Best KOrganizer Alternatives in 2026
Updated
20 tools from calendar apps ranked against KOrganizer on the same published basis.
- 1KOrganizer vs Lark
- 2KOrganizer vs Calendar.com
- 3KOrganizer vs Microsoft Outlook Calendar
- 4KOrganizer vs TimeFinder
- 5KOrganizer vs Teamup
- 6KOrganizer vs Cozi
- 7KOrganizer vs TimeTree
- 8KOrganizer vs Tweek
- 9KOrganizer vs FlowSavvy
- 10KOrganizer vs Proton Calendar
- 11KOrganizer vs Reclaim AI
- 12KOrganizer vs Calendars by Readdle
- 13KOrganizer vs Amie
- 14KOrganizer vs Trevor AI
- 15KOrganizer vs EGroupware
- 16KOrganizer vs FamilyWall
- 17KOrganizer vs Google Calendar
- 18KOrganizer vs Fantastical
- 19KOrganizer vs Rise Calendar
- 20KOrganizer vs BlueMind
KOrganizer alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Lark | 9.2 | Free plan | — | Android, API, iOS, Linux, Mac, Web, Windows |
| 2 | Calendar.com | 9.1 | Free plan | $20/mo | Android, API, Browser, iOS, Web |
| 3 | Microsoft Outlook Calendar | 9.0 | Free plan | $1.67/mo | Android, iOS, Mac, Web |
| 4 | TimeFinder | 9.0 | Free plan | Free | Android, iOS, Mac, Web, Windows |
| 5 | Teamup | 8.9 | Free plan | $12/mo | Android, API, iOS, Web |
| 6 | Cozi | 8.9 | Free plan | $3.25/mo | Android, iOS, Web |
| 7 | TimeTree | 8.9 | Free plan | $3.75/mo | Android, iOS, Web |
| 8 | Tweek | 8.8 | Free plan | $4.17/mo | Android, iOS, Mac, Web |
| 9 | FlowSavvy | 8.7 | Free plan | — | Android, iOS, Web |
| 10 | Proton Calendar | 8.6 | Free plan | Free | Android, iOS |
| 11 | Reclaim AI | 8.6 | Free plan | $10/mo | Browser, Web |
| 12 | Calendars by Readdle | 8.6 | Free plan | $1.67/mo | iOS, Mac |
| 13 | Amie | 8.6 | Free plan | Free | iOS, Mac, Windows |
| 14 | Trevor AI | 8.4 | Free plan | $0.42/mo | Web |
| 15 | EGroupware | 8.4 | No | €21.90/mo | Web, Linux, Windows, Mac |
| 16 | FamilyWall | 8.4 | Free plan | $3.75/mo | Android, iOS, Web |
| 17 | Google Calendar | 8.3 | No | $7/mo | Android, iOS |
| 18 | Fantastical | 8.3 | Free plan | Free | iOS, Mac, Windows |
| 19 | Rise Calendar | 8.3 | Free plan | €10/mo | Android, iOS, Mac, Windows |
| 20 | BlueMind | 8.3 | Free plan | Free | Android, iOS, Linux, Mac, self-hosted, Web, Windows |
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Questions about KOrganizer alternatives
What is the best alternative to KOrganizer?
Lark, number 1 in calendar apps with a score of 9.2 out of 10. The others here: Calendar.com, Microsoft Outlook Calendar, TimeFinder and 16 more.
What is the best free alternative to KOrganizer?
Lark is the best-ranked alternative with a free plan. 18 of the 20 alternatives here publish a free plan on their own pricing pages.
Is there an open-source alternative to KOrganizer?
Yes: EGroupware.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.