Sui Overflow 2026 · DeFi & Payments

No seed phrase.
No gas.
Just pay.

Tap your phone or scan a QR to pay in stablecoins — charged the exact amount, no gas, no card fees, settled on Sui in under a second. No app? Scan and pay right in the browser. Your idle dollars earn yield while you spend, and every merchant gets on-chain gift cards out of the box.

Android APK · installs in seconds via Firebase App Distribution

$0 gas 0% user fees <1s settlement
$0.00gas, every tap
0%fees on payments
<1son-chain settlement
~11×the avg bank APY on Save
Any phonetap or scan to pay
Watch the demo

See Brisk in action.

A full walkthrough — tap to pay, idle dollars earning in Save, and a merchant collecting with payment links and on-chain gift cards, all on Sui.

Trouble loading? Watch on YouTube ↗

Tap or scan to pay

As easy as Apple Pay, on open rails.

Hold your phone near the Brisk Terminal, or scan the merchant's QR — pay in USDC, no gas, the exact amount. It works on any phone, and the merchant is paid instantly. No Brisk app? Scan the QR and pay right in your browser.

  • Phone-to-terminal NFC, or a QR anyone can scan
  • No app needed — pay in the browser with Google sign-in
  • Charged exactly the amount — never a cent more
  • On-chain receipt minted, zero gas
$18.00 ✓ Paid
Feeless by design

You pay the exact amount. Brisk never takes a cut.

Card networks skim 2–3% off every sale and settle in days. Brisk rides Sui's protocol-level gasless stablecoin transfers, so payments cost $0.00 in gas and there are no fees on regular payments — for the customer or the merchant.

  • Protocol-level gasless USDC — not a relayer trick
  • Sponsored receipts via Enoki, paid by Brisk
  • Money moves even if the receipt leg is skipped
Brisk
0%
Card networks
2–3%

Fees taken on every sale

Save

Idle dollars earn — spend straight from it anytime.

Move spare USDC to Save and earn APY — significant more than the US national savings average. Your principal stays instantly spendable and is always redeemable.

  • One tap to activate, no lock-ups
  • Yield compounds every second
  • Withdraw all, anytime

Save balance

$420.42

+$0.42 earned · growing every second

5.00%

APY

+$0.06

/ day

+$21

/ year

Your keys, your money

Self-custodial from a Google sign-in.

No seed phrase, no bank, no middleman. Brisk uses zkLogin so a wallet feels like a normal app — sign in with Google, authorize with biometrics, and you're the only one who controls the funds.

  • zkLogin accounts — no seed phrase to lose
  • Biometric signing via Passkey
  • Non-custodial: keys never leave your device
Brisk

Welcome to Brisk

No seed phrase, no gas. Just pay.

Self-custodial · your keys, your money

Merchant Pro

A full point-of-sale, free for any merchant.

Flip to Pro and Brisk becomes a business: charge by tap or payment link, collect into receiving accounts that sweep to a private treasury, and sell on-chain gift cards customers can buy, share, claim and re-gift — all gasless.

  • Payment links with expiry & QR — collect remotely
  • Receiving accounts (tills) → private treasury sweep
  • On-chain gift cards, paid to you instantly (3% fee)

Pay

$18.00

to Acme Coffee

Scan to pay · waiting for payment…

How it works

Built on what changed on Sui in 2026.

Two new primitives make a genuinely better payment experience possible — Brisk puts them together into "tap, pay, done."

📱Customer phonezkLogin + Passkey
Tap / linkNFC or QR
Suigasless USDC
🏪Merchant tillinstant payout
🏦Treasuryprivate sweep

Protocol-level gasless transfers

Supported stablecoins move peer-to-peer for $0.00 via Sui's new Address Balances architecture (launched May 2026). The sender doesn't need any SUI for gas — it's built into the protocol, not a relayer trick.

🔐

zkLogin + Passkey + Enoki

Self-custodial accounts from a Google sign-in, biometric signing, and Enoki gas sponsorship — so a wallet feels like a normal app, with no seed phrase and no pop-ups.

🧾

Two-leg payments

Leg one settles the money via native gasless send_funds — the source of truth. Leg two best-effort sponsors record_payment, minting an on-chain Receipt. If leg two is skipped, the money already moved.

📦

Move primitives

A small set of on-chain modules: spending_vault (Save), merchant_registry (identity & tills), and payment_receipt (receipts & records) — composable, auditable, open.

📈

Yield-bearing Save

Save is a cToken/share money market: deposits accrue a compounding exchange rate, principal stays redeemable, and yield is supplied through a blue-chip lender (a mock market on testnet).

🎁

Closed-loop gift cards

Merchants are paid the full sale (minus a 3% fee) the moment a gift card is bought. Recipients later redeem credit toward purchases — buyable, shareable, claimable and re-giftable, all gasless.

Tech stack

Open rails, native app feel.

Sui Move USDC Enoki zkLogin Passkey React Native Expo Reanimated NFC / HCE

Tap. Pay. Done.

A decentralized tap-to-pay point-of-sale on Sui — feeless to the customer, instant to the merchant, and your idle dollars earn while you spend.

Android APK · via Firebase App Distribution