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Best Microsoft Outlook Calendar Alternatives in 2026

12 apps from calendar apps ranked against Microsoft Outlook Calendar on the same published basis.

  1. 1
    Mozilla Thunderbird Free plan Open sourceAndroidLinuxMacWin Free9.0
    Microsoft Outlook Calendar vs Mozilla Thunderbird
  2. 3
    Lark Free plan AndroidapiiOSLinuxMac 8.2
    Microsoft Outlook Calendar vs Lark
  3. 4
    EGroupware Free trial Open sourceWebLinuxWinMac €21.90/mo8.2
    Microsoft Outlook Calendar vs EGroupware
  4. 5
    Proton Calendar Free plan AndroidiOS Free8.0
    Microsoft Outlook Calendar vs Proton Calendar
  5. 6
    Teamup Free plan AndroidapiiOSWeb $12/mo8.0
    Microsoft Outlook Calendar vs Teamup
  6. 7
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo8.0
    Microsoft Outlook Calendar vs Calendar.com
  7. 8
    Notion Calendar Free plan AndroidiOS Free7.9
    Microsoft Outlook Calendar vs Notion Calendar
  8. 9
    Doodle Free plan Web $11/mo7.8
    Microsoft Outlook Calendar vs Doodle
  9. 10
    Tuta Calendar Free plan AndroidiOS €3/mo7.8
    Microsoft Outlook Calendar vs Tuta Calendar
  10. 11
    Cozi Free plan AndroidiOS $3.25/mo7.8
    Microsoft Outlook Calendar vs Cozi
  11. 12
    TimeTree Free plan AndroidiOS $4.49/mo7.8
    Microsoft Outlook Calendar vs TimeTree
  12. 13
    Reclaim AI Free plan extensionWeb $0.83/mo7.8
    Microsoft Outlook Calendar vs Reclaim AI
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