Invoicing that runs itself
Invoices out on time, checked before an error costs you, and paid on a branded link in seconds.
Invoicing is busywork that leaks money
Someone raises each invoice by hand, hopes the numbers are right, attaches a PDF and waits to be paid — then reconciles it all later. Errors slip through, duplicates get paid, and cash comes in slow.
Fynex runs the whole thing. It raises and sends invoices automatically, reads each one with AI to catch the mistakes, and gets you paid on a link that reconciles itself back to your books.
From the invoice raised to the payment booked, without you
Three steps from setup to settled — then it runs itself.
- 1
Fynex raises the invoice
From your billing rules and accounting, Fynex creates and sends each invoice automatically — branded, in the right currency, on schedule. You stop typing invoices one by one.
- 2
AI checks every one
Before an invoice goes out or gets paid, Fynex reads it — flagging duplicates, wrong amounts, missing terms and rate drift — so the error is caught before it costs you, not after.
- 3
Paid on a link, reconciled
Your customer pays on a branded link with cards, Apple Pay or Google Pay. The moment it's paid, Fynex books it back to your accounting — VAT and currency handled.
Invoicing, end to end
From raising the invoice to the payment booked behind it — created, checked, collected and reconciled for you.
Auto-invoicing
Fynex creates and sends each invoice automatically from your billing rules and accounting — branded, scheduled, in the right currency. No one types invoices one at a time.
AI invoice analysis
AI reads every invoice and flags duplicates, wrong amounts, missing terms and supplier rate drift — before money moves, not after.
Branded payment links, instantly
Send a one-off or reusable link with your logo and colours. Customers pay on a hosted checkout — cards with 3-D Secure, Apple Pay or Google Pay.
Recurring billing on autopilot
Bill on a monthly or annual schedule with trials and promo codes. Failed charges retry, and every charge reconciles back to your books.
Issue it and collect it
from your own system
Invoices do not become money when you send them: they wait, they get chased, and the work behind them is already paid for.
A payment page on every invoice
Each invoice carries a hosted page with every method switched on, so paying is one tap.
POST /payments-api/v1/checkout
{ "externalOrderRef": "INV-2291",
"amount": 1240.00,
"currencyCode": "GBP" }Recurring invoices that charge themselves
The first payment opts into merchant-initiated repeats; the schedule after it needs no one to press send.
POST /payments-api/v1/initialize-payment
{ "subscription": { "enabled": true,
"allowSubsequentMerchant
Initiated": true } }Match a transfer to its invoice on arrival
A pay-in IBAN per customer means a bank payment lands attributed instead of waiting to be matched.
GET /payments-api/v1/payees
→ { "payees": [{ "id": 101, "legalEntityId": 77, "displayName": "Primary Payee", "role": "Contractor", "merchantId": "merchant-1", "status": "Active", "isActive": true, "createdAt": "2026-04-07T10:00:00Z", "updatedAt": "2026-04-07T10:00:00Z" }], "total": 1, "limit": 20, "offset": 0 }Credit notes without the unwind
A partial refund reverses against the original payment and keeps its parent, so nothing is orphaned.
POST /payments-api/v1/payments
/INV-2291/refund
{ "amount": 240.00 }This month's invoicing, run for you
Fynex raises and sends the invoices, checks each one with AI, collects on a branded link and books every payment back to your accounting. You watch the money come in, not the admin.
What it catches before the invoice goes out
Fynex reads every invoice as it's raised and as it's paid, catching the duplicate, the wrong amount and the rate that drifted before it costs you, and booking each payment back the moment it lands. The busywork that quietly leaked money, gone.
The same job, with the leaks closed
Point tools solve part of it. Fynex runs the whole thing on one platform.
The rest of the job, also handled
Beyond the headline job, every account gets the whole platform behind it.
Auto-invoicing
Invoices raised and sent for you, branded and on schedule.
AI invoice analysis
Every invoice read for duplicates, errors and rate drift.
Branded payment links
One-off or reusable, your logo and colours, sent in seconds.
Recurring & subscriptions
Trials, retries and hybrid contracts — Subscriptions & Contracts.
Multi-currency & VAT
Collect in GBP, USD, EUR and more, with VAT handled.
Auto-reconciliation
Every payment matched to its invoice and booked.
The ways in, and the books they land in
Cards and wallets your customers already use, your accounting kept in sync behind every invoice.
Accounting stack
13Every payment, fee and payout lands in your ledger, coded and reconciled — nobody re-keys it.
Banks & business accounts
18We read your balances and pay out of whichever account is cheapest — no bank portals, no copy-paste.
Invoicing & contracts
9The contract sets the terms; we hold you to them — discounts, retention, caps, all applied before money moves.
Payroll & contractors
12Everyone you owe who isn't a supplier — crew, contractors, freelancers, in whatever currency they bank in.
Spend & expenses
8Cards, receipts and subscriptions on the cost side of the same ledger.
Spreadsheets & docs
6The spreadsheet you rebuild every month — we fill it, or replace it. Your call.
Your customers pay however they already pay — Visa, Mastercard, American Express, Apple Pay, Google Pay, Faster Payments, bank transfer and open banking — through the provider you run today or through us.
Find what you're leaking, for free
Send us your setup. We run a free diagnostic and show you what your payment stack costs you today.