · Self-Custody
Your Seed Phrase Shouldn't Die With You
Self-custody means nobody can recover your crypto if something happens to you — unless you plan for it. Killswitch keeps your seed phrases and wallet instructions Sealed and zero-knowledge until you stop checking in, then delivers them automatically to the people you choose.
What happens to crypto when the holder dies?
With self-custody, there's no bank to call and no "forgot my password" flow — the private key (or seed phrase) is the asset. If nobody else knows it, or knows how to use it, the funds are gone permanently. Exchanges with next-of-kin processes don't help if your holdings are in a hardware wallet or a self-custodied address.
A crypto inheritance plan solves this without exposing your seed phrase while you're alive: you store the recovery details Sealed and encrypted, and they're only ever delivered if you miss your scheduled check-ins.
How Killswitch handles crypto inheritance
- Store your recovery details Sealed. Seed phrases, wallet locations, hardware wallet PINs, and step-by-step recovery instructions are encrypted in your browser before they ever reach our servers. Sealed items are zero-knowledge — not even we can read them.
- Choose your heirs. Add each beneficiary's email. No Killswitch account is required on their end to receive what you leave them.
- Set a check-in cadence that fits you. Daily, weekly, or monthly — you pick how often we confirm you're still around.
- Miss a check-in, get reminders first. Multiple reminders go out across days before anything fires, so a vacation or a dead phone doesn't trigger delivery.
- Switch fires — recovery details are delivered. Once the switch fires, a unique key generated for that share — protected by our server-side vault — is unwrapped and used to deliver the recovery details to your chosen heir.
Sealed zero-knowledge storage
While you're checking in, your seed phrases and wallet instructions are Sealed: encrypted with a key that never leaves your device. We cannot read them, and neither can anyone who breaches our database.
No account needed for heirs
Your heirs don't need to sign up for anything or manage their own encryption keys. They get a secure delivery with exactly what you assigned them — nothing more to set up.
Always-fires guarantee
Once your switch is set up, it fires on schedule even if your subscription lapses. Your crypto inheritance plan doesn't depend on an active payment method to work when it matters.
Split across multiple heirs
Different wallets, exchanges, or hardware devices can go to different people. One switch, separate deliveries — no single person needs the whole picture.
Run a test fire first
Run a test fire first — verify exactly what your beneficiaries will receive, before the switch ever goes live.
Isn't storing a seed phrase online risky?
Storing a seed phrase in plaintext anywhere is risky. Killswitch never stores it in plaintext. It's Sealed in your browser before upload, so what reaches our servers is unreadable ciphertext. When you assign it to a beneficiary, delivery uses a unique key generated for that share and protected by our server-side vault — unwrapped and delivered only if you stop checking in. You can revoke any individual share at any time, with no effect on your other beneficiaries.
Read the full guide to crypto inheritance →Don't let your crypto die with you
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