Stop keying invoices. Start automating them.
Harold handles the full invoice processing workflow — from supplier email to structured ERP data — with validation rules that catch errors before they reach your accounting system.
Start free — no card requiredWhat Harold automates
Save 8–14 hours of manual entry per week
The average SME finance team spends over 8 hours a week keying invoice data. Harold eliminates that entirely. Invoices arrive, get processed, get validated, and land in your accounting system without anyone touching a keyboard for data entry.
Validation rules stop bad data at the source
Automating invoice entry without validation just automates your mistakes. Harold's Rules Engine checks every invoice before it leaves the system — maths checks, required fields, supplier name matching, date normalisation. Flag it for review or block it entirely.
Train once per supplier, process forever
Harold learns each supplier's invoice format individually. Upload examples once and Harold extracts correctly for every future invoice from that supplier. No reconfiguration when layouts change — Harold flags the diff and updates from your corrections.
Clean data goes straight to your ERP via Zapier
Harold connects to over 5,000 apps through Zapier — Xero, QuickBooks, Sage, FreeAgent, Oracle, SAP Business One, Airtable, Google Sheets, or anywhere else. No developer required. Set up the workflow once and invoices flow automatically.
The automated invoice workflow
Supplier sends invoice to your Harold inbox
Suppliers CC your Harold email address. Nothing changes for them — they send invoices the same way they always have. Harold receives the document, identifies the supplier, and queues it for processing automatically.
Harold extracts every field
Using AI trained on your supplier's specific invoice format, Harold extracts header fields (supplier, invoice number, date, totals, VAT) and line items (description, quantity, unit price, line total) — clean, structured, and ready to validate.
Rules engine validates the data
Your validation rules run automatically. Does VAT equal 20% of net? Do line totals sum correctly? Is the supplier name in your approved list? Anything that fails gets flagged in your review queue — not silently passed downstream.
Clean data lands in your accounting system
Approved invoices export as CSV or fire a Zapier webhook — pushing clean structured data directly to Xero, QuickBooks, Sage, or wherever you need it. The whole flow from receipt to posting takes seconds, not hours.
Automate your invoice processing today
From £29/month. Set up your first supplier automation in under 10 minutes. No contract, no card required to start.
From £29/month after trial. Cancel anytime.