One address for mail,
money, and identity.
Encrypted email with a sealed-key wallet and cloud drive built in — the account that signs you into everything on Cube. Your keys never leave your device.
Recording saved to your Drive — Q3 standup
Q3 designs — fully encrypted attachment
Settlement complete: ₦2,450,000 → your wallet
Weekly digest (sent to your alias)
12,408.55 CUBE · 0x8f2a…c41d
Your wallet lives behind your address — keys sealed
Encrypted mail
Privacy isn't a feature. It's the default.
Everything you expect from modern email — composer, threads, contacts, attachments — built on zero-access encryption.
End-to-end encrypted
Every message is encrypted on your device before it leaves. Only you and your recipient hold the keys — not even Cube can read your mail.
Masks your private keys
Your address is a shield for your wallet. Keys are sealed in your device's secure enclave — Cubemail signs for you, and they never leave.
Sign in to onchain apps
Use your Cubemail address to sign in to any app on Cube — DEX, CubePay, Convene — without ever importing or exposing your keys.
Zero-access architecture
Mailbox contents are stored zero-knowledge. There is no master key, no backdoor, and nothing to hand over — your inbox is mathematically yours.
Aliases that protect you
Create unlimited aliases for sign-ups, marketplaces, and dApps. Your real address — and the identity behind it — stays hidden.
Encrypted everything
Attachments, contacts, subject lines, and metadata — encrypted by default. Open standards (PGP-compatible) so you're never locked in.
Your address has a balance.
Signing up mints an inbox and a wallet in one stroke. Hold CUBE and tokens, send and receive on Cube Chain, and watch CubePay settlements land — all from your account dashboard.
- Live balances and full transaction history on Cube Chain
- Send with password unlock — keys stay sealed in the vault
- One-time recovery code; rotate it or export any time
- Apps pay you by email address — no 0x copy-paste
Total balance
CUBE
Native coin
12,408.55
USDT
0x42aa…91be
3,120.00
convene-q3-standup.mp4
Recording · 24:13 · 312 MB
convene-design-review.webm
Recording · 41:02 · 540 MB
Q3-designs-final.pdf
Attachment · 8.2 MB
Cubemail Drive
Your cloud, behind your address.
Every Cubemail account ships with private cloud storage. Save Convene call recordings straight to it mid-meeting, keep attachments, and stream everything back on any device you're signed into.
Open your Drive- Convene recordings, one tap away"Save to Cubemail cloud" in a call lands the file here — play it from your dashboard.
- Files up to 2 GBLarge recordings stream with range support; downloads work in any browser tag.
- Yours aloneScoped to your account and served only with your token. No public buckets, ever.
Sign in once. Everything on Cube opens.
Cubemail is to Cube what your Google account is to Google. The same address runs your inbox, your wallet, your meetings and your payments — and signs you into every app with one tap.
Convene
Meetings, recordings, AI notes and booking pages — under your Cube account.
CubePay
Merchant payouts settle straight to your Cubemail wallet. SSO-only, passwordless.
Cube DEX
Trade with your identity proven by your address — no key imports.
Your app
Add the "Sign in with Cubemail" button with two script tags.
Security model
Your keys never travel. Ever.
Wallets ask you to paste seed phrases into browser extensions. Cubemail flips the model: the key stays in the vault, and the request travels to you instead.
- Vault-sealed keysGenerated at signup and sealed under your password. Not exportable without it — by design.
- Approval on every signatureEvery sign-in and transaction is approved by you, with your password unlocking the vault for minutes at a time.
- No seed phrase phishingThere is nothing to type, paste, or screenshot. The most common crypto attack simply has no surface.
- Open, auditable cryptographyPGP-compatible mail encryption and standard onchain signatures — verify everything yourself.
Sign-in flow
One button.
Every Cube user on your site.
Drop the Sign in with Cubemail button into any website — exactly like the Google button. You get a verified email and a wallet address, with zero keys to handle.
· Two script tags, any framework· Popup or redirect flow· Server-side verify endpoint
<!-- 1. load the SDK -->
<script src="https://cube.host/cubemail-signin.js" async></script>
<!-- 2. render the button -->
<div id="cubemailButton"></div>
<script>
cubemail.accounts.id.initialize({
callback: ({ credential, profile }) => {
// profile.email · profile.wallet_address
},
});
cubemail.accounts.id.renderButton(cubemailButton, { theme: 'outline' });
</script>FAQ
Questions, answered.
How does Cubemail mask my private keys?
Your keys are generated and sealed inside your device's secure vault. Cubemail acts as the public face of that identity: when an app needs a signature, you approve the request and the vault signs. The keys themselves never leave — and never touch Cubemail's servers in the clear.
Is the wallet a separate app?
No — your wallet is born with your address. Signup mints both at once, and your account dashboard shows balances, sends, receives, and full transaction history on Cube Chain. Apps like CubePay pay out straight to it.
What is Cubemail Drive?
Per-account cloud storage. Today it holds your Convene call recordings ("save to Cubemail cloud"); any Cube app can park files there, and you can stream or download them from any device you're signed into.
Can I really sign in to apps without importing keys?
Yes. Any app on Cube can show a "Sign in with Cubemail" button. Approving it links the session to your identity through your address — no seed phrases, no key imports, no browser extensions.
Can I email people who don't use Cubemail?
Of course. Mail to external addresses travels with TLS, and you can send fully end-to-end encrypted messages to anyone via password-protected mail or PGP.
What happens if I lose my device?
Your account is recoverable with your one-time recovery code — shown exactly once at signup and rotatable any time from your dashboard. Without it, nobody — including Cube — can open your inbox or wallet.
Your inbox. Your wallet.
Your keys — sealed.
Claim your encrypted address and get the one account that opens everything on Cube.