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KSeF Guard vs KSeFka
KSeFka is a desktop application for issuing, sending, and receiving invoices through KSeF. KSeF Guard is a pre-submission validator. They serve different roles — here's how they compare.
Note: The official Ministry of Finance tool for KSeF is Aplikacja Podatnika KSeF 2.0, available at ksef.podatki.gov.pl. KSeFka (ksefka.com) is a separate third-party desktop application. KSeF Guard does not replace either tool — it is a complementary pre-submission quality assurance layer that validates invoices before they enter the KSeF pipeline.
| Feature | KSeF Guard | KSeFka |
|---|---|---|
| Privacy & Security | ||
| Data privacy | Validation runs offline — invoice data stays local | Offline desktop app |
| Offline / air-gapped | Yes — validation runs offline. License, payments, updates may connect. | Yes — runs offline |
| No telemetry | Verified — no analytics, no tracking | — |
| Validation Depth | ||
| Catches beyond KSeF | 107 rules beyond KSeF (55 legal)↗ | — |
| Validation rules beyond XSD | 128 with source-backed evidence↗ | XSD validation only |
| KSeF API conformance tested | 256 invoices, 0 false negatives (conformance v9)↗ | — |
| Legal source provenance | SHA-256 verified quotes from VAT Act↗ | — |
| XSD schema validation | Full libxml2 | Yes |
| Smart fix hints | Bilingual problem + fix per rule | XSD error messages |
| Workflow & Reporting | ||
| Batch processing | 5,000 files/day (Standard), unlimited (Pro) | Single file |
| PDF audit report | White-label PDF with legal chain | No |
| Export formats | TXT, CSV, JSON, PDF | None |
| Rule configuration | Per-rule enable/disable, YAML profiles | No |
| CLI for CI/CD | Exit codes 0–130, JSON output | No |
| Bilingual interface | Polish + English | Polish only |
| Price & Access | ||
| Entry price | Free (10 files/day) | Free |
| Unlimited usage | €89/month (Pro) | N/A |
| Platform | Windows desktop + CLI (Linux CLI) | Desktop (Windows, macOS, Linux) |
| Open source | No — SHA-256 verified rule provenance | No |
| Product status | Available | Released |
✓ yes · ✗ no · — unknown or not tested
Conformance v9 methodology: 256 test invoices submitted to KSeF test API 2.3.0 on 2026-05-25. Results: 0 false negatives, 98 false-positive fixtures (94 active rules, plus 4 from inactive rules). Including 12 additional rules verified by static analysis and batch testing, KSeF Guard validated 107 rules beyond KSeF API, of which 55 are legal requirements.
Comparison based on publicly available information as of May 2026. We strive for accuracy — contact [email protected] if any claim needs correction.