Calendar.com vs Proton Calendar

Calendar.com brings calendars, scheduling, contacts, analytics, and automation together in a service for individuals and teams. It supports shared calendars, two-way sync, time blocking, and booking links with time-zone-aware availability. Users can schedule one-on-one, group, round-robin, multi-host, and one-off meetings, and teams can coordinate through shared availability and booking-routing rules. Connections include Google, Outlook, iCloud, Exchange, CalDAV, and native calendars. More than 40 integrations are listed for automation; video options include Zoom, Microsoft Teams, Google Meet, Webex, and GoTo Meeting. The service is available on the web, iOS, Android, through an API, and as Chrome and Edge extensions. Individuals can use it free forever. Standard is $20 a month for up to 10 users, and Pro is $30 a month for up to 30. Enterprise has custom pricing and is described for teams of 30 or more. Teams can try it for 14 days; annual billing advertises a 20% saving.

Proton Calendar is a calendar service for managing events, invitations, and recurring schedules on Android and iOS. Event titles, descriptions, locations, and invited people are protected with end-to-end or zero-knowledge encryption. A free Proton account costs nothing and allows up to 3 calendars. Paid Proton Mail plans allow up to 25 calendars, with calendar sharing by link to other calendar services on the web. Users can send invitations and add events from Proton Mail; appointment scheduling updates availability and adds confirmed meetings. The service supports scheduling links and video meetings, and notifications can arrive through desktop browsers or mobile devices. Calendar import and export are available on paid plans. Subscriptions purchased through proton.me renew automatically, and users can switch plans at any time; upgrades receive prorated credit. Proton is incorporated and headquartered in Switzerland and follows Swiss privacy laws.