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How Invoice Navigator compares
Validation is a solved problem. Every ERP, validator and gateway can tell you an invoice is non-compliant. The gap is what happens next.
| Dimension | Free validators | ERP built-in | Compliance consultancies | Peppol providers | Invoice Navigator |
|---|---|---|---|---|---|
| What they do | Show errors | Basic format checks | Manual review | Transport invoices | Check, add the missing details you confirm, check again, hand you the protocol |
| Missing details | Flags them | May default silently | Audit report | Rejects at delivery | Asks you for them and enters them; never assumes |
| Structural errors | Listed | Limited to own templates | Recommendations in a report | None | Error report for your ERP support: rule, position in the file, expected structure. Free. |
| Amounts, line items, taxes | — | No guarantee | — | — | Never changed |
| Re-check | Manual re-upload | None | — | — | KoSIT validator after every change |
| Proof | Validation report only | Minimal | Snapshot report | Transport receipts | Check protocol: validator, ruleset, time, SHA-256, public /verify link. No invoice content. |
| Integration | Manual upload or CLI | Inside one ERP | Offline | API; validation is a side feature | Browser, no account; REST API for software vendors |
Most tools in this space solve one part of the problem. Validators check syntax. ERPs generate invoices. Peppol providers deliver them. Consultancies review edge cases in reports.
None of them close the loop. When a validator flags a missing buyer reference or a wrong unit code, the invoice goes back to the source system — or into a manual queue. Multiply that by hundreds of invoices across several country profiles and you have a pipeline problem.
Invoice Navigator sits between the export and the recipient. It checks the file with the KoSIT validator, asks you for the mandatory details that are missing, enters them, checks again and hands you the protocol. Amounts, line items and taxes are never touched. Structural errors are sent back to the invoicing system with an error report — that is the honest outcome, not a fix.
For software vendors the same loop is available as a REST API: API for software vendors.
Have an e-invoice that came back rejected? Check it here.
Checking is free. The first verified download every 30 days is free. After that €1.90 per invoice, or €9 a month for all of them.