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Tool comparison

Kalender Sync vs. 2sync – Notion sync or calendar sync?

2sync is a Notion automation tool: it keeps Notion databases in sync with Google Calendar, Outlook, Todoist and other apps. Kalender Sync does something different – it syncs calendars directly with each other, no Notion in between. Here's the honest comparison.

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Background

What is 2sync?

2sync (formerly "Notion Automations") describes itself as a Notion automation tool that eliminates manual data entry between Notion and your other tools. Every sync runs between a Notion database and another app: Google Calendar, Outlook Calendar, Todoist, Google Tasks, Microsoft To Do, Google Sheets, Google Contacts, Outlook Contacts, plus Gmail and Outlook Mail (email one-way into Notion only). The Solo, Premium and Pro plans cost $7, $14 and $49 per month billed yearly and differ mainly in number of automations, sync interval (5, 3 or 2 minutes) and sync window. Every plan starts with a 14-day trial; there is no permanent free plan. 2sync is run by the French company TONOID SASU, hosted on Hetzner in the EU according to its privacy policy, and publishes a GDPR Art. 28 DPA.

Where 2sync is strong

Notion as your hub
If you plan tasks, projects and events in Notion databases, 2sync gives you two-way sync with Google Calendar and Outlook – changes in the calendar land in Notion and vice versa.
More than calendars
2sync also connects Notion with Todoist, Google Tasks, Microsoft To Do, Google Sheets, contacts and email. All integrations are included in every plan.
EU hosting and a published DPA
2sync is run by a French company, says it hosts on Hetzner in the EU and provides a GDPR Art. 28 DPA. For a Notion tool, that's solid.

Where Kalender Sync wins

Tap a point to see the reasoning.

  • Sync calendars directly with each other

    With 2sync, a Notion database is always involved – according to 2sync, even the Apple Calendar route goes through Notion. If you simply want to keep your work and personal calendars aligned, Kalender Sync needs no Notion: calendar A writes straight into calendar B.

  • Live sharing into other people's calendars

    Kalender Sync writes your availability directly into another person's calendar – your assistant, your team or your client. It stays up to date there automatically. That's a core feature of Kalender Sync, and not what 2sync is built for.

  • Three visibility levels – Free/Busy by default

    Per sync you choose: busy only, title + time, or full details. The default is "busy only" – event details only leave your calendar if you explicitly allow it.

  • One sharing free forever

    2sync offers a 14-day trial, then starts at $7/month (yearly) or $9/month (monthly). At Kalender Sync, one sharing is free forever on the Free plan (Google and Microsoft). Basic is €5/month (€50/year) with 3 accounts, 5 syncs and all providers.

  • German providers ready to connect

    Kalender Sync connects 10 provider types – Google, Microsoft Outlook/M365, Apple iCloud, GMX, WEB.DE, mailbox.org, Posteo, STRATO, Infomaniak kSuite and iCal feeds. GMX and WEB.DE come with a ready-made connection – no server address to type in.

  • German company, hosted in Germany

    Kalender Sync is run by PPJ Venture Labs UG and hosted at Hetzner in Germany. A DPA is included on every plan for business use – part of our terms.

  • Calendars for AI assistants

    Via the MCP connector, Claude and ChatGPT can read the calendars you share – with the same visibility control as your syncs.

When to pick which

2sync is the right choice when:

  • Notion is your central planning tool and events should live in Notion databases.
  • You also want to connect Todoist, Google Tasks, Microsoft To Do or Google Sheets with Notion.
  • You don't need calendar-to-calendar sync, but Notion ↔ calendar.

Kalender Sync is the right choice when:

  • You want to sync several calendars directly with each other – no Notion required.
  • You want to write your availability live into other people's calendars, with "busy only" as the default.
  • You want the broadest provider coverage in this comparison: 10 provider types – Google, Microsoft Outlook/M365, Apple iCloud, GMX, WEB.DE, mailbox.org, Posteo, STRATO, Infomaniak kSuite and iCal feeds. Kalender Sync is the only tool in this comparison with ready-made connections for the German providers GMX & WEB.DE – no server address to type in.
  • You want to start with one sharing that's free forever.
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Looking for calendar-to-calendar sync?

Connect your calendars in a few clicks – GDPR-compliant and hosted in Germany. 7 days of Professional free, no credit card.

Try free for 7 days

Currently supported providers

GoogleMicrosoftApple iCloudKKSuiteGMXWEB.DEmailbox.orgiCal-Feeds