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Best Proton Calendar Alternatives in 2026

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

  1. 1
    Microsoft Outlook Calendar AndroidiOSMacWeb $1.67/mo9.4
    Proton Calendar vs Microsoft Outlook Calendar
  2. 2
    Lark Free plan AndroidapiiOSLinuxMac 9.3
    Proton Calendar vs Lark
  3. 3
    Google Calendar AndroidiOS $7/mo9.2
    Proton Calendar vs Google Calendar
  4. 4
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo9.1
    Proton Calendar vs Calendar.com
  5. 6
    Teamup Free plan AndroidapiiOSWeb $12/mo9.0
    Proton Calendar vs Teamup
  6. 7
    Notion Calendar Free plan AndroidiOS Free8.8
    Proton Calendar vs Notion Calendar
  7. 8
    Nextcloud Calendar AndroidiOS €3.50/mo8.8
    Proton Calendar vs Nextcloud Calendar
  8. 9
    Reclaim AI Free plan extensionWeb $0.83/mo8.8
    Proton Calendar vs Reclaim AI
  9. 10
    FlowSavvy Free plan AndroidiOSWeb 8.8
    Proton Calendar vs FlowSavvy
  10. 11
    Zoho Calendar AndroidiOS 8.7
    Proton Calendar vs Zoho Calendar
  11. 12
    Tuta Calendar Free plan AndroidiOS €3/mo8.7
    Proton Calendar vs Tuta Calendar
  12. 13
    Cozi Free plan AndroidiOS $3.25/mo8.7
    Proton Calendar vs Cozi
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