Description
Harold turns messy supplier invoices and documents into clean, validated, import-ready data for any ERP or accounting system, whether modern or legacy such as Sage, WinMan, Pegasus, and Syspro. Built for UK SMEs, it goes beyond simple extraction by validating data before it reaches your systems, catching mistakes like wrong VAT, incorrect totals, or bad supplier IDs the moment they appear. You train Harold once per supplier, and it then extracts structured data from every future invoice automatically.
Harold's flow is upload or email a document, have Harold extract headers, totals, line items, and references, run validation rules that flag or fix issues, and export or auto-send the clean data via CSV, Excel, ERP, or a Zapier flow. It uses AI vision models that handle machine-generated PDFs, scanned PDFs, image-based PDFs, and photo uploads. A powerful rules engine adds output templates, supplier profiles that map each supplier's labels to your columns, a layout trainer, column matching, GL code assignment, formulas, IF rules for validation, and Zap Gates that block a document from firing downstream until failed checks are fixed, with a full audit trail.
Harold connects to your ERP via Zapier with no developer required, working with Xero, QuickBooks, Sage, FreeAgent, Oracle, SAP Business One, Airtable, and thousands of other apps, and delivers clean structured JSON on approval. Documents that fail validation are held in a human review queue rather than silently passed, and Harold learns from corrections to improve over time. Pricing is month-to-month with no contract, starting at £29/month (Standard) with a Founder rate for early supporters and higher tiers for larger volumes.
Harold's Core Features
AI extraction of headers, totals, and line items from invoices and documents
Validation rules engine that flags or fixes wrong totals, missing fields, and bad supplier IDs
Train once per supplier with supplier profiles and a layout trainer
Output templates, column matching, GL code assignment, and formulas
Automated email inbox processing with a unique Harold address
Zapier integration and CSV/Excel export to any ERP with no developer
Zap Gates that block bad documents from reaching downstream systems, with an audit trail
Human review queue for flagged documents, with the model learning from corrections
How to use Harold?
Upload or email: Drop documents in or send them to your unique Harold inbox.
Train per supplier: Provide a few sample invoices so Harold learns each supplier's layout and field labels.
Set rules: Define output templates, validation rules, GL codes, and Zap Gates for how data should be checked.
Export or auto-send: Review flagged documents, then export as CSV/Excel or auto-send clean data to your ERP via Zapier.
Harold's Use Cases
- Legacy ERP integration
- Accounts payable automation
- Purchase order processing
- Email-based document intake







