Most accounts payable (AP) teams without an ERP don't have an approvals problem yet. They have a typing problem. Invoices land in a shared Gmail or Outlook inbox, more get downloaded from utility and carrier portals, and a clerk types each one into a Google Sheets register and then again into QuickBooks. AI document processing for accounts payable removes that step. It reads supplier invoices from email, PDFs, scans and portal downloads, and sends the data to a spreadsheet or to an accounting tool such as QuickBooks Online or Xero, with no enterprise resource planning (ERP) project.
The catch is that "AP automation" is sold as one category and is really three. Intelligent document processing (IDP) reads invoices, AP automation software approves and pays them, and robotic process automation (RPA) fetches them from supplier portals. Buy the wrong one and you get a polished approval workflow for invoices someone still types in by hand. This guide compares all three, maps an AP workflow that runs without an ERP, and ends with a test you can run on your own invoices before anyone books a sales call.
Key Takeaways
- Three tool types, three jobs: IDP extracts invoice data, AP automation software runs approvals and payments, and RPA fetches invoices from supplier portals that won't email them.
- No ERP is not a blocker. A Google Sheets or Excel AP register, QuickBooks Online or Xero can serve as your system of record until several legal entities, three-way matching or audit requirements make an ERP necessary.
- Keep people on payments. Extraction fills the register, while your team still validates invoice fields, checks for duplicates and authorizes every payment.
- Test on your own invoices. Run 30 to 50 recent documents, including multi-page line items, scans, credit notes and odd layouts, through each tool, because vendor accuracy claims aren't comparable without the same documents and the same test.
What AI Automation Tools Work for AP Teams With Disconnected Portals, PDFs and No ERP?
AP teams without an ERP need three kinds of tools working together: an IDP platform to extract supplier invoices, AP automation software for approvals and payments, and RPA or workflow tools for supplier portals. Most teams start with the first, because retyping is where the hours go.
- Extract invoices from PDFs, scans and email: Parseur, Nanonets or Docsumo, sending data to a Google Sheets or Excel AP register, QuickBooks or Xero.
- Approve and pay bills: BILL, Ramp Bill Pay, Stampli or Ottimate, usually connected to QuickBooks or Xero.
- Collect invoices from supplier portals: UiPath or Microsoft Power Automate, when a portal can't email the PDF.
- Already on QuickBooks or Xero with simple invoices: their built-in bill capture may be enough.
AI assistants also name tools that sit outside this guide's scope. Tipalti focuses on supplier onboarding and global payments. Automation Anywhere is an enterprise RPA platform comparable to UiPath. AI agent builders such as Gumloop and Lindy let you assemble your own portal and PDF workflows, which you then maintain. Rossum, now part of Coupa, and enterprise suites such as HighRadius fit teams that already run an ERP or Coupa.
Why AP Without an ERP Is a Different Problem
Without an ERP, no single system knows an invoice exists. It sits in an email, a portal download, a PDF and a spreadsheet row at once, and answering "did we pay this?" means checking all four.
Take a 40-person distributor that receives about 600 supplier invoices a month. Most arrive in a shared AP inbox in Gmail or Outlook, some are downloaded from utility and telecom portals, and a few still come on paper. The AP clerk types each invoice into a Google Sheets register, then again into QuickBooks. Duplicates and missing invoices only surface when a supplier statement doesn't match.
The search for a tool usually starts with one of three triggers: invoice volume outgrows the clerk, month-end close starts slipping, or the bill capture in QuickBooks or Xero (or pasting invoices into ChatGPT) can't keep up with dozens of supplier layouts. It's usually the AP lead, controller or finance manager who goes looking, and sometimes the outside bookkeeping firm that runs AP for the company.
Manual entry is where the time goes. A 2025 Parseur and QuestionPro survey of 500 U.S. professionals found that respondents spent more than nine hours per week manually transferring data between documents and business systems. Many AP automation suites also assume an accounting system or ERP to sync with, so teams without one face extra setup.
