Backed by Y Combinator

AI accounting agents for construction & manufacturing.

ProcIndex runs AP, AR, vendor replies, and bank reconciliation inside your ERP under the approval rules you set, and your team reviews the exceptions. The film above follows one month-end night at a construction company’s accounting office, from the invoice pile left on the controller’s desk at 5:42 PM to a clear queue at 8:58 AM.

Month-end, and the team goes home with a full tray.

98.1%

of invoices processed without human intervention, across all customers, January–October 2026.

ProcIndex works inside the ERP you already run, and the ERP stays the system of record.

  • NetSuite
  • Sage Intacct
  • QuickBooks

The records are in your ERP, but the matching, coding, and follow-up still happen by hand.

Construction teams contend with project coding and progress billing. Manufacturers contend with invoice volume and PO variances. Both need clean entries, clear exceptions, and control before anything posts.

  • Invoice intake and rekeying Invoices, pay applications, credits, and statements arrive in different formats and inboxes.
  • Project and dimension coding Every invoice needs the right project, cost code, entity, and dimensions before it can post.
  • Invoice-to-PO mismatches Price, quantity, tax, and duplicate issues must be investigated line by line.
  • Progress billing reviews Pay applications must be checked against the PO, prior billing, and remaining commitment.
  • Approvals waiting on context Reviewers need the invoice, PO, variance details, and supporting documents before they can act.
  • Exceptions scattered across tools PO selections, corrections, and approval decisions get buried in email and spreadsheets.
  • Vendor status interruptions AP repeatedly stops processing to answer where an invoice stands and when it will be paid.
  • Collections follow-up Overdue accounts require consistent outreach, promise tracking, and timely escalation.

Routine invoices post under the rules you set, and exceptions wait for your team.

AP, vendor, AR, and reconciliation agents work from the same ERP data, policies, and audit trail. Routine work moves forward, and exceptions stay with your team.

AP agent

The AP agent matches, codes, and posts every invoice.

Invoices arrive by email, vendor portal, and photo. The AP agent reads them, matches lines to purchase orders and receipts, codes them to the job and cost code, checks lien waivers before subcontractor payments, and posts what passes your policy.

  • AP stops rekeying invoices from inboxes, portals, and paper.
  • Line-by-line PO checks happen in the ERP instead of a spreadsheet.
  • No subcontractor is paid without the waiver on file.
Read about the AP agent
Vendor agent

The vendor agent answers supplier questions in your company's voice.

Suppliers ask where an invoice stands and when it pays. The vendor agent answers from live AP data, in your company's own terminology and voice, and hands anything sensitive, like a bank-detail change, to a person with the thread attached.

  • Status requests stop interrupting the AP team.
  • Replies use your company's terminology.
  • Bank-detail changes and other sensitive requests go to a person.
AR agent

The AR agent sends the follow-ups and records every promise to pay.

The AR agent works overdue receivables straight from your ERP: consistent follow-up, promises to pay recorded against the right invoice, and disputes escalated with the customer's reply and the evidence attached.

  • The collections schedule is kept in the ERP.
  • Each promise to pay is recorded against its invoice.
  • Disputes reach your team with the customer's reply attached.
Read about the AR agent
Recon agent

The reconciliation agent applies cash the day it lands.

The reconciliation agent watches the bank feed. A customer payment is matched to its invoice and entered in the ERP the same day, not two or three days later. Fees and transfers post to their accounts, and anything unexplained waits in your queue.

  • Deposits are applied the day they land.
  • Unmatched bank lines are flagged the day they appear.
  • Month-end starts with the bank already reconciled.
Read about the reconciliation agent

The same invoice, with and without ProcIndex.

Follow the same supplier invoice through AP the way it runs today, and the way it runs with ProcIndex. Then the same customer payment.

Without ProcIndex

  1. Arrives everywhere email, portal, paper
  2. Waits in an inbox days
  3. Keyed by hand 14 lines
  4. Chased for approval days
  5. Checked in a spreadsheet row 312
  6. Filed and forgotten no trail

Each of these steps is someone's time.

