AP Invoice Automation

AP invoice automation built around your exceptions.

We help you design invoice capture, contract-rate checks, and approval routing around your AP rules. The scope defines which steps can be automated and which need review.

  • AI implementation services
  • Automate agreed steps
  • Your exceptions, encoded
  • An exception queue, not every invoice

Built with the leading AI platforms

NVIDIAAnthropic
Peter Enestrom, founder of Zaigo

Led by Peter Enestrom and the Zaigo AI & engineering team

YaleColumbia UniversityMicrosoft

The broken Friday

Three thousand invoices a day. One chaotic inbox.

Controllers and AP managers describe manual review across thousands of vendors. The examples below reflect operating problems reported in client discussions.

  • 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 costs

The backlog is a liability, not an inconvenience.

Operating figures reported in client discussions, not outcomes delivered by Zaigo. We establish a baseline for your workflow before agreeing the build.

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

Reported operating context from anonymized client discussions; not Zaigo results.

How it works

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

    Automate agreed steps

    Test the agreed rules against representative invoices. Define confidence thresholds, required approvals, and exception routing before any automated ERP posting.

    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.

Peter Enestrom, founder of Zaigo
Who builds it

Led by Peter Enestrom.

Co-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

Questions

Asked by controllers and AP managers.

The straight answers, before you book anything.

What’s holding your business back?

A workflow ready for automation. An AI product you want to build. A problem that has sat on the roadmap for years. Let’s talk about what it would take to solve it.

Talk to Zaigo