Ardent Partners' Accounts Payable Metrics that Matter in 2026, based on nearly 200 AP, finance and P2P leaders, puts the average cost to process an invoice at $9.90. The 2025 edition, drawn from 212 AP and finance leaders, found the average AP organization took 9.2 days to process an invoice. Both surveys lean toward larger organizations, so results may differ for teams without an ERP.
To size the cost for your own team, multiply monthly invoices by the minutes each one takes to enter and by the hourly labor cost, then add correction time. At 400 invoices a month, 6 minutes each and $25 an hour, manual entry costs 40 hours and $1,000 a month before anyone fixes a typo.
The practical first step is narrower than most AP software pitches suggest: get every invoice's data into one register without retyping it. IDP handles that extraction, and approvals and payments can keep running the way they do today.
For more on these challenges, see manual invoice processing challenges. For how AI is changing the AP process, see AI in accounts payable.
Three Types of AP Automation Tools
Each category covers a different part of the AP process and needs something different from you before it works.
| IDP platforms | AP automation software | RPA and workflow tools | |
|---|---|---|---|
| Main job | Extract invoice headers and line items from invoices, credit notes and statements | Manage invoice coding, approvals, payments and vendor records | Automate portal downloads, data transfers and repetitive system actions |
| What it needs | An email inbox, document upload or application programming interface (API) connection | Usually an accounting system or ERP integration | Access to target systems, configured workflows and stable portal interfaces |
| Best for | AP teams receiving varied documents from many suppliers | Teams that need structured approval and payment processes | Teams handling invoices across supplier portals and disconnected systems |
In practice the three stack rather than compete. An IDP platform fills a central AP register, an RPA tool fetches documents from the portals that won't email them, and AP automation software takes over approvals and payments once the team needs them.
The Documents AP Teams Handle
Supplier invoices are only part of the pile. Each document type below carries something you need for payment, reconciliation or recordkeeping, and every supplier formats it its own way.
- Supplier invoices: different layouts, tax fields and multi-page line items make consistent extraction hard.
- Credit notes: adjustments that must be matched to the right invoice.
- Supplier statements: the list of invoices, payments and credits you reconcile your AP records against.
- Purchase orders and delivery notes: when you have them, they let you compare ordered, received and invoiced quantities.
- Utility and recurring bills: billing periods, account numbers and charges vary by provider. See utility bill data extraction.
- Portal-downloaded PDFs: someone has to fetch these before anything can be processed.
- Scanned paper invoices: optical character recognition (OCR) reads the text, but image quality affects extraction. See invoice OCR.
Whatever the supplier or delivery channel, each of these should end up as the same named fields in the same register.
Building an AP Workflow Without an ERP
You can automate invoice intake, extraction and tracking without an ERP. What you can't skip is one central record for every invoice, with validation, approvals and payments kept under control. That's AP automation without an ERP in practice.
A Six-Step AP Workflow
- Collect: receive invoices through a shared AP inbox, uploads, or a Google Drive or SharePoint folder for portal downloads.
- Extract and normalize: capture supplier names, invoice numbers, dates, totals, taxes, purchase order (PO) references and line items in consistent formats.
- Validate: check required fields, invoice totals and possible duplicates against existing records. Flag exceptions for review.
- Record: add each invoice to a central AP register in Google Sheets, Excel or SharePoint, or create a bill in QuickBooks or Xero. Keep a link to the source PDF.
- Route: send invoices for approval through configured workflows in Zapier, Microsoft Power Automate or the accounting application.
- Pay: require an authorized person to review and release payments.
Invoice exceptions were the top AP challenge in Ardent Partners' 2025 report, cited by 53% of respondents, and the average invoice exception rate was 14% in 2024. Missing information, coding errors and PO discrepancies are why validation and exception review belong in an AP workflow.
Where Each Tool Fits
Back to the distributor. Invoices from the AP inbox and a Google Drive folder of portal downloads flow into one Google Sheets register and create bills in QuickBooks. IDP does the extraction, RPA handles any portal that refuses to email, and a workflow tool routes records and exceptions. The clerk reviews exceptions instead of retyping 600 invoices a month.
Which AP Register or Accounting Tool Do You Use?
