Automate the matching on one remittance, free
The rules are fixed and visible: invoice number, then PO number, then the amount. Upload one remittance as a spreadsheet (CSV or Excel) and your open-invoice export. Remit Match matches every line and flags short pays, overpays, duplicates and lines it can't find. Your files are read in memory and not kept; only your email address is kept, for 7 days.