Verify vendor invoices against your master price list automatically

Reads incoming invoice emails, extracts the line items, and checks them against your price list for mismatches.

How the work actually flows

A straight line. Runs once per each invoice email received.

Pattern: Sequence (1) ยท Multiple Instances with a priori Run-Time Knowledge (14)

flowchart TD trig(["daily invoice inbox check"]):::trigtime s0[["save invoice pdf"]]:::mi s1["extract line items via ocr"]:::task s2["compare to price list"]:::task s3["email summary report"]:::task trig --> s0 s0 --> s1 s1 --> s2 s2 --> s3 out[/"logged invoice price comparison"/]:::out pay{{"catches overcharges automatically"}}:::pay s3 --> out out --> pay classDef task fill:#e7f6fe,stroke:#34b8f0,color:#2c2a29 classDef svc fill:#f6f8fa,stroke:#7c8795,color:#2c2a29 classDef mi fill:#e7f6fe,stroke:#0079a8,color:#2c2a29,stroke-width:2px classDef human fill:#fff,stroke:#0079a8,color:#0079a8 classDef store fill:#f6f8fa,stroke:#0079a8,color:#2c2a29 classDef trig fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigtime fill:#00a4eb,stroke:#0079a8,color:#fff,font-weight:bold classDef trigdata fill:#8ad4f5,stroke:#0079a8,color:#06314c,font-weight:bold classDef gate fill:#fff,stroke:#e8a23d,color:#6b4708,font-weight:bold classDef out fill:#1f9d6b,stroke:#167a53,color:#fff,font-weight:bold classDef pay fill:#06314c,stroke:#021f33,color:#fff
Starts itA stepRuns once per itemResultPayoff
Build size
Advanced

A larger build with multiple systems, AI reasoning, and custom rules.

Business functions
AI Agents & Autonomous SystemsEmail AutomationDocument Processing & OCRImage & Media ProcessingSpreadsheet & Database OpsFile & Cloud StorageFinance & Accounting
Connects
GmailGoogle DriveGoogle Sheets
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The problem it solves

Checking every vendor invoice against your agreed prices line by line eats up hours your accounts team doesn't have. Mistakes and overcharges slip through when someone is rushing to keep up with a full inbox of bills.

Who it fits

Accounts, finance, and procurement teams that process vendor invoices regularly.

How it works

  1. The system checks a vendor email inbox for new invoices each working day
  2. It saves each invoice PDF into a dated folder in Google Drive
  3. OCR and AI extract the item names, quantities, and prices from each invoice
  4. It compares every line against your master price sheet and flags mismatches
  5. You receive a summary email showing what matched and what didn't
What you get

Invoice mismatches caught before you pay

Every vendor invoice gets checked line by line against your price list, so overcharges get flagged before you approve payment.

What you get

A logged, line-by-line comparison of each invoice against your master prices, with mismatches flagged and a summary emailed to you.

What you need

A Gmail account, a Google Drive account, and Google Sheets, plus an OCR and AI service.

We can build this. But should you?

The hard question is not how to build it. It is whether this is the right thing to build first.

That is what a Fractional Chief AI Officer figures out with you, before anyone writes a line of code.

Let's Talk Strategy

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