This is how extracted invoice data reaches the system of record most no-ERP AP teams use.
| Your system of record | How extracted invoice data gets there |
|---|---|
| Google Sheets AP register | Native Parseur export, one row per invoice or per line item |
| Excel AP register | Native Parseur export to Excel |
| SharePoint list | Power Automate |
| Airtable base | Zapier |
| QuickBooks Online | Zapier, which creates bills from the extracted fields |
| Xero | Zapier, which creates bills and credit notes |
| An ERP you adopt later | Webhooks or the API, so extraction carries over unchanged |
Parseur sends data natively to Google Sheets and Excel, and through Zapier, Make, Power Automate and webhooks to QuickBooks, Xero, SharePoint and Airtable.
Keep Payment Controls Human
Never release a payment on extracted data alone. Keep an audit trail of approvals and changes, and separate duties: whoever enters or approves an invoice shouldn't be the one who releases the payment.
The FBI's 2025 Internet Crime Report recorded 24,768 business email compromise (BEC) complaints, with about $3.05 billion in reported losses. Those figures cover all reported BEC cases, not AP fraud alone. For AP teams, they are a reason to verify any change to supplier payment details independently before funds go out.
What to Look for in AI Document Processing for AP
The right IDP platform handles invoices from any supplier, keeps line items whole and delivers usable data to your AP workflow without an ERP implementation.
Put these ten points to every platform on your shortlist:
- No template per supplier: a new vendor layout should work without building a template for it.
- Multi-page line items: does every row, description, quantity and amount survive the page break?
- PDFs and scans: digital PDFs, scanned paper and portal downloads all need to work.
- Document intake: can it read from a shared inbox, a cloud folder and manual uploads?
- Validation rules: required fields, totals and inconsistent values get checked before anything is exported.
- Exception handling: how are failed invoices surfaced, and can staff correct them before data reaches downstream systems? See human-in-the-loop AI.
- Data delivery: records reach Google Sheets, Excel, QuickBooks, Xero or an API, directly or through an integration.
- Daily ownership: if every change needs IT, finance operations doesn't really own the workflow.
- Security and compliance: ask what controls cover document access, retention, hosting and personal data.
- Time to production: count setup, testing and the ongoing maintenance nobody puts in the budget.
Judge the whole workflow, not extraction alone. A platform that captures invoice fields but leaves your team rebuilding line items or moving records by hand hasn't fixed your AP problem. It has moved it.
If you're weighing a custom extraction pipeline against a platform, see build vs. buy invoice data extraction.
Tool details in the following sections come from each vendor's public documentation, reviewed in October and November 2026.
Best IDP Platforms for Accounts Payable Teams
IDP platforms turn supplier documents into structured records for spreadsheets, accounting software or other systems. For IDP for AP teams without an ERP, the deciding factors are where the data has to land and who on your team will maintain the setup.
Parseur publishes this guide and lists its own platform first. The tools below are not ranked.
Parseur
Parseur is an IDP platform for AP teams whose invoices arrive from many suppliers through inboxes, folders and uploads, and need to land in a spreadsheet register or accounting tool without an ERP project.
Parseur extracts invoice headers, taxes and line items from PDFs, scans and photos using OCR and Vision AI. You describe each field in plain English, so a new supplier layout doesn't need a new template. Table fields capture repeating line items.
In Parseur's Multilingual Invoice Extraction Benchmark 2026, run in October 2026, Parseur extracted all 200 fields correctly from German, French, Japanese and Korean invoices, including a two-page invoice and a phone photo. It was the only zero-error result among six IDP tools. For a US AP team, the formats matter more than the languages: a page break in the line items and a photographed invoice are exactly what a varied supplier base sends.
The AP lead defines the fields and instructions in the Parseur app. Someone comfortable with Zapier, Power Automate or the API, often an outside bookkeeper or integrator, connects the output once. After that, adding a new supplier doesn't need IT.
Parseur normalizes dates, numbers and addresses and validates each result against its extraction schema. A document that fails validation appears in the Parseur interface, triggers an email notification and fires a webhook. Parseur exports data to Google Sheets and Excel, and sends it to QuickBooks or Xero through Zapier, Make, Power Automate, webhooks or the API.
