Calendar sync service from Germany
GermanyEUOpen sourceFree plan Ownership reviewed, controller unresolvedHigh non-EU dependencyScope verdict
This service remains visible for context, but it is not counted or recommended as a European-controlled option.
Operational dependency warning
Current public evidence shows 5 non-European infrastructure or email dependencies across 4 providers: Amazon SES, Amazon Web Services, Google, Stripe. The reviewed operational path is therefore not entirely European.
fruux is a calendar service from Germany. It keeps calendars in sync between your devices over CalDAV, the open standard supported by Apple, Android and desktop calendar clients, and the CalDAV server behind the service is open source.
The company is German, so fruux is a European alternative for calendar sync, although the service itself is hosted on AWS rather than on European infrastructure. It suits individuals and small teams that want standards based sync without tying their calendar to one ecosystem.
Data and operations
Verified operational dependencies, shown separately from ownership and from the service's core data hosting.
Public website
Why this matters
This public website route ends on Amazon Web Services, whose European seller is wholly owned by Amazon.com, Inc. An EU region can provide European data residency but remains under US ultimate ownership. DNS does not reveal the AWS region, the core service's host, or use of the separately operated AWS European Sovereign Cloud.
Incoming business email
Why this matters
Published MX records route incoming business email through Google Workspace. Correspondent details and message content can therefore enter this non-European provider's systems; MX does not reveal the configured storage region.
Authorised outbound email
Why this matters
This domain authorises Google Workspace to send email. If active, recipient details and message content can be processed by this non-European provider. SPF does not reveal its configured storage region.
Authorised outbound email
Authorised outbound email
Why this matters
This domain authorises Stripe to send email. If active, recipient details and message content can be processed by this non-European provider. SPF does not reveal its configured storage region.
Authorised outbound email
Why this matters
This domain authorises Amazon SES, infrastructure under US ultimate ownership, to send email. If active, recipient details and message content can be processed there. SPF does not prove active use, the selected AWS region, or use of the separately operated AWS European Sovereign Cloud.
Switzerland
