Mindee provides ready-made APIs for common documents like invoices, receipts and IDs, returning typed fields out of the box, plus a studio for training custom document types. If your documents fit those templates, that's convenient.
pdftojson takes the general approach: send any PDF and get clean structured data back in five formats, with a reconciliation check for bank statements and a free in-browser tool.
Where pdftojson is different
If your documents are exactly invoices, receipts or IDs, Mindee's typed APIs give you named fields with no setup, and that's genuinely handy. pdftojson is the better fit when your documents vary, or when you want the raw structured data across formats rather than a fixed field set.
For bank statements it also reconciles the transactions against the opening and closing balances and flags any that don't add up, which a field extractor won't catch.