Buy, secure, and pass on Bitcoin with confidence.
Self-custody that protects against loss, compromise, and human error so your Bitcoin outlasts you.
Three pillars. One standard: Bitcoin.
Send and receive Bitcoin INSTANTLY!
COINCUBE Liquid uses the Liquid Network for fast, low-fee Bitcoin transactions. No waiting for confirmations. No excessive fees. Just move your Bitcoin when you need to.
Learn about Liquid
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
Buy Bitcoin directly, no exchange required
Over-the-counter trading between parties. No order books, no exchange accounts, no KYC friction beyond what's legally required. Bitcoin arrives directly in your Vault.
Learn about the Marketplace
From zero to secure in minutes
Your Bitcoin journey in four steps.
Create your Cube
Set a PIN. Your Cube is your identity — it holds everything.
Set up your keys
Import hardware keys from Ledger, Coldcard, Jade, or BitBox. Choose your multi-sig configuration.
Fund your wallet
Buy through the Marketplace or receive from any Bitcoin address.
Your Bitcoin. Your rules.
Spend from Liquid, store in the Vault, trade on the Marketplace. 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.
Built on Bitcoin, open to audit
For those who want to see under the hood.
Ready to take custody?
Open source. Free forever.