Kage

COINCUBE

Sovereign banking for everyone.

Pre-Seed · 2026
Seal
~$8.5B
lost in exchange & platform security incidents (2009–2024)

A. Not your keys, not your coins.

Exchanges fail, freeze, and vanish. Third-party custody puts every user one counterparty behind a single point of failure.

B. One key, a single point of failure.

The recent Coldcard compromise made it plain: leaving custody doesn't remove the single point of failure, it just moves it. One vendor, one device, one seed — one flaw away from zero.

C. Lost your keys, lost your coins.

Lose a seed phrase, lose everything. No recovery, no inheritance, no safety net.

Every failure above is the same failure: one key, one device, one custodian. We build so no single point can lose your money.

Crumbling Institution

Why Now?

Paper Bitcoin ≠ Bitcoin.
Bitcoin had its AOL moment — we know what came after AOL.

Preservation, not speculation.

In high-inflation markets, Bitcoin will be used to preserve wealth — but people still need to spend from savings. Lightning and instant stablecoin rails make that possible.

Smart vaults are here.

Taproot + Miniscript unlock inheritance, recovery, and policy controls on Bitcoin. The building blocks now exist.

Trust is broken.

Every layer you're asked to trust — the custodian, the vendor, the node — is a surface for capture. Demand for Bitcoin you hold and verify yourself is rising.

AI-powered development.

AI tools are unlocking 10× productivity. A lean team powered by Claude can build what once required a department.

Three pillars of
sovereign banking.

T1

Translate

Move value between fiat and Bitcoin without asking permission or suffering a proctology exam.

T2

Transact

Send, receive, and spend Bitcoin — and dollars — easily. On-chain, Lightning, Spark. It should just work.

T3

Transport

Move Bitcoin across space and time — securely, with inheritance, recovery, and policy controls built in.

天守 Tenshu
The desktop keep. Holds the Vault, Spark, and Marketplace.
Keychain
Your phone, turned into a signing device.
Connect
The backbone — backup, recovery, duress.
Active Cube
Translate

COINCUBE|TENSHU|Marketplace

In development · targeting Q1 2027
  • Buy/Sell via Meld globally and Mavapay in Nigeria — fiat on-ramp / off-ramp, transacted inside the app.
  • Voucher on-ramp — Azteco integration under evaluation: buy Bitcoin with a paper or digital voucher, no exchange account to open.

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. Held back from launch deliberately: we don't ship money movement until a rail is proven with real money.

Marketplace
Transact

COINCUBE|TENSHU|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.
  • Send dollars — pay USDT and USDC recipients across 30+ networks straight from your Bitcoin balance.
  • Get paid in dollars — accept USDT, USDC and 100+ other assets; it arrives as Bitcoin in your Spark wallet.
  • Stable Balance — hold dollars in-wallet earning 3.5–6%, ready to spend at any time.

One savings vault, one spending wallet. Spark powers daily payments — and quietly bridges saving and spending through its Stable Balance.

Spark Wallet
Transport

COINCUBE|TENSHU|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.

Vault
Transport

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.

Keychain
Transport

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 Legacy — 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 Legacy inheritance protocol.

Connect
Kage

Sovereign banking
for everyone.

Vault-grade security + inheritance + policy controls, paired with a daily Lightning wallet that spends Bitcoin and dollars anywhere — packaged for consumers.

Translate, Transact, and Transport value in a Bitcoin-native way. No PhD in cryptography required.

The market is growing.

If we offer self-custody with great UX and peace of mind, adoption follows.

365M
Global — Total Bitcoin Owners (2026)
Crypto.com estimate. Growing 15–20% annually.
~180M
Accessible — Smartphone + Desktop Access
Modeled SAM: TAM × computer access (~60%) × smartphone access (~82%).
~1–3M
Beachhead — Serious Savers Seeking Self-Custody
≈$1k+ BTC holders actively prioritizing self-custody off exchanges.

Dual-engine revenue.

ENGINE 1 · LIVE
Connect Subscriptions (Keychain + Vault + Legacy features)
Pro: policies + security + keychain — $8–15/mo
Legacy: inheritance + recovery — $20–50/mo
Business: org multi-sig + admin — $50–200/mo (in development · Q4 2027)
ENGINE 2 · Q1 2027
Transaction Revenue (Marketplace)
0.5–1.5% fee / spread per transaction. Primary wallet for savings + spending → transactions become habitual. Revenue scales with volume.

Revenue Examples

Pro subscriber → $96–$180 ARR
Legacy subscriber → $240–$600 ARR
$1,000 BTC buy → $10 revenue
$5,000/mo DCA user → $50/mo revenue

Traction & Roadmap

Tenshu, the desktop app, is built and shipping. Keychain mobile app launching with Pro and Legacy subscription tiers.

Q1–Q3 2026
Development ✓
Tenshu built & operational. Multi-sig architecture proven. Lightning integration tested.
Q4 2026
Public Launch
Tenshu live on desktop. Keychain on iOS & Android. Pro & Legacy subscriptions live. Spark Lightning + stablecoin payments.
Q4 2026 – Q1 2027
Pre-Seed Round
SAFE at $3M cap / 20% discount. Raising $500K — $300K minimum — to accelerate growth and expand the team.
Q1 2027
Marketplace
Marketplace ships — Buy/Sell via Meld, Azteco vouchers. 2–3K AMU · ~400 PMU · ~$50K ARR. Expand to LatAm & SE Asia.

Builders with
skin in the game.

Robert Allen

Founder & CEO

  • Early Bitcoin pioneer. Former NYC licensed stockbroker (Series 7 & 66).
  • Brokered precious metals under economist Peter Schiff.
  • Lead developer at Elpis Squared (2021–2024) — acquired by Itron Inc. for $35M.
  • Co-founded Satlantis.io in 2024, securing $1M+ in VC funding.

"We are building the product we needed for ourselves."

Founder

The Ask

SAFE Note

Simple, founder-friendly terms. Capital goes directly to building.

$3M
Valuation Cap
20%
Discount
$500K
Target Raise
$300K
Minimum to Close

Allocation

Growth 50%
Engineering 35%
Ops 15%

Round opens at a $300K minimum and closes at $500K — capital funds growth, not discovery, with the product already live.
Projected first-year revenue: $50K

Kage

Partner with us.

Engineer the infrastructure of sovereign banking.

Connect
Telegram, Nostr, X
@satoshisound
Website
coincube.io
Email
robert@coincube.io
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