Four pillars of
sovereign banking.

COINCUBE | Marketplace

• KYC option via Meld/Mavapay — direct fiat on-ramp / off-ramp, transact within the app.
• P2P option via Mostro protocol — buy/sell directly with peers, decentralized and secure.

Bitcoin is permissionless money. You shouldn't need permission to buy or sell it. The Marketplace eliminates the friction of moving funds between unsafe exchanges and complex wallets — it's all under one roof.

COINCUBE | Liquid

• Multi-asset wallet on the Liquid Network — hold and send L-BTC, USDT, and other Liquid assets.
• Stable-dollar payments without leaving Bitcoin rails — USDT for the dollar-denominated world.
• Instant, near-zero-fee settlement with confidential transaction amounts.
• Pay merchants or send to friends globally without touching deep cold storage.

The Liquid wallet is your multi-currency daily driver — Bitcoin when you want sound money, USDT when you want dollar stability, all under self-custody.

COINCUBE | Spark

• Lightning Network — sub-cent fees, instant settlement, anywhere in the world.
• Lightning Address — give out you@coincube.io like an email address. Anyone can pay you, instantly.
• BOLT11 & LNURL-pay — full compatibility with the Lightning ecosystem.
• Single setup, instant access — Spark and Liquid share one signer for your daily wallets. Vault stays isolated under its own multi-sig policy.

Spark powers daily payments — and quietly bridges to the Grow pillar through its Stable Balance feature.

COINCUBE | Stable Balance

• Toggle Stable Balance inside Spark — incoming sats auto-convert to USDB internally.
• One balance, shown in USD. Yield accrues passively while you hold.
• Self-custodial throughout — no banks, no custodians, no permission slips.
• Convert back to BTC at any time. Spend it through the same Spark wallet.

The first true sovereign savings account — dollar-denominated yield without surrendering custody.

COINCUBE | Vault

• Advanced multi-sig Bitcoin wallet using Taproot and Miniscript.
• Create additional spend paths for inheritance and recovery.
• Time-lock funds for forced hold and security. (Coming Soon)

The Vault offers smart custody — manage wealth securely with inheritance recovery and time-locked savings. Peace of mind for the future.

COINCUBE | Connect

• Easily back up your wallet descriptor with our Connect service.
• Run your own Bitcoin node — or use our Esplora service free with Connect.
• Enable Duress Mode — have a wrench attack plan already in place.
• Powers Estate — our inheritance and recovery protocol. Connect is the backbone that makes time-locked recovery and family key onboarding possible.

Our Connect service is the layer that lifts the Vault into a new class of self-custodial wallets — providing backup, node access, duress protection, and the infrastructure behind our Estate inheritance protocol.

COINCUBE | Keychain

• Turn any phone into a Bitcoin signing device.
• Easily onboard family and friends for inheritance and social recovery.
• Works seamlessly with the Vault.

Our companion mobile app acts as your dedicated signing device — simple inheritance, strong security, fewer hardware devices.

Builders with
skin in the game.