Document data extraction guides
Plain answers to the questions teams ask when they automate documents: what extraction is, how to read invoices at volume, what a confidence score tells you, and what to do when a vendor changes its layout.
- What is document data extraction?Document data extraction turns PDFs and scans into structured fields. How OCR, IDP, extraction APIs and LLM parsing differ, and how to choose between them.
- Invoice data extractionWhat invoice data extraction should return, why line items are the hard part, where it sits in accounts payable, and what to test in an invoice extraction API.
- Confidence scoresWhat a confidence score in document extraction means, how to set thresholds per field, when to send values to human review, and why null beats a guess.
- Vendor layout changesWhy a sender changing their form breaks document extraction, how to detect a layout change early, how to handle it, and what to ask your extraction vendor.
- Best document extraction APIsA sourced guide to the best document data extraction APIs in 2026: who each suits, where it runs and what it costs. Written by docRefinery, limits included.
- On-premises extractionWhat on-premises and air-gapped document extraction really mean, the options available today, how to evaluate them, and the questions to ask every vendor.
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