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Rechnungs-AssistentInvoicePlane
Free

Free and open source under the GPL-3.0-or-later license.

 Free

Free and open source, with no paid tier.

Linux Web, Self-hosted
  • Stores customer and item details for reuse
  • Imports and exports data as CSV
  • Covers quotes, invoices, payments and client records in one place
  • EU-compliant eInvoice support
  • Designed for German invoicing
  • Available for Linux
  • Requires running and securing your own server
  • Project and task management is basic
Downloadable app Self-hosted
Open source Open source
License: GPL-3.0-or-later License: MIT
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 2, 2026

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