EverythingXiaomi
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 app
Vendor dashboard

Best Mozilla Thunderbird Alternatives in 2026

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

  1. 1
    Microsoft Outlook Calendar AndroidiOSMacWeb $1.67/mo9.4
    Mozilla Thunderbird vs Microsoft Outlook Calendar
  2. 2
    Lark Free plan AndroidapiiOSLinuxMac 9.3
    Mozilla Thunderbird vs Lark
  3. 3
    Google Calendar AndroidiOS $7/mo9.2
    Mozilla Thunderbird vs Google Calendar
  4. 4
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo9.1
    Mozilla Thunderbird vs Calendar.com
  5. 5
    Proton Calendar Free plan AndroidiOS Free9.0
    Mozilla Thunderbird vs Proton Calendar
  6. 6
    Teamup Free plan AndroidapiiOSWeb $12/mo9.0
    Mozilla Thunderbird vs Teamup
  7. 7
    Notion Calendar Free plan AndroidiOS Free8.8
    Mozilla Thunderbird vs Notion Calendar
  8. 8
    Nextcloud Calendar AndroidiOS €3.50/mo8.8
    Mozilla Thunderbird vs Nextcloud Calendar
  9. 9
    Reclaim AI Free plan extensionWeb $0.83/mo8.8
    Mozilla Thunderbird vs Reclaim AI
  10. 10
    FlowSavvy Free plan AndroidiOSWeb 8.8
    Mozilla Thunderbird vs FlowSavvy
  11. 11
    Zoho Calendar AndroidiOS 8.7
    Mozilla Thunderbird vs Zoho Calendar
  12. 12
    Tuta Calendar Free plan AndroidiOS €3/mo8.7
    Mozilla Thunderbird vs Tuta Calendar
Make your app an alternative to Mozilla Thunderbird

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

See the price