Tool comparison

Kalender Sync vs. SyncDate – which EU sync fits you?

SyncDate is one of the few competitors that, like us, hosts in Germany and works privacy-first – fast and with broad CalDAV support. We won't make it easy on ourselves: here's an honest look at where SyncDate is strong and where Kalender Sync makes the difference.

Try free for 7 days See the SyncDate view

Background

What can SyncDate do?

SyncDate is a young sync tool from DUMA DIGITAL SOLUTIONS S.R.L. (a Romanian company) that hosts in Germany at Hetzner and positions itself as GDPR-compliant and privacy-first. It synchronises Google Calendar, Microsoft Outlook, iCloud and any CalDAV server (including Fastmail, Infomaniak, mailbox.org, Posteo, Nextcloud) and reads iCal feeds. For Google and Outlook the sync runs via webhooks in near real time; CalDAV and iCal sources are polled periodically. Events show up as „Busy" by default, with titles and details optionally copied per sync. Distinctive extras include a cross-device unified calendar view and an MCP endpoint for AI agents.

Strengths

Where SyncDate is strong

Very fast synchronisation

For Google and Outlook, SyncDate works over webhooks and reflects changes within seconds. If raw speed between the big providers is your priority, you get it here.

Broad CalDAV and EU-provider coverage

Beyond Google, Outlook and iCloud it connects to any CalDAV server – including Fastmail, Infomaniak, mailbox.org, Posteo and Nextcloud. For EU mail ecosystems outside the big three, that's a genuine strength.

EU hosting & privacy-first – like us

SyncDate hosts at Hetzner in Germany, is GDPR-compliant and shows events as „Busy" by default. Honestly, that's the same foundation as Kalender Sync – a US-vs-EU argument doesn't apply here.

Free plan and AI access (MCP)

There's a permanently free tier, paid plans from €7.42/month (billed yearly) and an MCP endpoint that lets AI assistants read your calendar. A thoughtful, modern tool.

Where Kalender Sync wins

A German company, not a foreign entity

Kalender Sync is run by PPJ Venture Labs UG (haftungsbeschränkt) in Munich – a German company under German law, with German-language support, a legal notice and a commercial-register entry. SyncDate hosts in Germany, but the operator itself is a Romanian S.R.L. For DACH compliance, works-council agreements and trust, having your contractual partner in-country is a real difference.

A DPA with a German contractual partner

A data processing agreement is part of the Kalender Sync offering – included in the Professional plan, available on request for Free and Basic – and you sign it with a German company under German law. SyncDate also publishes a public DPA at syncdate.app/dpa – the contracting party there, however, is a Romanian S.R.L. If tax advisors, law firms or schools need a tangible in-country contractual partner, that's us.

Genuine live-sharing into other calendars

SyncDate mainly keeps your own accounts in sync. Kalender Sync can additionally embed your availability into another person's calendar by invitation – they accept, and from then on everything stays synced automatically. That sharing flow is a core feature for us.

Three visibility levels per sharing – with custom display names

You decide per sync whether only „Busy", „Title + time" or full details are transferred – and you can even set the name a blocked slot shows up as on the other side. Fine-grained control designed for sharing with third parties.

A tangible partner for business use

SyncDate is a very young product built by a small team with email support. Behind Kalender Sync stand a public team, a legal notice with a commercial-register entry, German-language support and a public roadmap. When your calendar is business-critical, it counts to have a counterpart you can reach and assess.

A free plan with a 6-month sync range

Both tools offer a permanently free plan with no credit card, but cut differently: SyncDate gives you a sync covering one month (14 days back), Kalender Sync a sharing. Syncing your own calendars starts on Basic at €5/month and then reaches 6 months ahead. If you plan further than four weeks out, that is the range you need.

Decision guide

When should you pick which?

SyncDate is the right choice if:

You want to connect many CalDAV providers (Fastmail, Posteo, Nextcloud …).
Maximum sync speed between Google and Outlook matters most to you.
You want a lean self-sync tool with AI/MCP access.
A very young tool from a small team is no problem for you.

Kalender Sync is the right choice if:

You need a German contractual partner with a DPA and German-language support.
You serve regulated industries and must satisfy works-council agreements.
You want to share your availability live into other people's calendars – not just sync your own accounts.
You're betting on a product with a public team and a German commercial-register entry.
You want to connect GMX or WEB.DE without tinkering: Kalender Sync is the only tool in this comparison with dedicated one-click GMX & WEB.DE integrations – no manual CalDAV setup with server addresses and app passwords. 8 provider types in total: Google, Microsoft Outlook/M365, Apple iCloud, GMX, WEB.DE, mailbox.org, Infomaniak kSuite and iCal feeds.

Ready for calendar sync with a German contractual partner and a DPA?

Connect your calendars in a few clicks – GDPR-compliant, hosted in Germany, with genuine live-sharing.

Try free for 7 days

Currently supported providers

GoogleMicrosoftApple iCloudKSuiteGMXWEB.DEmailbox.orgiCal-Feeds