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 Proton Calendar Alternatives in 2026

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

  1. 1
    Calendar.com Free plan AndroidapiextensioniOSWeb $20/mo9.1
    Proton Calendar vs Calendar.com
  2. 2
    Microsoft Outlook Calendar AndroidiOSMacWeb $1.67/mo9.0
    Proton Calendar vs Microsoft Outlook Calendar
  3. 3
    Lark Free plan AndroidapiiOSLinuxMac 8.9
    Proton Calendar vs Lark
  4. 4
    Teamup Free plan AndroidapiiOSWeb $12/mo8.9
    Proton Calendar vs Teamup
  5. 5
    EGroupware Free trial Open sourceWebLinuxWinMac €21.90/mo8.8
    Proton Calendar vs EGroupware
  6. 6
    Google Calendar AndroidiOS $7/mo8.7
    Proton Calendar vs Google Calendar
  7. 7
    FlowSavvy Free plan AndroidiOSWeb 8.7
    Proton Calendar vs FlowSavvy
  8. 9
    Reclaim AI Free plan extensionWeb $0.83/mo8.6
    Proton Calendar vs Reclaim AI
  9. 10
    CalendarBridge AI Scheduling Assistant Free trial AndroidiOSWeb $4/mo8.5
    Proton Calendar vs CalendarBridge AI Scheduling Assistant
  10. 11
    TimeFinder Free plan WebWinMaciOSAndroid Free8.4
    Proton Calendar vs TimeFinder
  11. 12
    Nextcloud Calendar AndroidiOS €3.50/mo8.3
    Proton Calendar vs Nextcloud Calendar
  12. 13
    Fantastical Free plan iOS Free8.3
    Proton Calendar vs Fantastical
Make your tool an alternative to Proton Calendar

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

See the price