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Invoice checks with AI

Every supplier invoice, checked line by line.

Our AI matches your supplier invoices to purchase orders and delivery receipts in your accounting system. You only see what doesn’t match.

Email us How we work

Works with the accounting system you already use

Invoice matching, done for you

You don’t lift a finger. Our AI matches every invoice to its purchase order and delivery receipt, we review the results, and you only hear about the differences.

October invoices: 7 to review

Inbox Suppliers

KOI <report@koi.services>

to me

Nov 3, 9:12 AM

Hi Laura,

out of 312 invoices in October, 305 match and 7 need a look. The 3 most important are below; the full list is in the attachment.

SupplierInvoiceIssueDifference
Gamma PackagingINV-077 INV-077 Quantity − 50 pcs
Beta MetalsINV-204 INV-204 Price + $36.00
Alpha SuppliesINV-118 INV-118 Duplicate $3,920.00
differences-october.xlsxSpreadsheet
  • Quantity

    Not delivered

    If you’re billed for goods that didn’t arrive, in full or in part, we flag it.

  • Price

    Differs from the PO

    We check every invoice line against the price agreed on the purchase order.

  • Duplicate

    Arrived twice

    If the same invoice arrives twice, even under a different number, we flag it.

Costs less than a hire, and starts now

A bookkeeping clerk

$50,670a year, median wage

KOI

First month free

Then a price sized to your invoice volume.

US median wage for bookkeeping clerks, Bureau of Labor Statistics, May 2025.

See the results first, then decide

  1. 1

    Data

    You send us an export of invoices, purchase orders and delivery receipts from your accounting system. Nothing to install, and the way you work stays the same.

  2. 2

    PilotFree

    We check one month of invoices and show you what we would have flagged.

  3. 3

    Ongoing

    If you like it, we start on a monthly fee sized to your invoice volume. Every month you get a report of the invoices checked and the differences found.

Your data stays yours.

  • Read-only

    We read your accounting system; we never change it.

  • Servers in the EU

    Data processed and stored in the European Union, under the GDPR.

  • Never used to train models

    Your invoices are only used to check your invoices.

The people behind KOI

Two founders who personally look after every client, from the first data export to the monthly report.

  • Photo of Federico

    FedericoEngineering and AI

  • Photo of Federica

    FedericaAccounting systems, back office and databases

Questions

How much does it cost?

The first month is free. After that we propose a monthly fee based on how many invoices you get and how much work the checks take off your plate.

What happens after the free month?

You get the month’s report, with the invoices checked and the differences found. If you like it, we start the monthly fee. If not, we stop there.

Who is it for?

Companies with 20 to 250 people that get lots of supplier invoices tied to purchase orders and delivery receipts: manufacturing, distribution, construction and building services.

We’re hiring for accounts payable. Do we still need it?

Yes. Matching invoices to purchase orders and receipts is the longest part of that job: we take it over, and your new hire handles the rest. You can start right away, while you’re still hiring.

Does it work with my accounting system?

We work with QuickBooks, Xero, Sage, NetSuite, and Business Central, and with other systems too: all we need is an export in Excel, CSV or XML. If you’re not sure how to make one, we’ll help.

Do I need to install anything?

No. We work from your system’s exports, read-only, and the way you work stays the same.

Tell us about your back office

Tell us which accounting system you use and how many supplier invoices you get each month.

Email us