AP Invoice Automation01

AP invoice automation where only exceptions reach a human.

We encode your exception rules: no-PO logic, contract-rate enforcement, approval routing. Invoice capture ends in a decision, and only true exceptions reach your team.

  • AI implementation services
  • Touchless where rules hold
  • Your exceptions, encoded
  • An exception queue, not every invoice

Official services partner of the platforms defining AI

NVIDIAAnthropic
Peter Enestrom, founder of Zaigo

Every engagement is led personally by Peter Enestrom and the Zaigo AI & engineering team

YaleColumbia UniversityMicrosoft
The broken Friday01

Three thousand invoices a day. One chaotic inbox.

From AP inboxes we have sat inside: controllers and AP managers at PE-backed services businesses — waste, facilities, distribution — running 2,000+ vendors through a process that ends in a person, every time.

  • Bills without PO

    Bills land with no purchase order behind them. Someone works out what the bill is even for, who approved it, whether the work happened, before matching can begin.

  • “We don’t know what we owe”

    Heard from the sponsor side of a PE-backed services business: the liability sits in the inbox, and nobody can put an honest number on it. It never clears.

  • Burned by 20% accuracy

    The last tool promised AI invoice processing and read one field in five. Extraction failed quietly — the team keyed everything anyway, with a new system to babysit.

  • The 70-page PDF someone splits by hand

    One supplier sends a single PDF holding 34 sub-invoices. A person splits it, keys each one, re-checks the totals, every month, for every vendor who bills this way.

  • Price creep nobody is checking

    Nobody checks invoice prices against the contracted price sheet — the owner of that job left. Price creep surfaces at the quarterly review, months after the money left.

  • The payment run that fails quietly

    Payment files fail on formatting, duplicates slip through under new invoice numbers, bills for work that never happened get paid. Each error is small. The total is not.

What manual costs02

The backlog is a liability, not an inconvenience.

From AP organizations we have measured. Your numbers will differ — the first week shadows your inbox and puts figures on yours before anything gets built.

3,000Invoices a day through one chaotic inbox at a PE-backed services business
15,000Unprocessed bills in the backlog of one AP organization
130People matching invoices by hand at another

From anonymized engagements — waste services, facilities, distribution

How it works03

We encode your exceptions.

The rules your best AP person carries in their head become the system. No new inbox for your team to learn.

  1. 01

    Shadow the inbox

    We sit inside your AP inbox and catalog every exception type: no-PO bills, stale POs, pass-through charges, rates that crept. The exception list defines the build.

    Week 1
  2. 02

    Encode the rules

    Match and exception rules written against your vendors, contracts, and rate sheets: no-PO logic, contract-rate enforcement, approval routing. Every rule documented — the rule set is yours.

    Weeks 2–6
  3. 03

    Touchless where rules hold

    Clean invoices flow to your ERP untouched. Failures land in an exception queue — right person, reason attached. Your team approves exceptions, not every invoice.

    Ongoing
Not another tool

They sell extraction. Extraction was never the hard part.

The AP software on page one demos beautifully on clean PDFs. Then it meets your inbox: emailed bills, scanned tickets, the 70-page supplier statement. Extraction was never the hard part — your exceptions are.

The tools ship generic rules because they cannot know yours — every real exception reaches a human. We deliver AP automation services as an engagement: our AI reads every invoice against your encoded rules — no new system, no per-seat license.

In production
20%Extraction accuracy on emailed and mailed bills before — the baseline the last tool left behind
34Sub-invoices once split by hand from a single 70-page supplier PDF, now read and split automatically
2,000+Vendors whose invoices run through encoded exception rules at one services business
The bills without a PO used to take half my team’s week. Now those are the only ones we see.
AP manager, PE-backed facilities services company
Peter Enestrom, founder of Zaigo
Who builds it

Led by Peter Enestrom.

Founder — leads AI & Engineering

Pete Enestrom

Every engagement is led personally by Pete, working with the Zaigo AI & engineering team from the two-week audit through the production handover. The person who scopes the work is the person who builds it.

Education
Yale & ColumbiaGraduate
Background
Microsoft & IntelFormer
Experience
Exited FounderVenture-Backed

Background

Questions04

Asked by controllers and AP managers.

The straight answers, before you book anything.

Two-way matching compares the invoice to the purchase order. Three-way matching adds the receiving document — proof the goods or services actually arrived. Most exception queues come from bills that fail one of those checks, or that arrive with no PO to match against at all.

No-PO logic is encoded as rules, not left to judgment: who approved the spend, which vendor sent it, whether the amount fits a contract. Bills that satisfy the rules route for approval automatically; only the ones that fail reach your team.

The software ships with generic rules because it cannot know yours — your vendors, your contracts, your tolerance for a stale PO. It extracts fields on clean documents, then sends every real exception to a human anyway. Encoding the exceptions is the work; extraction is a commodity.

Every invoice line is checked against the contracted price sheet, every time. A rate that crept, a surcharge that appeared mid-contract, a case billed as an each — each one lands in the exception queue on the first invoice, not at the quarterly review.

Invoice capture is getting the data off the document — reading the emailed PDF or the mailed bill. Invoice processing is everything after: matching, coding, approval, posting. Capture was never the bottleneck in the AP inboxes we have sat inside; deciding what to do with the exceptions was.

Start with one workflow.

Tell us where your team loses hours. We will come back with a straight answer on whether AI can help, what it would take, and what it would pay.