Parseur has operated in production since 2016 and processed more than 100 million documents. It completed a SOC 2 Type II examination in September 2026, complies with the General Data Protection Regulation (GDPR), hosts customer data in the European Union, lets customers configure document retention and maintains 99.9%+ uptime. See Parseur Security.
Setup and pricing: forward a batch of recent supplier invoices to a Parseur mailbox, check the fields, and connect your register or accounting tool. Pricing is public, and the free plan lets an AP lead test on real invoices before anyone books a sales call.
Best fit: AP leads, controllers and outside bookkeeping firms handling anywhere from a few hundred to about 10,000 invoice pages a month from many suppliers, who want the data in a Sheets or Excel register, QuickBooks or Xero without an ERP project or a developer on staff.
Limitations: Parseur handles invoice capture and data extraction. It doesn't log in to supplier portals, execute payments or provide per-field confidence scores.
Explore AI invoice processing, Google Drive data extraction, PDF to Google Sheets and PDF to Excel.
Nanonets
Nanonets combines invoice extraction with AP workflow features. It captures invoice data, PO references and line items, and offers rules-based validation with duplicate detection. Its documentation also covers general ledger (GL) coding and invoice approval workflows, and lists QuickBooks and Xero among its supported finance systems.
Best fit: AP teams that want extraction, coding, matching and approvals in one platform.
Limitations: matching and accounting workflows rely on reference data, business rules and system connections. If you only need invoices extracted into a spreadsheet, much of the broader AP functionality will go unused.
Docsumo
Docsumo is an IDP platform for financial documents, including invoices, credit notes and supplier statements. Its invoice workflow takes documents in by email, upload or API, classifies and splits them, and extracts header fields and line items. Docsumo then validates totals, vendor records, POs and duplicates, routes exceptions for review, and posts data through APIs and webhooks.
Best fit: AP teams that need configurable extraction, validation and exception handling across financial documents.
Limitations: getting data into a spreadsheet register or accounting system may take workflow or API configuration. The Business and Enterprise plans are quote-based, so confirm the integrations and plan features you need before implementation.
Best AP Automation Software
Extraction gets the data in. AP automation software decides who approves it, how it's recorded and when it gets paid. These tools earn their place when an AP team needs stronger financial controls and already uses an accounting system, although some work without one.
BILL
BILL combines vendor invoice capture with approvals and payments. Teams receive invoices by email or upload, review bills, authorize payments and sync accounting records with QuickBooks and Xero.
Best fit: AP teams on accounting software that want invoice approvals and vendor payments in one workflow.
Limitations: BILL is a full payables product, so it pays off when approvals and payments are a bottleneck too, not retyping alone. Automatic two-way sync with QuickBooks and Xero, and AI multi-line bill coding, start on the Team plan.
Ramp Bill Pay
Ramp Bill Pay manages bill intake, approvals, payments and accounting sync. Ramp's documentation describes syncing bills on approval and integrations with QuickBooks Online and Xero. It also offers a no-accounting mode, so an accounting connection isn't required for every workflow.
Best fit: finance teams that want bill approvals, payments and spend management together.
Limitations: how well bills sync depends on the connected accounting system, and payment availability varies by location. Confirm both for your setup.
Stampli
Stampli keeps the conversation on the invoice itself. Discussion, questions, approvals, documents and workflow history stay attached to it, and Stampli supports invoice coding, approval routing, PO matching and accounting system integrations.
Best fit: AP teams where invoice exceptions, departmental approvals and back-and-forth between stakeholders cause delays.
Limitations: Stampli's workflows are closely tied to accounting and ERP data. Without an established financial system, check the integration requirements before a trial.
Ottimate
Ottimate combines invoice capture, coding, approvals and vendor payments, including workflows across multiple locations. Its documentation describes invoice capture, GL coding and matching, and approval and export to accounting systems.
Best fit: multi-entity or multi-location finance teams that need invoice-level controls and coordinated AP workflows.
Limitations: if your AP runs entirely in spreadsheets, expect extra implementation work, because coding, matching and accounting sync depend on configured financial data and integrations.
