Ashampoo Office
Ownership: Privately held
Pricing: €90 one-time. Use on up to 5 devices.
Known for: German office suite. Write (word), Calculate (sheets), Present (slides). Microsoft Office file compatibility including Office 365 and Office 2021. Choice of classic toolbar or modern ribbon interface. PDF export with embedded fonts. Strong one-time-payment alternative for households and small offices that refuse the subscription model. Five-device licence is generous.
https://www.ashampoo.com/en/office-9
Calligra Suite
Ownership: Privately held
Pricing: Free. Open source.
Known for: Open-source office and graphics suite from the KDE community. Words (text), Sheets, Stage (presentations), Plan, Karbon (vector), Krita (raster). GPL/LGPL licensed. Linux only. Linux-only. Mainly for KDE diehards. LibreOffice is the better default for most users, but Calligra has a more design-focused angle for creative work.
https://calligra.org
LibreOffice
Ownership: Privately held
Pricing: Free. Open source.
Known for: Full office suite from the German non-profit The Document Foundation. Writer (word), Calc (sheets), Impress (slides), Draw (vector), Base (database), Math (formulas). Native OpenDocument format, reads and writes Microsoft Office files. MPL v2 licensed. The reference open-source office suite. If you're not actively collaborating on docs in real-time, this is the right default.
https://www.libreoffice.org
SoftMaker Office NX
Ownership: Privately held
Pricing: Home license €29.90/year. Professional and NX Universal tiers available.
Known for: German commercial office suite, 30+ years in development. TextMaker, PlanMaker, Presentations. Native Microsoft Office file compatibility — edit .docx, .xlsx, .pptx directly without conversion. Windows, Mac, Linux, iOS, Android. The best Microsoft Office file compatibility in the European market. Pick this when you need to swap .docx files daily with Microsoft-Office colleagues.
https://www.softmaker.com