About Us

SIDACT is a spin-off of Fraunhofer based in Germany founded in August 2012. SIDACT markets, supports and further develops FEMZIP and DIFFCRASH since January 1st, 2013. FEMZIP and DIFFCRASH were developed by members of the Numerical Software department of the Fraunhofer Institute SCAI since 2002. This work was partly funded by the German Ministry for Research and Technology (BMBF) and the European Commission as part of the SIMDAT, AUTOBENCH and AUTO-OPT projects. The copyright for the software versions until 2012 is still owned by Fraunhofer. Six patents are exclusively licensed by SIDACT from Fraunhofer for engineering applications protecting the kernel technologies of its products. Six scientists from Fraunhofer joined SIDACT and work for support and further developments of the SIDACT products.

We like to use advanced math in software products or tailored applications to improve the usability of numerical simulations and gaining further insights from vast amount of numerical simulation results.   

Today’s customers of SIDACT are car manufactures from Europe, US, India, China, South Korea and Japan. SIDACT products are supported by local distributors in all of these regions.

In 2016 Sidact GmbH was awarded with the seal of approval „Innovative through research” by the Stifterverband für Deutsche Wissenschaft.

Your contacts:

Contact for FEMZIP-LPR:

Clemens-August Thole

Founder and owner manager. Diploma in mathematics and author of more than 50 scientific publications and three patents. 1984-2001 Scientist at GMD – Forschungszentrum Informationstechnik. 2001-2012 Fraunhofer Institute for Algorithms and Scientific Computing (SCAI), Head of Department "Numerical Software" (NUSO), Head of SCAI's Lab at University of Cologne. The Josef von Fraunhofer Preis 2007 was awarded to his colleagues and him for the FEMZIP.

Contact for DIFFCRASH:

Dominik Borsotto

Holding a diploma degree in “Medical Engineering and Sports Medical Engineering”, Dominik Borsotto pursued the Master program in “Applied Physics” (M.Sc.) at the University of Applied Sciences in Remagen, Germany.

After having worked as a research associate at Queen Mary University London at the department of engineering and at Fraunhofer SCAI in Sankt Augustin, in the department of numerical software, he joined SIDACT in April 2013. Since then he is working on the DIFFCRASH project as a developer and software manager.

Contact for FEMZIP-CFD:

Stefan Müller

Holding a Diploma Degree in Mathematics, he is author of several scientific publications and one patent.

After joining the department of numerical software (NUSO) at Fraunhofer SCAI in 2008, he continues with SIDACT GmbH. Since 2015, he is product manager of FEMZIP-CFD.


SIDACT at NAFEMS World Congress 23, May 15-18, 2023 in Tampa, Florida
First release of FEMZIP-SIMH v1.0.268 to support CCM+ results in SIMH format
First ANSYS ACT for FEMZIP compression and decompression of AM APDL result files available
SIDACT at NAFEMS DACH 22, October 04-06, 2022 in Bamberg
NAFEMS Membership
FEMZIP-CFD ParaView Plugin on Windows
Log4J Vulnerability (CVE-2021-44228)
SIDACT at virtual NAFEMS World 21, October 25-29, 2020
FEMZIP-ENSG 7.0 supports Measured/Particle data
SIDACT moved to the new premises in the "Medienfabrik" in Bonn-Beuel
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Werksstudent FEMZIP
Softwareentwicklung FEMZIP
Werksstudent DIFFCRASH
Softwareentwicklung DIFFCRASH