What do I need?
The vendor’s statement and your own list for that vendor, as CSV or Excel. Each needs an invoice number and an amount.
Find what is different between a vendor’s statement and your records.

Add both files and every line is compared for you, even when invoice numbers are written differently.
The vendor’s statement and your own list for that vendor, as CSV or Excel. Each needs an invoice number and an amount.
INV-00123, inv 123 and #123 are treated as the same invoice.
No. They are read in your browser and never leave your computer.