AP Automation vs. Construction Invoice Verification
Stampli routes invoices for approval across 70+ ERPs. CheckIT verifies that what those invoices say matches what you contracted for — line by line. They do different jobs.
Stop paying for line items you never agreed to.
Quick verdict
What Stampli does
Stampli is a category-leading horizontal AP automation platform built around "Billy the Bot," its decade-old AI coding assistant. It routes invoices for approval across 70+ ERPs — including Sage 300 CRE, Sage Intacct CRE, Acumatica, Vista, and Yardi for construction firms. Construction is one of many verticals Stampli serves; it isn't the primary build. With $148M raised and Blackstone as lead investor, Stampli is widely regarded as best-in-class on AP UX.
- Invoice Coding (Billy AI) — GL, cost codes, departments, projects
- 2-way / 3-way PO matching within your ERP
- Approval routing + centralized "Sticky Note" thread on every invoice
- Payments via ACH, check, card, or international wire (Stampli Direct Pay)
What CheckIT Invoice does
CheckIT Invoice is a construction-specific verification engine. It compares every line on an incoming invoice against your contract baseline — your quote, your rate sheet, or your rolling 12-month historical rates — and tells you what's wrong, where, and by how many dollars. Minutes per document. No ERP integration. No 60-day implementation. The output is an explainable, severity-ranked, dollar-quantified report you can act on the day you receive it.
- Line-item verification against contract, quote, or rate sheet
- Explainable dollar delta per line, ranked by severity
- No ERP integration — upload a PDF and go
- 75% less manual review time per document
Feature comparison
Stampli routes. CheckIT verifies. You need both.
Stampli answers "who needs to approve this?", "what GL account does it code to?", "does the total match the PO?" — real questions it does better than almost anyone. But Stampli does not answer the question that quietly drains construction margin: does what the invoice says match what we contracted for?
“We rolled out Stampli for AP routing and it's beautiful — but Stampli doesn't tell us whether the price per linear foot on Line 7 matches our contract. We still have a human doing that, and it still takes the better part of an hour per invoice.”
Illustrative scenario from CheckIT customer discovery, mid-market GC.
Industry data puts the scale in plain sight: 39% of construction invoices contain at least one error, and overbilling averages 2.5% of invoice value. CheckIT cuts the manual line-item check a Controller or PM still does by 75% — minutes instead of the better part of an hour — with an explainable, dollar-quantified report.
If you need Stampli: a 40-user finance team running NetSuite or Sage Intacct.
You've got 1,500+ invoices a month flowing across multiple entities, and your AP team is drowning in email approvals and manual GL coding. Stampli's Billy AI codes line-by-line, the Sticky Note thread kills the email chase, and Direct Pay closes the loop end-to-end. This is exactly what Stampli was built for, and they do it better than almost anyone in the AP category.
If you need CheckIT: a $50M GC running Sage 300 CRE with Stampli for routing.
Your AP automation is working — invoices get approved fast and coded cleanly. But your PMs and Controllers are still opening every subcontractor and material invoice next to the contract or rate sheet, hunting for line-item creep, unit-of-measure swaps, and rate drift. CheckIT runs that check in minutes per document, against the contract baseline. Stampli routes. CheckIT verifies. Same invoice, different layers.
The cost of not verifying
Every unverified invoice is a bill paid on trust. These are the numbers that drove us to build CheckIT.
Across the trades, 39% of construction invoices contain an error.
As a share of invoice value — quietly compounding across every job.
Minutes per document instead of the better part of an hour.
Extrapolated from active pilot data. Results vary by invoice volume and contract complexity.
CheckIT vs. Stampli — common questions
No — Stampli matches invoice lines to PO lines, not to a contract, quote, or rate-sheet baseline. Its line-level matching is excellent at confirming PO existence and quantity alignment, but the contract, RFQ response, and master rate sheet typically live outside the PO system entirely — in PDFs, emails, or shared drives. That's the verification layer CheckIT runs.
Yes — and that's the recommended architecture for most construction firms. Stampli handles AP workflow (coding, approval routing, payment) across 70+ ERPs. CheckIT runs the line-item-vs-contract verification check before approval. Same invoice, different layers, no overlap. Most CheckIT customers keep their existing AP automation and bolt CheckIT in for the verification step.
Stampli routes invoices for approval; CheckIT verifies that what each invoice says matches your contract. Stampli is a horizontal AP automation platform serving finance teams across many verticals — construction is one of them. CheckIT is a construction-specific verification engine that runs three modes: Quote → Invoice, Rate Sheet, and Rolling 12-Month Historical.
CheckIT and Stampli price on different axes, so direct comparison isn't useful. Stampli is a quote-driven per-user-plus-per-module subscription (reportedly $10–$15/user/mo at the per-user component, with payment transaction fees on top). CheckIT is per-document or per-engagement, with no ERP integration cost. Most customers run both and treat them as separate budget lines.
No — switching off your AP automation would be the wrong move. Stampli's routing, coding, and payment workflow stays in place. CheckIT slots in as a pre-approval verification step on the invoices that matter most: subcontractor billings, material invoices with cost codes, T&M tickets, and any invoice tied to a contract or rate sheet outside the PO system.
Compare CheckIT to other tools
See CheckIT Invoice run against one of your invoices.
Upload one PDF. We'll show you exactly where the line items don't match your contract — and the dollar delta — within minutes.
No ERP integration required. No credit card. No sales call to start.