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New: Connect Claude & ChatGPT to your calendars – the AI assistant is here

Kalender Sync

For owners of multiple companies

Your companies know nothing about each other – from now on, your calendars do

You run two or more companies of your own, each with its own mail and calendar stack. Kalender Sync keeps them all in real-time sync – collisions between company A and company B are history, and no team sees more than it needs to.

Try free for 14 days No credit card required.
Business owner with multiple companies between two locations

Calendar sync for owners of multiple companies

How Kalender Sync helps across your companies

Every company its own stack – one shared schedule

Startup on Google, acquired business on Microsoft 365, private calendar on GMX? Kalender Sync connects the whole mix – including iCloud, WEB.DE and kSuite – and keeps every company and personal calendar in real-time sync. Even two Outlook accounts from two companies come together cleanly.

Discretion between your teams

The team at company A only sees "busy" for an appointment at company B – with a custom label like "Booked externally" if you want. You set the visibility per sync. GDPR-compliant, hosted in Germany – clean towards both workforces.

GDPR compliant Made & hosted in Germany

Your assistant plans reliably

The assistant at company A sees your real availability – without any insight into what's happening at company B. No follow-up questions, no double-bookings, no manual reconciling between companies.

Book in any company, up to date everywhere

Two-way sync (Basic and up): no matter which calendar an appointment lands in, all the others follow in real time. Even with strict IT, a shared calendar link is enough (iCal feed, Business plan – as an import in your direction). And each company simply counts as one account – Basic covers 5, Business unlimited.

Ready to run all your companies from one schedule?

Try free for 14 days

Currently supported providers

Google Microsoft Apple iCloud KKSuite GMX WEB.DE mailbox.org iCal-Feeds

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