Teamup vs Tuta Calendar

Teamup Calendar is a cloud-based group calendar for organizing schedules, resources and teams. It offers 12 views, including year and table formats, and nine permission levels. Calendars can be shared through links without requiring recipients to have accounts. Events support custom fields, images and file attachments, and can also be shared as individual event pages. Teamup lists integrations including its API, iCalendar feeds, Slack, Microsoft Teams, Trello and Zapier; it provides iOS and Android apps and one-way calendar sync. The free plan allows five sub-calendars and five users. Paid plans start at $12/mo billed yearly, with a 3-day trial. Teamup says it is ISO/IEC 27001 certified and compliant with EU GDPR, and describes encryption for connections, stored data and backups. Its production services are hosted on AWS, with user content redundantly stored in Oregon and Ireland. Private-server hosting is unavailable.

Tuta Calendar organizes appointments, business meetings, and repeating tasks across Android, iOS, Linux, macOS, web, and Windows. It supports shared calendars with read-only, read-and-write, or write-and-manage-sharing access. Calendar events, invitations, sharing, and push reminders are described as end-to-end encrypted. Users can send and receive invitations, including password-protected encrypted invitations to external users. Imported calendars sync automatically across devices, while the listed calendar sync type is one-way. Tuta says reminders are hidden from the phone operating system and can arrive offline. The calendar is integrated with Tuta email and contacts. Security features include two-factor authentication; Tuta also describes its clients as open source and its calendar as using zero-knowledge architecture. The Free plan includes one calendar. Revolutionary costs €3 a month, billed monthly, and Legend costs €8 a month, billed monthly; both include unlimited calendars. Tuta is made by Tutao GmbH, based in Hannover, Germany, and founded in 2011.