Best BusyCal Alternatives in 2026
Updated
20 apps from calendar apps ranked against BusyCal on the same published basis.
- 1BusyCal vs Mozilla Thunderbird
- 2BusyCal vs Microsoft Outlook Calendar
- 3BusyCal vs Lark
- 4BusyCal vs EGroupware
- 5BusyCal vs Proton Calendar
- 6BusyCal vs Teamup
- 7BusyCal vs Cozi
- 8BusyCal vs Calendar.com
- 9BusyCal vs TimeFinder
- 10BusyCal vs Notion Calendar
- 11BusyCal vs TimeTree
- 12BusyCal vs Fantastical
- 13BusyCal vs Doodle
- 14BusyCal vs Tuta Calendar
- 15BusyCal vs Reclaim AI
- 16BusyCal vs FlowSavvy
- 17BusyCal vs Musubi
- 18BusyCal vs Samsung Calendar
- 19BusyCal vs Trevor AI
- 20BusyCal vs Calendars by Readdle
BusyCal alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mozilla Thunderbird | 9.0 | Free plan | Free | Android, Linux, Mac, Windows |
| 2 | Microsoft Outlook Calendar | 8.2 | Free plan | $1.67/mo | Android, iOS, Mac, Web |
| 3 | Lark | 8.2 | Free plan | Android, API, iOS, Linux, Mac, Web, Windows | |
| 4 | EGroupware | 8.2 | €21.90/mo | Web, Linux, Windows, Mac | |
| 5 | Proton Calendar | 8.0 | Free plan | Free | Android, iOS |
| 6 | Teamup | 8.0 | Free plan | $12/mo | Android, API, iOS, Web |
| 7 | Cozi | 8.0 | Free plan | $3.25/mo | Android, iOS, Web |
| 8 | Calendar.com | 8.0 | Free plan | $20/mo | Android, API, Browser, iOS, Web |
| 9 | TimeFinder | 8.0 | Free plan | Free | Android, iOS, Mac, Web, Windows |
| 10 | Notion Calendar | 7.9 | Free plan | Free | Android, iOS |
| 11 | TimeTree | 7.9 | Free plan | $3.75/mo | Android, iOS, Web |
| 12 | Fantastical | 7.9 | Free plan | Free | iOS, Mac, Windows |
| 13 | Doodle | 7.8 | Free plan | $11/mo | Web |
| 14 | Tuta Calendar | 7.8 | Free plan | €3/mo | Android, iOS |
| 15 | Reclaim AI | 7.8 | Free plan | $10/mo | Browser, Web |
| 16 | FlowSavvy | 7.8 | Free plan | Android, iOS, Web | |
| 17 | Musubi | 7.8 | Free plan | Free | Android, iOS, self-hosted, Web |
| 18 | Samsung Calendar | 7.7 | Free plan | Free | Android |
| 19 | Trevor AI | 7.7 | Free plan | $0.42/mo | Web |
| 20 | Calendars by Readdle | 7.7 | Free plan | $1.67/mo | iOS, Mac |
Make your app an alternative to BusyCal
See the priceThe sponsored alternative slot on this page is labelled Sponsored.
Questions about BusyCal alternatives
What is the best alternative to BusyCal?
Mozilla Thunderbird, number 1 in calendar apps with a score of 9.0 out of 10. The others here: Microsoft Outlook Calendar, Lark, EGroupware and 16 more.
What is the best free alternative to BusyCal?
Mozilla Thunderbird is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.
Is there an open-source alternative to BusyCal?
Yes: Mozilla Thunderbird, EGroupware.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.