About Sdui

Sdui simplifies communication and organisation at schools and day care centres. The platform’s purpose is to connect teachers, educators, parents and children with each other through smart functions. Using Sdui reduces the administrative workload and frees up time for the essential mission of the institutions: providing the best possible education. Sdui offers GDPR-compliant solutions, with functions such as chat, video calls, cloud, timetable or translations, that are specifically tailored to the needs of schools and daycare centres.

The Sdui Group was founded in 2018 as a GmbH (limited liability company) in Koblenz (Germany) and is now one of the fastest-growing startups in the German EdTech industry. As a reliable partner, it guides educational institutions as well as responsible authorities and ministries through the digitalisation process and develops the operating system for digital schools and daycare centres.

With currently 170 employees, the Sdui Group is represented in Germany, Belgium and Switzerland as well as four other European countries. A total of around 10,000 educational institutions currently use the platform (as of January 2023).


Sdui continues to grow –
we now have 170 employees.

2500 +
Schools and daycares

10,000 & daycare centres in Germany and Europe already rely on Sdui.


The Sdui Group is represented in Germany, Austria, Belgium, Spain, Italy, Switzerland and Turkey.

1 Mio. €

Sdui has already received 25 million euros of investment.

Empower humans to
transform education for a
better tomorrow.



Why does Sdui exist and why does it make sense that we do our job every day? Our purpose gives a clear answer to these questions: We empower people to transform education – for a better tomorrow.

A world in which technology
enables everyone to
benefit from the best
possible education.


We believe that the future of
learning is highly personalized,
engaging and relevant
for our every day life.



What should this better tomorrow look like? Our vision paints a picture of the educational future we would like to contribute to: A world where technology enables everyone to participate in education. Because: We believe that the future of learning is highly personalised, engaging and relevant to real life.

We build the operating system
for modern education.


We simplify communication
and organization to connect
people and to make learning
more effective and
accessible worldwide.


What are we doing every day to make our vision of the future come true? Our mission is: We build the operating system for modern education. We simplify communication and organisation to connect people and make learning more effective and accessible worldwide.

Our Story

Sdui started in 2015 as a school project at a high school in Westerwald. Daniel Zacharias, Jan Micha Kroll and other students noticed back then: Relevant information does not end up where it is needed in everyday school life. There was no change in sight – so they developed their own solutions to these problems: As part of a school project, the students worked on an app that makes substitution plans digitally available to everyone. The project won several awards at the “Jugend forscht” contest in the years to follow.

Some schools were interested in the app. Convinced that their idea could make an important contribution to the digitalisation of schools, Daniel and Micha founded Sdui GmbH in February 2018 after graduating from high school.

Today, Sdui is the fastest growing start-up in the German edtech industry with offices in Koblenz and Berlin, around 150 employees and more than 10,000 schools and day care centres reached (as of February 2022). In order to reach even more educational institutions with Sdui’s solutions, the platform is also being offered in other European countries.

The team in summer 2020
Jan Micha Kroll, Daniel Zacharias and Timo Stosius

Sdui Group

To make an even bigger impact on the digitalisation of education, we unite the best solutions from schools and day care centres in Europe under the Sdui Group umbrella.

Pupil AG

The Swiss school management software PUPIL offers 45 modules as an all-in-one solution for the organisation of everyday school life.

Konecto App

Many Belgian schools trust the Konecto app: It’s the market leader in the French-speaking region Wallonia.

Sdui is backed by:

among others known for Zalando and Flixbus

Investmentholding Franz Haniel & Cie.

The leading ed-tech venture capital firm in Europe

Europas #1 Seedinvestor

Founder Factory Berlin


Dirk Freise & Martin Ostermayer

Development bank of the state of Rhineland-Palatinate

D. Nothacker, J. Köhler & N. Schefenacker

Hinderer - 2ms

Family Office JSM Hinderer GmbH

Kreos Capital is the leading growth debt provider in Europe and Israel