Specifiction
For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
List your tool
Vendor dashboard

Best Mozilla Thunderbird Alternatives in 2026

12 tools from calendar apps ranked against Mozilla Thunderbird on the same published basis.

  1. 1
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo9.1
    Mozilla Thunderbird vs Calendar.com
  2. 2
    Microsoft Outlook Calendar AndroidiOSMacWeb $1.67/mo9.0
    Mozilla Thunderbird vs Microsoft Outlook Calendar
  3. 3
    Lark Free plan AndroidapiiOSLinuxMac 8.9
    Mozilla Thunderbird vs Lark
  4. 4
    Teamup Free plan AndroidapiiOSWeb $12/mo8.9
    Mozilla Thunderbird vs Teamup
  5. 5
    EGroupware Free trial Open sourceWebLinuxWinMac €21.90/mo8.8
    Mozilla Thunderbird vs EGroupware
  6. 6
    Google Calendar AndroidiOS $7/mo8.7
    Mozilla Thunderbird vs Google Calendar
  7. 7
    FlowSavvy Free plan AndroidiOSWeb 8.7
    Mozilla Thunderbird vs FlowSavvy
  8. 8
    Proton Calendar Free plan AndroidiOS Free8.6
    Mozilla Thunderbird vs Proton Calendar
  9. 9
    Reclaim AI Free plan extensionWeb $0.83/mo8.6
    Mozilla Thunderbird vs Reclaim AI
  10. 10
    CalendarBridge AI Scheduling Assistant Free trial AndroidiOSWeb $4/mo8.5
    Mozilla Thunderbird vs CalendarBridge AI Scheduling Assistant
  11. 11
    TimeFinder Free plan WebWinMaciOSAndroid Free8.4
    Mozilla Thunderbird vs TimeFinder
  12. 12
    Nextcloud Calendar AndroidiOS €3.50/mo8.3
    Mozilla Thunderbird vs Nextcloud Calendar
Make your tool an alternative to Mozilla Thunderbird

The sponsored alternative slot on this page is labelled and never changes the order above.

See the price