Calendar Butler
For independent consultants and freelancers
Keep all your calendars in sync. No more double bookings.
If you work for several clients, you enter every appointment by hand into your other calendars. Calendar Butler takes that over.
- No API access needed
- No client data
- Live in under 15 minutes
Tuesday
Your appointmentAnonymous block
One appointment in any calendar. An anonymous block in all the others.
The price of independence
You know this ritual.
Sunday, 8 pm
You log in just to check the week. Not out of curiosity, but because you can't afford to be caught off guard on Monday.
Monday, 9:12 am
Your phone buzzes. A notification, a call, and in the same second the guilty thought: did something just slip in that I missed?
Tuesday
A client invites you to a slot that is already taken. Then the apology and the new proposals.
Always thinking back and forth between several calendars: that seems to be the price of independence. You stop paying it today.
Your time is money
Your time is too valuable for this.
Do you actually know how expensive this annoying, pointless task really is? Most consultants block around 15 minutes every day for calendar upkeep. That adds up:
- 15 minevery day
- 1.25 ha week
- 5 ha month
- 55 ha working year
That's well more than
a full working week spent
copying calendar entries
from A to B.
At an hourly rate of those 55 hours cost you
€6,600 a yearevery year. But your time is definitely too valuable for that.
Hire your Calendar Butler now!How it works
It couldn't be easier.
The entire sync runs exclusively through email: simple, robust, and without you having to worry about anything.
STEP 1
The invite comes in
You simply forward the invitation to your Calendar Butler as usual, or add it directly as a participant.
STEP 2
It reduces it to a block
It only reads out what it actually needs to reliably sync the event, and creates a completely new invitation from that. The original invitation is deleted immediately.
STEP 3
It syncs everywhere
The new invitation automatically goes out to all your linked calendars, for a single event or a recurring one. Reschedules and cancellations are taken care of independently.
What comes in
Your invitation
- Time
- Date
- Names
- Email addresses
- Event titles
- Attachments
Calendar Butler never reads or processes names, email addresses, event titles, or attachments.
What goes out
An anonymous block
- Time
- Date
Nothing else ends up in your other calendars.
Before you subscribe
The four questions everyone asks.
Does my client's IT have to approve anything?
No. Nothing is installed and nothing is connected on their side. You simply add Calendar Butler to an appointment as a participant, like anyone else.
What does Calendar Butler see?
Only time and date. Names, email addresses, event titles and attachments are never read or stored, and the original invitation is deleted right away.
How fast can I start?
In about 5–10 minutes. You get your personal access link right after subscribing, verify your calendar mailboxes with one click, and you're ready.
Is it secure?
Magic link instead of passwords, 2FA, anonymization and data deletion, regular security updates. Hosted in Germany and built on data minimization.
Where our clients work
Trusted where compliance matters most
Calendar Butler is designed specifically for the collaboration between large companies and external professionals. Its users work for companies such as these:
What people who use Calendar Butler say
That's exactly what I needed. Shut up and take my money 😉
It's so easy. I don't have to spend ages setting that much up. You can basically start working right away.
Awesome! It solves such an annoying problem, and no AI involved.
Calendar synchronization is such an annoying problem. If you hadn't invented your tool, I wouldn't know how to solve it.
Why it exists
I've been in project work for about 20 years, and I can't count how often I wished for a solution like Calendar Butler. There was no other way: I simply had to build it myself!Stephanie Selmer, Organizational Developer
Pricing
Simple pricing. Pick what fits you.
30 days free. Switch between plans anytime. Cancel anytime.
Single Subscription 'Essential'
- 2 linked calendars The calendars you connect — Calendar Butler never sees their contents, only where to send a notification.
- 150 syncs / month Each block or change Calendar Butler sends to a linked calendar counts as one sync.
- ✓ Video onboarding A short tutorial that gets you fully set up in minutes.
Single Subscription 'Pro'
- 5 linked calendars The calendars you connect — Calendar Butler never sees their contents, only where to send a notification.
