Purchase Order OCR API Pricing: Credits, Pages and Documents Compared

Purchase order OCR APIs are priced on three different units, and the unit matters more than the list price. Mindee and Parseur bill one credit per physical page. Docparser bills one credit per document of up to five pages. Nanonets bills per block run inside a workflow. A 40 page purchase order therefore costs 40 credits on Mindee, 8 on Docparser, and a variable number on Nanonets. Compare page counts from a real month of orders before you compare monthly prices.

Every shortlist in this category starts the same way: someone opens four pricing pages, lines up the monthly figures, and picks the cheapest. That comparison is close to meaningless, because the four vendors are not selling the same unit. One counts pages, one counts documents, one counts steps in a workflow, and the difference between them on the same stack of purchase orders can run to several times the cost either way.

Below is what each vendor publishes as of September 2026, checked on the vendor's own pricing page rather than a roundup, followed by the arithmetic that actually decides which one is cheaper for you. If you want to skip the comparison and just see your own purchase order come back as columns, you can upload one and get the spreadsheet without signing up for anything first.

What each vendor charges, and what it charges for

The billing unit column is the one to read first.

Two of those rows deserve a second look. Docparser's credit covers a whole document as long as it runs to five pages or fewer, which is the most generous unit on the list for short multi page orders and the reason its $39 entry plan is not really comparable to a $44 one. Nanonets moved to a workflow model where you are billed per step: simple operations run $0.02, standard AI $0.10, and complex AI $0.30 per run. A pipeline that classifies, extracts, then validates is three runs per document, not one.

How much does purchase order OCR cost per page?

There is no single per page rate, because only two of these vendors bill by the page at all. Mindee states that the number of credits is determined by the total number of physical pages submitted, regardless of document type or file format, and Parseur states that one credit equals one page processed. Docparser bundles up to five pages into one credit, and Nanonets does not count pages at all. Any article quoting a flat industry per page rate is comparing units that do not match.

Which pricing model is cheapest for purchase orders?

It depends entirely on the shape of your documents, and the effect is large enough to reverse a decision. Take one 40 page purchase order, the kind a distributor sends with a long item table and a page of terms attached:

Now flip it. Two hundred single page purchase orders in a month costs 200 credits on Docparser, which overruns the 100 credit Starter plan and pushes you to Professional at $74 a month. The same 200 pages barely dents Mindee's smallest 6,000 credit bundle at $44, and sits well inside a 2,500 page allowance. Per document pricing rewards long documents and punishes high counts. Per page pricing does the reverse.

So the useful exercise is not reading pricing pages. It is opening last month's folder of purchase orders, counting the documents and the total pages, and running both numbers. Teams that have never counted are usually wrong about which way their own volume leans, because a handful of long orders from one large customer can dominate a page total that everyone assumed was flat.

Do these vendors charge for pages that are not purchase orders?

Generally yes, and it is worth checking before you commit. If a per page vendor counts every page you submit, then cover sheets, terms and conditions, blank reverse sides from a duplex scan, and the fax banner page all consume credit at the same rate as a page carrying line items. Mindee's rule is explicit that the count is physical pages regardless of document type, so a scanning workflow that staples extra paper to the front of every order is quietly paying for it. Splitting or trimming files before submission is the cheapest optimization available in a per page model, and it does nothing at all in a per document one.

This is the same arithmetic that makes long financial documents expensive to process anywhere. A thirty page bank statement run through a per page extractor costs thirty times a single page, which is why format specific tools that convert a PDF bank statement straight into QuickBooks tend to price by statement rather than by sheet.

What about the free tiers?

They are not equivalent, and the difference is time against volume. Parseur publishes a free tier of 20 pages a month that renews. Nanonets gives $50 in credits with no card required, which is a one off balance rather than a recurring allowance. Mindee runs a 14 day free trial with no credit card, so the constraint is the calendar rather than the page count. PurchaseOrders.io gives 25 pages free with no card and no expiry date.

The practical consequence: if your purchase orders arrive in a batch at month end, a trial measured in days may close before a representative sample of layouts has even arrived. A recurring page allowance suits lumpy volume better, and a one off credit balance suits a concentrated evaluation where you test everything in one sitting.

Is a cheaper per page rate worth building the integration?

This is the cost most comparisons leave out entirely. Every vendor here returns structured data, but returning data and finishing the job are different things. Mindee returns JSON with official client libraries for Python, Node.js, Java, .NET, Ruby and PHP, plus Zapier and Make connectors. Turning that into a spreadsheet a bookkeeper opens, or a row in an accounting system, is work somebody does and maintains.

At small volumes that engineering time dwarfs the subscription. A few days of developer time to build and test an integration costs more than a year of any plan on this page, and it recurs quietly every time a vendor changes a layout or an API version moves. If you have engineers and several document types, that investment is sound and a general API is the right shape. If purchase orders are the only document type and nobody is free to build anything, a tool that exports Excel natively removes the line item entirely. The head to head detail on that trade is in our Mindee alternative comparison, and the wider field is in best purchase order OCR software.

Which vendor should I actually shortlist?

Sorted by the situation rather than by price:

• Long multi page orders, modest document counts: a per document model like Docparser's is structurally in your favor, provided your layouts are stable enough for its template approach.
• High counts of short orders: a per page model wins, and Mindee's 6,000 credit entry bundle absorbs a lot of volume for $44.
• Many document types, in house engineers: a general document AI platform, because breadth and custom field definition are what you are paying for.
• Purchase orders only, no developer: a PO specific tool, because the integration you are not building is the largest real cost.
• Enterprise AP with matching and workflow: a platform rather than an extractor, covered in our Rossum comparison.

Whichever way it lands, do the page count first. It is twenty minutes of work and it is the only input that reliably changes the answer. Once you know the destination, the route matters more than the rate: getting the extracted data into your books is covered in purchase order to QuickBooks and how to import purchase orders to your ERP, and developers who want JSON should read the purchase order API documentation.

Last updated September 2026. All prices are taken from each vendor's own published pricing page and verified on 6 September 2026. Vendors change pricing without notice, so confirm current terms before purchasing.