High-Tech Gründerfonds invests in Sdui – The school app extends its seed financing to around two million euros

February 6, 2020

The school app Sdui extends its seed financing. The potential of the central communication platform, on which teachers, students and parents can exchange information in a GDPR-compliant manner, convinced High-Tech Gründerfonds (HTGF) and business angels Martin Ostermayer and Dirk Freise (,, among others) to join the seed round as new lead investors. The Investitions- und Strukturbank Rheinland-Pfalz (ISB) as well as Udo Schloemer, founder and CEO of Factory Berlin, have also joined the seed round extension as existing investors, bringing the total raised amount up to around two million euros.

It is a big step for us, but also for education in Germany as a whole, that the largest seed investor HTGF and other well-known investors will become part of Sdui. Together we are now tackling the next milestones to advance digitization in schools and to change the educational system significantly.

Daniel Zacharias, CEO of Sdui.

The company, founded by Daniel Zacharias (22) and Jan Micha Kroll (21), started as a student project, being awarded by Jugend forscht multiple times. In 2018, Sdui joined the start-up accelerator program of PANDO Ventures. Today, the Koblenz-based company employs a team of more than 30 employees. The app not only ensures GDPR-compliant communication between schools, parents and students, but also relieves headmasters and teachers of administrative and organizational tasks – digital timetables and substitution plans are available centrally via the school app at any time, independent of one’s location.

The strong market interest for the developed solution as well as the young team’s ability to bring their product to the market at a rapid pace by the means of clever sales approaches as well as well-thought strategic partnerships, convinced us.

Maurice Kügler, Investment Manager at HTGF

The app is already being used by around 1,000 schools throughout Germany, which are using the platform to simplify their everyday life in a digital and most importantly data-compliant way. After a two-year trial period, the city of Solingen, for example, is now completely committed to Sdui and is introducing the school app as a standard for all Solingen schools. The total number of users is in the high six-digit range, the annual sales growth rate is 400 percent.

About Sdui
Sdui is the digital platform for secure communication and organization in schools. It is the GDPR-compliant replacement for all other messenger apps in the education sector. With Sdui, students, teachers and parents can interact more easily than ever before: all important information about teaching, such as timetables and substitution schedules, letters to parents and announcements are easily communicated via the platform and can be accessed via the smartphone app or on the desktop. With a cloud, a digitizes class register, room bookings and other integrations, Sdui becomes a central platform that digitizes schools and simplifies communication in all areas. The young founders Daniel Zacharias and Jan Micha Kroll from Koblenz started developing the app in 2015 as part of a school project for Jugend forscht, and Sdui GmbH was founded in 2018. The company currently employs around 30 people. The app has received several awards and is used by entire cities and districts nationwide as a standard for data protection-safe school communication. Further information about

Doreen Görisch & Steffi Jarosch
M: +49 172 3947051

About High-Tech Gründerfonds
High-Tech Gründerfonds (HTGF) is a seed investor that finances high-potential, tech-driven start-ups. With around EUR 900 million in total investment volume across three funds and an international network of partners, HTGF has already helped forge almost 600 start-ups since 2005. Driven by their expertise, entrepreneurial spirit and passion, its team of experienced investment managers and startup experts help guide the development of young companies. HTGF’s focus is on high-tech start-ups in the fields of digital business models, industrial technology, life sciences, chemistry and related business areas. To date, external investors have injected over EUR 2.4 billion into the HTGF portfolio via more than 1,500 follow-on financing rounds. HTGF has also successfully sold interests in more than 100 companies.

Investors in this public-private partnership include the Federal Ministry For Economic Affairs and Energy, KfW Capital, and Fraunhofer-Gesellschaft e.V., as well as the companies ALTANA, BASF, BAYER, B.Braun, Boehringer Ingelheim, Robert Bosch, BÜFA, CEWE, Deutsche Post DHL, Dräger, Drillisch AG, EVONIK, EWE AG, FOND OF, Haniel, Hettich, Knauf, Körber, LANXESS, media + more venture Beteiligungs GmbH & Co. KG, PHOENIX CONTACT, Postbank, QIAGEN, RWE Generation SE, SAP, Schufa, Schwarz Gruppe, STIHL, Thüga, Vector Informatik, WACKER and Wilh. Werhahn KG.

High-Tech Gründerfonds Management GmbH
Dr. Maurice Kügler
Schlegelstraße 2
53113 Bonn
T: +49 228 823 00 174

Stay up to date

Subscribe now and receive the latest press releases on investments and other news from High-Tech Gründerfonds. We inform you about important developments at HTGF and provide you with interesting news from our portfolio. Whether it’s a successful exit, a new exciting investment or HR news – you’ll be the first to know!

More Press posts

25. September 2023

traceless materials secures €36.6 Million Series A to build first industry plant for bio-circular alternative to plastic

The financing round was led by UB FIGG and SWEN CP’s Blue Ocean fund. traceless materials secures the funding to expand the production capabilities for its innovative biomaterial technology to industrial scale. Hamburg, Germany - September 25, 2023. Bioeconomy startup traceless, which produces a natural biomaterial as an alternative to plastic, announces the completion of a €36.6 million funding round. The Series A funding round is led by private equity fund UB Forest Industry Green G
15. September 2023

Successful exit for HTGF: adivo joins Zoetis to bring the benefits of species-specific antibody therapies to pet owners worldwide

adivo’s team and platform will strengthen Zoetis’ capabilities in therapeutic antibody drug discovery for companion animals. High-Tech Gründerfonds (HTGF) was among the first investors in a seed round in 2018 together with OCCIDENT and MorphoSys AG and closely supported the successful development of adivo. Dr. Kathrin Ladetzki-Baehs, Founder and CEO of adivo: “I look forward to seeing what our team can achieve as part of a leading organization with global reach while continuing
14. September 2023

​​​​​viboo closes CHF 1.5m seed round to fully commercialize its predictive energy efficiency platform to decarbonize buildings

High-Tech Gründerfonds, Swisscom Ventures and Rainmaking Impact have invested CHF 1.5 million into Swiss climate tech start-up viboo.  The seed round showed strong investor interest and confidence in viboo’s innovative energy-saving solutions for buildings.  viboo will use the funding to scale up the commercialization of its proven Predictive Control as a Service platform, capitalizing on the upcoming heating season to make a significant impact in decarbonizing buildings.