- 500 syncs / month Each block or change Calendar Butler sends to a linked calendar counts as one sync.
- Everything in Essential, plus:
- ✓ Best Practice Guide Tips and tricks from experienced users, so you don't miss the obvious.
- ✓ Future Sync Move all future appointments into a brand-new calendar in one go — perfect for a new client. Counts as a single sync.
Single Subscription 'Unlimited'
- unlimited calendars The calendars you connect — Calendar Butler never sees their contents, only where to send a notification.
- unlimited syncs Each block or change Calendar Butler sends to a linked calendar counts as one sync.
- Everything in Pro, plus:
- ✓ Priority Support Get help via a live online meeting, usually within 24 hours.
- ✓ Early access to new features Try new Calendar Butler features before anyone else.
FAQ
Frequently asked questions
Questions about working with the Calendar Butler
Why should I use Calendar Butler instead of Calendly or a similar tool?
Calendar Butler solves a completely different problem than Calendly does. Calendar Butler is the right choice if you want to quickly and easily make your availability visible in various (customer) calendars.
On which platforms and with which tools does Calendar Butler work?
It doesn't matter whether you work on a Windows computer or a Mac, with Outlook, Google Calendar, Apple Calendar… Calendar Butler works reliably with all platforms.
Is working with Calendar Butler easy or secure?
Why choose between the two? We want both! Magic Link instead of passwords, 2FA, anonymization/data deletion, regular security updates and test automation, custom subject lines, calendar verification — not only make it easy for you, but also particularly secure.
Questions about setting up the Calendar Butler
How long does it take before I can start using Calendar Butler?
About 5–10 minutes, then you can start working with it right away: you'll receive your personal access link immediately after completing your subscription. Then verify your calendar mailboxes with a single click and you're ready to go.
How can I link my client calendars?
It's really easy: just enter the email address you use for your client in the Calendar Butler dashboard. With a single click, you can send a verification link to that email address. As soon as you click on it, your calendar is linked and synced with Calendar Butler.
Questions about Calendar Butler Features
What is a linked calendar?
In Calendar Butler, you can add your various calendars. Calendar Butler does not have access to these calendars; it only knows the email address and is instructed to send a notification there.
What is a sync?
A sync is the process by which Calendar Butler sends a block or a change to a linked calendar. Example: if you have linked three calendars (A, B, C) and send an event from calendar A to Calendar Butler, it creates and sends two blocks — two syncs.
What is Future Sync (available Q2/26)?
Future Sync lets you send all future appointments Calendar Butler has already delivered to you into a completely new calendar — especially useful when you acquire a new client. Future Sync counts as a single sync, regardless of how many appointments you sync.
What is a Video Onboarding?
To get started with Calendar Butler right away, you'll receive an onboarding tutorial that helps you set everything up in just a few minutes.
What is the Best Practice Guide?
In the Best Practice Guide, you'll get tips and tricks from people who have been using Calendar Butler for a while, so you don't end up saying later "if only I'd thought of that…"
What is Priority Support?
Priority Support assists you via online meeting, usually within 24 hours.
Questions about data privacy
Will my sensitive data be stored?
In order for Calendar Butler to support you, we only need your email addresses linked to your calendars. In addition, an anonymous ID is stored for each meeting so it can be changed later. That's all.
Do I have to share my customer's data?
We only need the email and calendar address you received from your customer, likely structured similarly to LASTNAME.EXTERNAL@CUSTOMER.COM. That is all we require.
What happens to the invitations Calendar Butler has received?
Invitations are deleted immediately after processing. Only individual anonymized information is retained so you can update your appointments later — a unique ID, date, time and duration.
Does my client's IT department need to activate my use of Calendar Butler?
No. Calendar Butler uses the same channel your client's IT department already monitors: calendar invitations via email. Even though Calendar Butler deletes all unnecessary data, always practice data minimization to protect your clients' internal information.