You love it?
Your team will, too.
Your customers even more.
The only ones who won’t like it
are your competitors.
Fact check.
Each interruption costs time. Studies show that manual calendar synchronization often takes 7–10 minutes per operation. This includes:
- the interruption itself
- logging into other environments
- checking calendars
- blocking time in other calendars
- getting back into the flow of the original task.
We’ve made a very conservative estimate of the benefits of Calendar Butler: we’ve allocated just 1.5 minutes for each sync operation.
Your team of [···] employees, that receives about [···] calendar invitations per month, needs [···] hours of manual work. That's worth [···] per year. With a subscription of [···], you're looking at a payback of [···] months.
Hidden problems
The biggest problems, however, remain hidden for a long time, and their consequences are difficult to quantify in monetary terms.
Damaged Reputation
Your clients booked your top-tier services and expected a seamless collaboration. What they got were delayed responses, last-minute rescheduling, and the occasional missed meeting.
No one complained outright. They simply stopped recommending you.
Friction Losses
Every calendar invitation your team receives means someone has to interrupt their actual work, open three different calendar systems, manually check them, and finally respond. Forty times a month, per person.
That’s no small matter. Those are hours of interrupted, fragmented work.
Talent Retention
Your best people didn't sign up to manage calendars. They signed up to do great work.
When pointless admin fills their days, they quietly check out before they officially leave. And replacing top talents costs up to 1.5 times their annual salary.
How it works.
It couldn't be easier:
Team Setup
After purchasing, you can easily add your entire team via CSV upload and invite them with a single click to apply their individual settings.
Individual Settings
The users configure their own access and link their client project calendars via e-mail-based registration verification and a customizable subject line.
You can monitor the progress anytime.
Start working
They simply forward incoming invitations to their Calendar Butler account or invite them directly when they create appointments themselves.
Calendar Butler generates block invitations that do not include appointment details or attendee information. Only the date, time, and anonymous subject line are sent.
Our customers and their clients
Calendar Butler users typically work with large, often internationally operating companies and groups. Data security is a fundamental requirement for businesses of all sizes.
However, these companies have one more thing in common: External professionals often only have access to the content and contacts they need to work with via a company laptop or a VPN connection.
Calendar Butler is designed specifically for this type of collaboration between companies and professionals. So for example, Calendar Butler users work for companies such as these:
That's exactly what I needed.
Walther Geuder,
Shut up and take my money 😉
Project Manager
It's so easy. I don't have to spend ages setting that much up. You can basically start working right away.
Marianna Gulli,
Project Manager
Awesome! It solves such an annoying problem that I keep running into. And no AI. I don't even have to turn anything off.
Oliver Briede,
Requirements Engineer
Calendar synchronization is such an annoying problem.
Sina Kistner,
If you hadn't invented your tool, I wouldn't know how to solve it.
Project Specialist
I never would have thought it would be so relaxing. I have three clients at the same time. Keeping my calendars up to date has always been a pain. I’m only now realizing just how much of a hassle it was.
Peter Schoele,
Project Manager PMI
Corporate Features.
Unlimited Calendars
Link as many calendars as each seat needs.
Unlimited Syncs
Send unlimited invites, reschedules or cancellations.
Future Sync
One-click-sync for future appointments to a new calendar.
GDPR Compliance
Hosted in Germany and works with minimal data.
Privacy by Design
No shared information and only individual subjects.
Team Onboarding
Onboarding Workshop for an optimal Adoption Rate.
Best Practice Guide
Access the experience of the entire user community
Admin Onboarding
Onboarding to ensure a hassle-free technical start.
Admin Dashboard
Overview of all seats, usage, syncs, and real-time reporting.
Flexible Billing
Pay by invoice or credit card, whatever works for your finance team.
Pricing.
| Seats | € / Seat / Year | € / Seat / Month |
|---|---|---|
| 3 - 9 | 299 | 31 |
| 10 - 24 | 269 | 28 |
| 25 - 49 | 229 | 24 |
| 50 - 99 | 199 | 21 |
| 100 - 249 | 169 | 18 |
| 250 + | 139 | 15 |
Frequently asked questions.
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 for you 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.
How long does it take before I can start using Calendar Butler?
It takes about 5-10 minutes, then you can start working with it right away: You will 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 will be linked and synced with Calendar Butler.
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 changes to a linked calendar.
Example: If you have linked three calendars (A, B, and C) and send an event from Calendar A to Calendar Butler, it creates and sends two blocks, resulting in two syncs.
What is Future Sync (available in Q2/26)?
Future Sync is a feature that allows you to send all future appointments that Calendar Butler has already delivered to you to a completely new calendar. This is especially important when you acquire a new client and want to link a new calendar.
Important: 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 will help you set everything up in just a few minutes.
What is the Best Practice Guide?
In the Best Practice Guide guide, you'll get tips and tricks from developers and professionals who have been using Calendar Butler for a while. So you won't end up saying later, “If only I'd thought of that…”.
What is the Priority Support?
Priority Support will assist you via Onlinemeeting usually within 24 hours.
What is the 'Conscious' Community?
Your time is worth more than can be expressed in an hourly or daily rate.
That’s why “Conscious — The Community for professionals ready to design their work life” shares the best ideas, tips, and tricks. We engage in open discussions in a safe environment, treating each other as equals, and regularly seek fresh perspectives from outside sources through top speakers, trainers, and coaches.
Will my sensitive data be stored?
In order for Calendar Butler to support you, we only need a few details from you: your email addresses that are linked to your various calendars. In addition, an anonymous ID is stored for each meeting so that 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. It is likely structured similarly to LASTNAME.EXTERNAL@CUSTOMER.COM. That is all we require.
What happens to the invitations that Calendar Butler has received?
Invitations are deleted immediately after processing. Only individual anonymized information is retained so that you can update your appointments later.
This includes information such as a unique ID for the appointment, the date, the time, and the duration of the appointment.
Does my client's IT department need to activate my use of Calendar Butler?
No. Calendar Butler uses the same channels that your client's IT department monitors closely: calendar invitations via email.
But even though Calendar Butler deletes all unnecessary data, always remember to practice data minimization to protect your clients' internal information.