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Calendar sync and AI scheduling for all your calendars

With Ridian you sync calendars and contacts, schedule with your AI agent and share availability with clients. Your data stays yours.

Try it free →Start with WhatsApp

7-day free trial · No credit card required

ChatGPT
ChatGPT ⌄
Ridian · Checking calendars …

Yes, book TuesdayThursday instead
+Ask anything↑
Recent activity
Today

  • Claude is connected to your calendar

  • Nextcloud · Sports club was connected

  • “Parents’ evening” shows as busy in Outlook

  • Your sync is set up: iCloud → Outlook

Sync
Google · personal
iCloud · Family
Outlook
3 calendars · active last: just now
Works with all
major providers
GoogleMicrosoftApple iCloudNextcloudGMXWEB.DEmailbox.orgkSuitePosteoStrato

What Ridian does for you. Calendar and contact sync, scheduling and sharing, right inside the agent you already work with.

Keep
in sync with every provider.
Sync events, contacts and to-dos. No more double bookings, and your availability is current everywhere.

Full control over what gets shared.

For each connection, you decide whether a calendar sees only “busy”, title and time, or every detail.

Busy onlyTitle & timeEverything
BusyClient meetingClient meeting · Meyer & Co.Thu 4:00 to 5:00 PMThu 4:00 to 5:00 PMThu 4:00 to 5:00 PM · Hafenstraße 12

Syncing calendars has never been easier.

Control everything in Ridian through Alvin, the Ridian agent, or through your own agent via MCP. Or connect your calendars visually on the canvas.

Mirror my Google to Outlook, busy only.↑
GoogleWork
OutlookClient
Busy only

Run your workday with .
Schedule meetings, answer invites, find free time, right inside the agent you already use.

The secure way to give agents access to your calendar.

Every agent gets exactly the permissions you grant: read, create or edit.

ChatGPTyour access
Read calendar
Create events
Edit events
Delete events

Everything is traceable.

See every action your agents take and pause access in one click. Your syncs keep running.

Created “Call with Meyer”ChatGPT · 9:42 AMUndo
Moved “Proposal”Claude · 9:10 AMUndoRestored
Synced Google to Outlook4 events · 8:55 AMUndo
ChatGPTActivePaused · Syncs keep running

Give
its own email address.
Your assistant sends and answers email without access to your own mailbox. Set up in minutes, right in the chat.

Your assistant gets its own inbox.

It receives and sends mail, reads attachments and pulls out what matters, without access to your private mailbox.

Club botOwn inbox
↓ReceivedMembership · the Öztürk familyCourt 3 · Mr LangeTrial session · Anna Krüger123
⌗Data extractedTrial sessionSaturdayBeginner
↑DraftReply to Anna✓
No access to your private mailbox

Your own domain as sender.Soon

Connect a domain you own and your assistant writes as info@tc-greenwhite.com, for example. Ridian checks the DNS records for you.

Custom domaintc-greenwhite.com
SPFDNS recordCheckingVerified
DKIMDNS recordCheckingVerified
DMARCDNS recordCheckingVerified
Senderinfo@tc-greenwhite.comOffLive

What your agent can do with it.

A dedicated address. Clear tasks. You choose the permissions.

Sign in without switching inboxes

Your agent receives verification emails and sign-in codes in its own inbox and uses them for the sign-in you requested.

Mailbox read access and your agent’s browser tools

Invoices in one clear overview

Forward receipts to your agent. It creates a reviewable overview of senders, amounts and due dates.

Receiving and attachments; analysis by your agent

Respond to inquiries faster

Give a project its own contact address. Your agent organizes inquiries and prepares replies for review.

Drafts and sending after claim and MCP authorization

From email to a booked meeting

Connect mailbox and calendar. Your agent finds free times, prepares proposals and creates the confirmed event.

Separate mailbox, sending and calendar permissions

Your agent acts on your request. For automated workflows, connect events or webhooks to your own agent system.

Explore Agent Mailbox →

Up and running in three steps.

Set everything up yourself, or tell your agent how your syncs should work.

Made in Germany. Secure for teams worldwide.

GDPR compliant
Hosted in Europe
ISO 27001 certified partners
Modern encryption
No training on your data
DPA for business use
Go to Compliance Center →

Common
questions

Ask the Agent
Answers from the Ridian docs
Online

Or go straight to the docs →

Ridian keeps your calendars, contacts and to-dos in sync across every provider and connects them to the AI agents you work with. You decide what goes where.

Google Calendar, Microsoft 365 and Outlook, Apple iCloud and CalDAV providers such as Nextcloud, GMX, WEB.DE, mailbox.org, kSuite, Posteo and Strato. Ridian syncs contacts and to-dos with Google and Microsoft.

Only as much as you want. For every connection you choose whether a calendar sees “busy” only, title and time, or all details.

Yes. Combine Outlook and Google in one share, for example. The person sees everything in their own calendar, and you can end the share at any time.

Assistants with MCP support such as Claude or ChatGPT. They only see the calendars and actions you allow, and you can revoke access at any time.

Every action is in your log. Undo it with one click or pause the agent. Your syncs keep running.

Yes. For business use, for example as a freelancer or self-employed professional, you'll find the DPA in the Compliance Center. The application, database and backups run in the EU region Ireland.

Try Ridian free for 7 days, no credit card required. See our pricing page for current plans.

Coming soon

Build with diff0.
Unified scheduling infrastructure for your software.

Access Beta →

Ready for calendar sync and AI scheduling with your agent?

Start 7-day free trial →

No credit card required