With ProcIndex

  1. Lands in your inbox same email
  2. Read and classified vendor, amount, cost code
  3. Matched and coded PO, tolerance, duplicate
  4. Routed for approval policy AP-2
  5. Posted and verified in your ERP
  6. Audit trail attached every decision

Your team handles only the exceptions.

A customer payment, without ProcIndex

The deposit lands on Monday. Someone spots it in the bank feed, hunts for the invoice it belongs to, and keys the receipt into the ERP two or three days later.

With ProcIndex

The deposit lands on Monday. It is matched to the open invoice, applied, and posted to the ERP the same day, with the bank line reconciled.

Connect your ERP, set the approval rules, and start on real invoices.

Sync POs and accounting dimensions, configure matching tolerances and approvals, then validate ProcIndex on real invoices and pay applications.

  1. Step 1

    Connect your ERP

    Sync the vendors, purchase orders, projects, dimensions, and transaction data each workflow needs.

  2. Step 2

    Configure your controls

    Define matching rules, payable entities, variance tolerance, and approval paths.

  3. Step 3

    Process and review

    ProcIndex captures, matches, codes, and routes invoices; uncertain cases go to the shared work queue.

  4. Step 4

    Approve and post

    Approved invoices post to your ERP with the supporting workflow, decisions, and actions preserved in the audit trail.

Every automated action comes with evidence

Your ERP remains the system of record. Every match, rule, approval, exception, and posting stays visible and traceable.

Match sources

The PO lines, the receipt, and the tolerance the agent compared are attached to the invoice.

Posting policy

The approval rule that allowed the posting is written to the ERP audit trail with the entry.

Exception reasons

An invoice held for review arrives with what failed: a missing receipt, a price outside tolerance, a waiver not on file.

“Our plants receive several thousand supplier invoices a month, and most of them used to wait for someone to find the receipt. The match now runs overnight, the clean invoices are posted before the AP team logs in, and the team spends its morning on the ones with a real price or quantity variance.”

CFO Plastics manufacturer with $1.2B in annual revenue

Questions finance teams ask us

How does ProcIndex work?

ProcIndex connects to your ERP as the system of record. Its agents read the vendors, purchase orders, projects, dimensions, and transactions each workflow needs, then move routine accounting work forward under your matching and approval policies.

Does ProcIndex replace our accounting team?

No. ProcIndex handles repetitive capture, matching, coding, routing, follow-up, and reconciliation work. Your team keeps approvals, exceptions, sensitive conversations, and accounting judgment, with a work queue and audit trail behind every action.

Which document types does ProcIndex read?

Yes. ProcIndex handles partial invoices against open PO lines, recognizes credit memos separately from standard invoices, reviews cumulative pay applications against commitments, and turns photographed field tickets into structured data for matching and coding.

Can ProcIndex post without a human approving every invoice?

Only within the policies you configure. You can set approval paths, thresholds, amount bands by currency, and the conditions that require review. Anything outside policy lands in the work queue with the evidence attached.

Which accounting workflows do the agents handle?

ProcIndex agents cover AP processing (including 2-way and 3-way matching and lien waiver checks on subcontractor payments), vendor invoice-status inquiries, AR collections, and account reconciliation. A month-end close agent is in early access. Each agent works within your permissions, approval paths, and escalation rules.

Why is ProcIndex built for construction and manufacturing?

The workflows reflect the accounting details these teams deal with every day: project and cost-code dimensions, progress billing and pay applications, partial invoices, PO-line variances, distributed approvers, and high supplier volume.

Do you only work with construction and manufacturing?

No. Those are our core, but customers also include roofing contractors, food and beverage producers, plastics and packaging manufacturers, consumer products and toy makers, and field service companies such as commercial window cleaning and solar panel cleaning. If your accounting is tied to jobs, plants, or service routes, it is likely a fit.

How is customer data protected?

ProcIndex is SOC 2 Type II. ERP credentials are encrypted with key rotation, access is role-based, agents have an org-level kill switch, and every action is written to an append-only audit trail.

See ProcIndex on your invoices, inside your ERP

Book a live walkthrough of the workflows above on your ERP, your document types, and your controls.