RPA and Workflow Tools for Supplier Portals
Some suppliers will only hand over an invoice after you log in, click through three menus and hit download. RPA and workflow tools take over that kind of chore, along with moving files and routing extracted data. Paired with IDP, they are how teams automate supplier invoices from PDFs and portals together.
UiPath
UiPath automates browser tasks through UI Automation, including clicking, navigating and extracting information from websites. For AP, a configured robot can retrieve invoices from supplier portals and pass them to a document processing workflow. UiPath also offers Document Understanding for invoice extraction and Validation Station for human review.
Best fit: AP teams with substantial portal-based work and technical resources to build and maintain automation.
Limitations: portal workflows need maintenance when website layouts, login steps or access controls change. UiPath also takes more implementation work than a dedicated intake and extraction workflow.
Microsoft Power Automate With AI Builder
Microsoft Power Automate connects invoice intake, document processing and downstream actions across Microsoft applications. The AI Builder action "Extract information from invoices" captures invoice fields, and the prebuilt invoice processing model supports line items. Teams use Power Automate to route extracted data into Excel, SharePoint or approval flows. Parseur also offers a Power Automate integration for sending structured document data into Microsoft workflows.
Best fit: AP teams already in Microsoft 365 that want invoice processing connected to existing files, records and approvals.
Limitations: teams configure flows, field mappings and exception handling themselves. AI Builder usage depends on licensing and capacity.
A note on portal automation: multi-factor authentication, CAPTCHAs and supplier website redesigns can break automated downloads. Before you build a bot, ask each supplier for email delivery or a supported file feed. A five-minute email beats maintaining a bot.
Built-in Capture in Accounting Tools
If you already manage bills in QuickBooks Online or Xero, try what's in the box first. QuickBooks offers accounts payable automation, and Xero uses Hubdoc to extract document details and create transactions.
These features may be enough for straightforward invoices. For recurring documents from many suppliers, especially multi-page line items and varied layouts, test extraction completeness before deciding whether you need a dedicated IDP platform.
Comparison of AI Document Processing and AP Automation Tools
Here is how the tools line up on documents, intake, setup and fit, with or without an ERP. For OCR-focused tools, see best invoice OCR tools.
Document Processing and Intake
| Tool | Category | Documents | Line items | Intake |
|---|---|---|---|---|
| Parseur | IDP platform | Invoices, credit notes and statements as PDFs, scans, photos or email bodies | Table fields capture repeating line-item rows, including multi-page invoices | Email, upload, Google Drive, API |
| Nanonets | IDP + AP workflows | Invoices, plus prebuilt models for POs, receipts and bank statements | Description, product code, quantity, price and line amount | Email import, cloud storage integrations, API |
| Docsumo | IDP platform | Invoices, credit notes, statements | Header fields and line items, including multi-page tables | Email, upload, API |
| BILL | AP automation | Bills and vendor invoices | AI multi-line bill coding on the Team plan | Central inbox, OCR invoice capture, photo uploads |
| Ramp Bill Pay | AP automation | Invoices and vendor credit memos | Line items and line-item splits | AP email forwarding, drag-and-drop upload, CSV and Excel files, Ramp vendor network |
| Stampli | AP automation | Invoices from PDFs, Word documents and images | Line-level PO matching | Vendor email, drag-and-drop, vendor portal add-on, Amazon S3 virtual drive |
| Ottimate | AP automation | Invoices, with PO and receipt matching | Header and line-item data | Email, desktop, mobile, API upload |
| UiPath | RPA + document understanding | Invoices and credit notes | Description, quantity, unit price, line amount, part number, line number | Robot workflows, API calls, Document Understanding activities |
| Power Automate + AI Builder | Workflow + invoice extraction | Invoices | The prebuilt invoice model supports line items | Power Automate flow with a configured trigger or file input |
| QuickBooks Online | Accounting + bill capture | Bills and invoice files | Header fields such as dates, amounts and supplier (test line items) | File upload, email forwarding |
| Xero + Hubdoc | Accounting + document capture | Bills and receipts | Header fields such as supplier, amount, invoice number and due date (test line items) | Email, scanner, upload |
Workflow, Setup and Best Fit
