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KsefInvoiceBillance
Free

Freeware with no subscription or per-document KSeF fees.

 Freemium

Free to start; details of paid plans are not given in the research.

Windows, Linux Linux
  • Sends and retrieves documents through KSeF
  • Handles invoices, corrections, receipts and multiple currencies
  • Creates XRechnung and ZUGFeRD to EN 16931
  • Converts existing PDF invoices into e-invoices
  • Interface is currently available only in Polish
  • Focused on Polish tax and e-invoicing systems
  • Interface and website are in German
  • Proprietary software
Downloadable app Downloadable app
Closed source Closed source
License: Freeware License: Proprietary
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 8, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.