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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
    Google Calendar AndroidiOS $7/mo9.8
    Proton Calendar vs Google Calendar
  2. 2
    Microsoft Outlook Calendar AndroidiOSMacWeb $1.67/mo9.7
    Proton Calendar vs Microsoft Outlook Calendar
  3. 4
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo9.6
    Proton Calendar vs Calendar.com
  4. 5
    Nextcloud Calendar AndroidiOS €3.50/mo9.5
    Proton Calendar vs Nextcloud Calendar
  5. 6
    Teamup Free plan AndroidapiiOSWeb $12/mo9.5
    Proton Calendar vs Teamup
  6. 7
    Zoho Calendar AndroidiOS 9.4
    Proton Calendar vs Zoho Calendar
  7. 8
    Notion Calendar Free plan AndroidiOS Free9.4
    Proton Calendar vs Notion Calendar
  8. 9
    Lark Free plan AndroidapiiOSLinuxMac 9.4
    Proton Calendar vs Lark
  9. 10
    Tuta Calendar Free plan AndroidiOS €3/mo9.3
    Proton Calendar vs Tuta Calendar
  10. 11
    Cozi Free plan AndroidiOS $3.25/mo9.3
    Proton Calendar vs Cozi
  11. 12
    Fantastical Free plan iOS Free9.3
    Proton Calendar vs Fantastical
  12. 13
    FlowSavvy Free plan AndroidiOSWeb 9.3
    Proton Calendar vs FlowSavvy
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