| Tool | Works without an ERP? | Approvals and payments | Setup | Best fit |
|---|---|---|---|---|
| Parseur | Yes | Payments run in your accounting tool or bank | Configure extraction fields, validation and delivery | Varied supplier documents feeding an AP register |
| Nanonets | Yes, with Google Sheets, Excel, webhooks, QuickBooks and Xero listed | Review stages, rules and configured AP workflows | Configure document model and workflow | Extraction combined with AP controls |
| Docsumo | Yes, through API, webhooks and file exports | Exception routing on Enterprise workflows, payments downstream | Configure extraction, validation and delivery | Financial document extraction and validation |
| BILL | Yes, with QuickBooks and Xero sync (automatic two-way on Team and above) | Approval workflows plus ACH, card and check payments | Configure bill inbox, approvals and payment methods | Approvals and vendor payments |
| Ramp Bill Pay | Yes, no-accounting mode available | Bill approvals and payments, some approval conditions on Plus | Configure approval policies, payments and optional accounting sync | AP and spend management |
| Stampli | Needs an accounting tool or ERP integration | Approval routing and payment options | Configure accounting integration and approval workflows | Invoice collaboration and exceptions |
| Ottimate | Capture can start without an ERP, accounting export is part of the workflow | Approval and submission for payment | Configure vendors, coding, approvals and accounting export | Multi-location or multi-entity AP |
| UiPath | Yes, browser and app automation doesn't need an ERP | Human approval supported, payments need a configured integration | Configure UI Automation, Document Understanding and Validation Station | Supplier portal automation |
| Power Automate + AI Builder | Yes, Microsoft workflows run without an ERP | Approval flows need configuration, payments downstream | Create a flow and add invoice processing | Microsoft 365 finance operations |
| QuickBooks Online | Yes, QuickBooks is the accounting system | Review bills and schedule payments | Configure bill capture (availability varies by account) | Teams already using QuickBooks |
| Xero + Hubdoc | Yes, Xero is the accounting system | Publish documents to create transactions, pay bills in Xero | Connect Hubdoc to Xero and set publishing rules | Teams already using Xero |
Notes: features depend on plans, integrations and configured workflows. "Works without an ERP" doesn't mean a product works without accounting software. Best-fit descriptions are editorial assessments, not rankings or benchmark results.
Which Combination Fits Your Team?
Pick by bottleneck, not by feature list.
| AP bottleneck | Start with |
|---|---|
| Invoices arrive in many different layouts | IDP platform + Google Sheets or Excel AP register |
| Suppliers keep invoices in portals | Email notifications or RPA to collect PDFs for IDP |
| Approvals and payments cause delays | AP automation software + accounting tool |
| Your team works in Microsoft 365 | Power Automate + IDP |
| You're adopting an ERP | An ERP-centric AP suite such as Coupa or HighRadius, keeping IDP for document extraction |
Start with the row that costs your team the most hours, and add approval, payment or ERP capabilities only when the workflow outgrows what you have.
How to Check Extraction on Your Own Supplier Documents
Vendor sample invoices are picked to look good. Yours weren't. Most AP leads shortlist two or three platforms and run their own recent invoices through each before involving IT or booking a sales call.
- Select 30 to 50 documents: include invoices from different suppliers, multi-page line items, scans, credit notes and supplier statements.
- Check every field: compare supplier names, invoice numbers, dates, taxes, totals and individual line items against the originals.
- Test for duplicates: submit a known duplicate and see whether your AP register or downstream workflow flags it.
- Change a supplier layout: check whether the platform still extracts the right fields and how much adjustment it needs.
- Count the fixes: note how many documents reached your register with no correction, and how long the rest took to fix.
That last count is the number to compare across tools. For published results and test methods, see our AI invoice processing benchmarks.
Your Next Batch of Invoices Is the Test
AI document processing for accounts payable starts where your clerk does the same work twice. Parseur extracts structured data from supplier invoices and sends it to your AP register or accounting tool, without an ERP or a template for every supplier. Forward last week's supplier invoices to a Parseur mailbox and count how many need a fix. Then decide whether anyone on your team should spend another Friday typing them.
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