BTC 🇺🇸 $61,803.00 •  🇪🇺 €54,057.00 •  🇳🇬 NGN 84,784,798 •  🇨🇦 CA$87,650.00 •  🇦🇺 A$89,304.00 •  🇯🇵 ¥9,954,733 •  🇨🇭 CHF 49,666.00 BTC 🇺🇸 $61,803.00 •  🇪🇺 €54,057.00 •  🇳🇬 NGN 84,784,798 •  🇨🇦 CA$87,650.00 •  🇦🇺 A$89,304.00 •  🇯🇵 ¥9,954,733 •  🇨🇭 CHF 49,666.00
COINCUBE

Buy, secure, and pass on Bitcoin with confidence.

Self-custody that protects against loss, compromise, and human error so your Bitcoin outlasts you.

Kage — COINCUBE Guardian

Three pillars. One standard: Bitcoin.

Send and receive Bitcoin INSTANTLY!

COINCUBE Spark is the everyday Lightning wallet: instant payments, your own @coincube.io Lightning Address that receives even while you're offline, and a Stable Balance that holds its dollar value. Self-custodial, always.

Learn about Spark
Kage — COINCUBE Guardian

Protect your Bitcoin against everything

Multi-key cold storage with time-locked recovery. Even if you lose a key, your Bitcoin isn't lost. Even if a key is compromised, your Bitcoin isn't stolen. And when the time comes, your Bitcoin passes on without a third party.

Learn about the Vault
Kage — COINCUBE Guardian

Sign from your phone, anywhere

COINCUBE Keychain turns your phone into a secure signing device for your Vault. Add remote, geographically-resilient keys and designate inheritance keys — sovereignty that fits in your pocket.

Learn about Keychain
Kage — COINCUBE Guardian

From zero to secure in minutes

Your Bitcoin journey in four steps.

Kage — COINCUBE Guardian
01

Create your Cube

Set a PIN. Your Cube is your identity — it holds everything.

Kage — COINCUBE Guardian
02

Set up your keys

Import hardware keys from Ledger, Coldcard, Jade, or BitBox. Choose your multi-sig configuration.

Kage — COINCUBE Guardian
03

Fund your wallet

Receive Bitcoin from any address, or transfer from an existing wallet.

Kage — COINCUBE Guardian
04

Command Your Bitcoin

Spend from Spark, secure it in the Vault, sign from your Keychain. One Cube, complete sovereignty.

Security without compromise

Your keys never leave your device. Hardware wallets keep them offline. Math enforces the rules.

No single point of failure

Multiple keys spread across devices and locations. Losing one key doesn't mean losing your Bitcoin.

Time-locked recovery

If a key is lost, a secure backup path activates after a set time. No custodians, no third parties.

Inheritance by design

Your Bitcoin passes on to the right people, at the right time, without lawyers or intermediaries.

Open source

Every line of code is auditable. Trust is verified, not assumed.

Kage — COINCUBE Guardian

Built on Bitcoin, open to audit

For those who want to see under the hood.

Kage — COINCUBE Guardian

Launching soon

Self-sovereign Bitcoin. Be first in line.