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Mozilla Thunderbird vs Sidekick Scheduling

Mozilla Thunderbird

9.0 #1 in Calendar apps

About Mozilla Thunderbird

Sidekick Scheduling

6.6 #76 in Calendar apps

About Sidekick Scheduling
Mozilla ThunderbirdSidekick Scheduling
Free planYesYes
Free trialYes
Paid fromFree
Open sourceYes
PlatformsAndroid, Linux, macOS, WindowsAndroid, iOS, Web
Free planYesYes
Mobile appsAndroid
App coverageEmail, calendar, contacts, and tasks
Unified inboxYes
Offline accessYes
Scheduled sendingYes
Calendar toolsYes
Calendar supportgoogle
Invitee messagingYes
Team schedulingYes
Scheduling channelsemail

Listed together in Best Calendar Apps