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Rechnungs-Assistent

Rechnungs-Assistent is an invoicing program, available on Linux.

  • Completely free
  • Linux
  • Open source

At a glance

All of Rechnungs-Assistent is free: no feature is locked behind a paid plan, and its code is open.

Its licence (GPL-3.0+) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

The fast and efficient invoice generator for craftsmen, self-employed and SMEs. To create invoices more quickly, customers and articles can be conveniently saved for the future. Existing customer or article tables can be easily imported: Because both databases are saved in .csv format and can be edited with any spreadsheet editors like Libre Office Calc. An invoice can be generated within a few seconds. Once all your own data has been filled in, Once all your data has been filled in, you can generate attractive invoices with automatic generation of the invoice number in no time at all.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Official plan pages (pricing, licence, terms) (commercial use) —
  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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