Kalendarius - GDPR-compliant appointment scheduling and calendar management software interface
Smart Appointment Scheduling · Real-Time Calendar Sync · EU-Hosted (Hetzner Germany)

Manage your bookings with zero effort.
Let clients & participants choose the perfect time.

Share your personal booking link and cut scheduling decision time from days of emails down to 30 seconds. Instant 2-way sync with Google & Outlook, automated reminders, and zero double-bookings.

kalendarius.com/

No credit card required · Free plan included · 2-minute setup · EU-Hosted (Hetzner Germany)

Interactive preview — Experience how easily your clients & participants will book with you:

Designed to give you total control over your schedule

Everything you need to eliminate back-and-forth emails, delight your clients & participants, and manage appointments effortlessly.

Manage All Bookings in One Place

Take complete control of your schedule. Create custom meeting types (15-min intros, 45-min consultations, panel interviews), set buffer times between calls, and manage your availability from an intuitive dashboard.

Clients & Participants Book in 30 Seconds

Give clients, candidates, and guests the smoothest booking experience. No apps to install and no account required for guests. Real-time availability automatically adjusted to their local timezone.

Cut Decision Time & End Email Ping-Pong

Stop losing clients and candidates to slow email chains. Lock in appointments immediately while interest is hot, streamline your pipeline, and reclaim 4–5 hours of wasted scheduling time every week.

Real-Time 2-Way Sync & Zero Double-Bookings

Seamlessly syncs with Google Calendar and Microsoft Outlook. If an event moves on your calendar, your booking slots update instantly. Automated reminders keep no-shows to near zero.

Browser extension

Share from your inbox

The Kalendarius extension puts a Schedule button right inside Gmail and Outlook, so you can share your booking link without leaving the email you're writing.

Works where you write

A Schedule button appears in the Gmail and Outlook Web compose bar — including Microsoft 365 work accounts.

Every event type, one click

Pick any of your booking links — a 15-minute intro or a 30-minute consultation — and copy it into your email instantly.

Private by design

Minimal permissions, no tracking, and your emails are never read. Just like the rest of Kalendarius.

Coming soon to Chrome & Edge

New message

To:mario.rossi@studiolegale.it
Quick call next week?

Happy to walk you through it — pick any time that suits you:

kalendarius.app/book/intro-call
SendSchedule

Share booking link

30 Minute Call

30 min

Copy

Intro Meeting

15 min

✓ Copied

How Kalendarius works

From calendar connection to confirmed appointments in three simple steps — zero back-and-forth emails.

1

Connect your calendar in 10 seconds

Sync your Google or Microsoft Calendar with one click. We automatically detect your busy slots so you never get double-booked.

2

Share your personalized booking link

Send your link via email, WhatsApp, LinkedIn, or embed it on your website. Clients and participants pick an open slot that suits them best.

3

Get booked & automated reminders

The meeting appears instantly on both calendars with video conference links (Google Meet or Teams) and automated reminders sent to both parties.

Pricing that grows with you

Anyone on your team can connect their calendar for free. Only people who create booking links pay — so cost scales with the work, not your headcount.

Monthly
Annual

Personale

Free

For solo users

  • 1 Organizer
  • 15 meetings / month
  • 1-on-1 meetings
  • Google & Microsoft sync
  • 1 event type
  • 1 booking link
  • Email confirmations
Get started free

Professionista

€5.90/month

For solo consultants & freelancers

  • 1 Organizer
  • Unlimited meetings
  • Custom branding
  • Up to 5 event types
  • Up to 5 booking links
  • Reminders & follow-ups
  • Sync log
  • Advanced Analytics
Choose plan

Team

Recommended
€9.90/organizer/month

For active HR & SME teams

  • Up to 25 Organizers
  • Unlimited meetings
  • Unlimited booking links
  • Invite unlimited free coworkers
  • Round-Robin lead distribution
  • Collective panel interviews
  • Centralized Team Dashboard
Choose plan

Business

€17.90/organizer/month

For growing companies, PA & healthcare

  • Unlimited everything
  • SSO / SAML
  • Audit log & retention controls
  • Signed DPA + Art. 9 consent
  • AgID-compliant hosting
Choose plan

All prices include VAT.

Enterprise / Sovrano

Ministries, large hospitals, banks. Dedicated EU tenant or on-prem, DPO support, custom retention, fattura elettronica via SDI, priority SLA, custom integrations.

Built for organizations where data sovereignty matters

GDPR Article 9

Special-category data (health, HR) stays on EU infrastructure, ready for the most sensitive workflows.

ACN-Ready

On the roadmap toward Italian public-sector cloud qualification, designed with national compliance in mind.

European Jurisdiction

Fully European ownership and operations keep your data under EU jurisdiction (hosted in Germany, Hetzner ISO 27001).

Frequently asked questions

Everything you need to know before you switch.

On EU-sovereign infrastructure in Germany (Hetzner data center parks in Nuremberg and Falkenstein, ISO 27001 certified), GDPR-native by design. Special-category data (health, HR) covered under GDPR Article 9 is supported for the most sensitive workflows — healthcare, legal, and public administration included.