BTC 🇺🇸 $64,940.00 •  🇪🇺 €56,648.00 •  🇳🇬 NGN 89,430,735 •  🇨🇦 CA$91,168.00 •  🇦🇺 A$92,674.00 •  🇯🇵 ¥10,533,323 •  🇨🇭 CHF 52,297.00 BTC 🇺🇸 $64,940.00 •  🇪🇺 €56,648.00 •  🇳🇬 NGN 89,430,735 •  🇨🇦 CA$91,168.00 •  🇦🇺 A$92,674.00 •  🇯🇵 ¥10,533,323 •  🇨🇭 CHF 52,297.00
COINCUBE | Tenshu

The Keep

A tenshu is a castle's keep, the stronghold at its heart, the last tower standing when everything outside has fallen. It's also the COINCUBE desktop app: one home for your Bitcoin, from long-term savings to everyday spending.

COINCUBE Tenshu, the sumi-e castle keep

Savings and spending, in one app

Vault is your savings account, with inheritance built into the wallet. Spark is your checking account: the money you actually spend, day to day.

Kage, COINCUBE Guardian

Vault

Your savings account

Your savings, with inheritance built into the wallet. Multi-key cold storage and time-locked recovery. Lose a key and your Bitcoin isn't lost; a key is compromised and it isn't stolen.

Learn about Vault
Kage, COINCUBE Guardian

Spark

Your checking account

The money you spend day to day. Instant Lightning payments, your own @coincube.io Lightning Address that receives even while you're offline, and a Stable Balance that holds its dollar value.

Learn about Spark

Secured across places and people

Your Vault is multisig: keys held across your devices, your locations, and the people you trust. No single key can lose your Bitcoin or give it away, and recovery and inheritance are built in and just as distributed.

Run your own node

Validate against your own chain: install a pruned Bitcoin Knots node in-app, or point Tenshu at your own Esplora endpoint. Your rules, verified.

Cube Recovery Kit

A guided backup of your keys and wallet configuration. Keep it offline yourself, or store an encrypted copy through Connect: a hosted safety net that only you can decrypt.

Duress mode

Unlock to a state where your device holds nothing. Nothing to show, nothing to hand over. The coins simply aren't reachable from what's in your hand.

Kage, COINCUBE Guardian

Your keyholders carry Keychain

A Vault can be held by more than one person. The people who hold keys for you (a partner, an heir, a trusted friend in another city) carry Keychain on their phones. It turns a phone into a signing device, so your multisig quorum and inheritance keys live where the people you trust already are.

Meet Keychain
Kage, COINCUBE Guardian

Launching soon

Self-sovereign Bitcoin. Be first in line.