Paycio on a phone

Send USDTExample

To mobile number

+44 7700 900 123

Amount

250.00 USDT

Network fee paid in USDT

Sent in 4.2 s

[ Case study · Crypto payments ]

Send crypto the way you send a text.

A crypto payment app and merchant gateway where money moves to a mobile number, not a 42-character wallet address. It supports offline payments, gas fees in any token and cross-chain transfers in 50+ currencies.

[ Results ]

Payments People Actually Finish

Countries
40+
countries served with local onboarding and KYC
Failed sends
85%
fewer failed transfers after gas abstraction
Checkout
<5 sec
average time from tap to confirmed payment
Merchant setup
1 day
to go live on the Paycio gateway and API

Figures reflect production performance in the first two quarters after launch.

[ What we built ]

Crypto payments that feel like any other payment app

  1. 01

    Pay by mobile number

    A phone number resolves to the right wallet on the right chain. Enter the amount, confirm with a PIN, done.

    paycio.com
  2. 02

    Offline payments

    Signed transactions can be created without a connection and broadcast when the device is back online.

  3. 03

    Gas in any token

    Fees are paid in whichever token the user holds, with swap-to-pay handled silently in the background.

    paycio.com
  4. 04

    Merchant gateway and API

    Checkout links, QR payments, webhooks and settlement reports so businesses can accept crypto in an afternoon.

[ The client ]

A fintech company on a mission to make crypto usable for everyday payments, serving consumers, merchants and developers across more than 40 countries.

Sector
Fintech & Web3
Reach
40+ countries
Currencies
50+ supported
[ The challenge ]

What Stood in the Way

  1. 01

    Wallet addresses scared people off

    One wrong character and the money was gone for good. Mainstream users would not risk it for a coffee or a bill.

  2. 02

    Gas fees in the wrong token

    Users held USDT but needed ETH or BNB just to move it. Transactions failed and support queues filled up.

  3. 03

    Merchants had no simple way in

    Accepting crypto meant custom integrations, volatile settlement and zero reconciliation tooling.

  4. 04

    Security had to match a bank

    Regulators, partners and users all expected strict KYC, fraud controls and a clean audit trail from day one.

[ How it works ]

From a phone number to a settled payment

What happens in the few seconds after a user taps send.

  • React Native
  • Node.js
  • Solidity
  • EVM Multi-chain
  • KYC / AML Providers
  • PostgreSQL
  • AWS
  1. Step 01

    Recipient entered

    A mobile number or QR code, no wallet address to copy or check.

  2. Step 02

    Identity resolved

    The number maps to a verified wallet and the best chain for the transfer.

  3. Step 03

    Fees and swaps handled

    Gas is paid in the user's token and cross-chain routing is picked automatically.

  4. Step 04

    Settled and recorded

    Transaction confirmed, both sides notified and the ledger updated for reporting.

[ What changed ]

Before and After

Before

Sending crypto meant copying long addresses, holding the right gas token and hoping nothing went wrong. Merchants mostly stayed away.

After

Users send money to a phone number, fees sort themselves out, and merchants take crypto through a checkout that looks like any other.

[ Your turn ]

Planning a fintech product?

Tell us what you are building. You get a clear plan, a fixed price and a team that has shipped this kind of product before.

Delivered in this engagement

  • Consumer wallet apps for iOS and Android
  • Merchant payment gateway and API
  • KYC, fraud and compliance layer
[ Contact ]

Let's build your next product together

Book a free strategy call and leave with a clear plan and estimate. No commitment.

  1. 01Pick a time that suits you
  2. 0230 minutes on scope, stack, timeline and budget
  3. 03Fixed-price proposal, NDA on request
Prefer email? contact@sajaltech.com