Invoice OCR that actually understands invoices.
Harold goes beyond character recognition. AI extraction trained per supplier, validation rules that catch errors, and Zapier delivery to your accounting system — all in one workflow.
Start free — no card requiredWhy invoice OCR alone is not enough
OCR reads characters — not meaning
Traditional OCR converts pixels to text. It has no concept of what "VAT" means, which column is the unit price, or whether the total makes sense. It hands you a wall of text and leaves the structure problem to you.
Template-based OCR breaks on layout changes
Most OCR tools use fixed templates — anchor zones that tell the system where to look for each field. When a supplier redesigns their invoice, the template breaks. Someone has to reconfigure it manually.
OCR with no validation passes bad data downstream
OCR that sends data straight to your accounting system is dangerous. A mis-read figure becomes a wrong journal entry. A missing VAT code causes a return error weeks later. Without validation, extraction accuracy becomes a liability.
How Harold handles invoice extraction
AI extraction, not character recognition
Harold uses AI vision models to understand invoice structure — not just read characters. It identifies fields by meaning and context, not pixel position. This means it handles scanned documents, unusual layouts, and multi-page invoices that defeat standard OCR.
Supplier training for consistent accuracy
Harold learns each supplier's format individually. Train once on a handful of real invoices and Harold extracts correctly for every future document from that supplier — with accuracy that improves over time from your corrections.
Validation rules before the data leaves Harold
Before any data reaches your accounting system, Harold's Rules Engine runs your checks — maths validation, required field checks, supplier name matching, date format normalisation. Bad data is flagged for human review, not silently passed on.
Clean data delivered via Zapier
Validated invoice data exports as CSV, Excel, or structured JSON delivered to any Zapier-connected system — Xero, QuickBooks, Sage, Airtable, or anything else. No developer required.
Start extracting invoices accurately
From £29/month. Train Harold on your first supplier in under 10 minutes. No contract, no card required.
From £29/month after trial. Cancel anytime.